SGS Thomson Microelectronics PSD813F2, PSD813F2V, PSD813F3, PSD813F3V, PSD813F4 Datasheet

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PRELIMINARY DATA

June 2003

This is preliminary information on a new product now in development or undergoing evaluation. Details are subject to change without notice.

Rev. 3.0

PSD813F2/3/4/5, PSD833F2

PSD834F2, PSD853F2, PSD854F2

Flash In-System Pro gramma bl e

(ISP) Peripherals For 8-bit MCUs

FEATURES SUMMARY

■ 5V±10% Single Supply Voltage

■ Up to 2Mbit of Primary Flash Memory (8 uniform

sectors, 32K x 8)

■ Up to 256Kbit Secondary Flash Memory (4

uniform sectors)

■ Up to 2 56Kbi t SRAM

■ Over 3,000 Gates of PLD: DPLD and CPLD

■ 27 Reconfigurable I/O ports

■ Enhanced JTAG Serial Port

■ Programmable power managem ent

■ High Endurance:

– 100,000 Erase/WRITE Cycles of Flash

Memory

– 1,000 Erase/W RITE Cycles of PLD

Figure 1. 52-pin, Plastic, Quad, Flat Package

Figure 2. 52-lead, Plastic-Lead Chip Carrier

PQFP52 (T)

PLCC52 (K)

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TABLE OF CONTENTS

SUMMARY DESCRIPTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Table 1. Product Range (Note 1). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

KEY FEATURES. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Figure 3. PSD8XXFX Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

PSD8XXFX ARCHITECTURAL OVERVIEW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Memory. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Page Register. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

PLDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Table 2. PLD I/O . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

I/O Ports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

MCU Bus Interface. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

JTAG Port. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

In-System Programming (ISP) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12

Power Management Unit (PMU) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Table 3. JTAG SIgnals on Port C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Table 4. Methods of Programming Different Functional Blocks of the PSD8XXFX. . . . . . . . . . . . . 12

DEVELOPMENT SYSTEM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Figure 4. PSDsoft Express Development Tool . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

PIN DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Table 5. Pin Description (for the PLCC52 package - Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

PSD8XXFX Register Description and Address Offset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Table 6. I/O Port Latched Address Output Assignments (Note1) . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Table 7. Register Address Offset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

DETAILED OPERATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

MEMORY BLOCKS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Primary Flash Memo ry and Seco nd ary Flash memo ry Descr iption . . . . . . . . . . . . . . . . . . . . . 18

Memory Block Select Signals. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Table 8. Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Power-down Instruction and Power-up Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

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READ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Table 9. Status Bit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Programming Flash Memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22

Figure 5. Data Polling Flowchart. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Figure 6. Data Toggle Flowchart. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Erasing Flash Memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Specific Features. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Table 10. Sector Protection/Security Bit Definition – Flash Protection Register . . . . . . . . . . . . . . . 25

Table 11. Sector Protection/Security Bit Definition – PSD/EE Protection Register. . . . . . . . . . . . . 25

SRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

Sector Select and SRAM Select. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26

Figure 7. Priority Level of Memory and I/O Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

Table 12. VM Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Figure 8. 8031 Memory Modules – Separate Space. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Figure 9. 8031 Memory Modules – Combined Space . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Page Register. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Figure 10. Page Register. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

PLDS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Table 13. DPLD and CPLD Inputs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30

The Turbo Bit in PSD8XXFX. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Figure 11. PLD Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Decode PLD (DPLD) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

Figure 12. DPLD Logic Array. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

Complex PLD (CPLD) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Figure 13. Macrocell and I/O Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Output Macrocell (OMC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

Table 14. Output Macrocell Port and Data Bit Assignments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

Product Term Allocator. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

Figure 14. CPLD Output Macrocell . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

Input Macrocells (IMC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

Figure 15. Input Macrocell. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

Figure 16. Handshaking Communication Using Input Macrocells. . . . . . . . . . . . . . . . . . . . . . . . . . 39

MCU BUS INTERFACE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

Table 15. MCUs and their Control Signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

Figure 17. An Example of a Typical 8-bit Multiplexed Bus Interface . . . . . . . . . . . . . . . . . . . . . . . . 41

Figure 18. An Example of a Typical 8-bit Non-Multiplexed Bus Interface . . . . . . . . . . . . . . . . . . . . 42

Table 16. Eight-Bit Data Bus. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

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MCU Bus Interface Examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

Figure 19. Interfacing the PSD8XXFX with an 80C31 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

Table 17. 80C251 Configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 3

Table 18. Interfacing the PSD8XXFX with the 80C251, with One READ Input. . . . . . . . . . . . . . . . 44

Figure 20. Interfacing the PSD8XXFX with the 80C251, with RD and PSEN Inputs. . . . . . . . . . . . 45

Figure 21. Interfacing the PSD8XXFX with the 80C51X, 8-bit Data Bus. . . . . . . . . . . . . . . . . . . . . 46

Figure 22. Interfacing the PSD8XXFX with a 68HC11 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

I/O PORTS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 8

General Port Architecture. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

Figure 23. General I/O Port Architecture. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .48

Port Operating Modes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

MCU I/O Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

PLD I/O Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

Address Ou t Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

Table 19. Port Operating Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

Table 20. Port Operating Mode Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

Table 21. I/O Port Latched Address Output Assignments. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

Address In Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

Data Port Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

Peripheral I/O Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 1

JTAG In-System Programming (ISP). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

Figure 24. Peripheral I/O Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

Port Configuration Registers (PCR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

Table 22. Port Configuration Registers (PCR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

Table 23. Port Pin Direction Control, Output Enable P.T. Not Defined . . . . . . . . . . . . . . . . . . . . . . 52

Table 24. Port Pin Direction Control, Output Enable P.T. Defined . . . . . . . . . . . . . . . . . . . . . . . . . 52

Table 25. Port Direction Assignment Example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

Table 26. Drive Register Pin Assignment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

Port Data Registers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

Table 27. Port Data Registers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

Ports A and B – Functionality and Structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

Figure 25. Port A and Port B Structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

Port C – Functionality and Structure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

Figure 26. Port C Structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

Port D – Functionality and Structure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

Figure 27. Port D Structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

External Chip Select . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 7

Figure 28. Port D External Chip Select Signals. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

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POWER MANAGEMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 8

Table 28. Power-down Mode’s Effect on Ports. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59

Figure 29. APD Unit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59

Table 29. PSD8XXFX Timing and Stand-by Current during Power-down Mode. . . . . . . . . . . . . . . 59

Figure 30. Enable Power-down Flow Chart. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60

PLD Power Management. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61

Table 30. Power Management Mode Registers PMMR0 (Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . 61

Table 31. Power Management Mode Registers PMMR2 (Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . 61

PSD Chip Select Input (CSI, PD2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .62

Input Clock. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62

Input Control Signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62

Table 32. APD Counter Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62

RESET TIMING AND DEVICE STATUS AT RESET . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63

Warm Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63

I/O Pin, Register and PLD Status at Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63

Reset of Flash Memory Erase and Program Cycles (on the PSD834Fx) . . . . . . . . . . . . . . . . . 63

Figure 31. Reset (RESET) Timing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63

Table 33. Status During Power-On Reset, Warm Reset and Power-down Mode. . . . . . . . . . . . . . 64

PROGRAMMING IN-CIRCUIT USING THE JTAG SERIAL INTERFACE . . . . . . . . . . . . . . . . . . . . . . 65

Standard JTAG Signals. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65

Table 34. JTAG Port Signals. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65

JTAG Extensions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 6

Security and Flash memory Protection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66

INITIAL DELIVERY STATE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66

Table 35. JTAG Enable Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 6

AC/DC PARAMETERS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67

Figure 32. PLD ICC /Frequency Consumption (5 V range). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67

Figure 33. PLD ICC /Frequency Consumption (3 V range). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68

Table 36. Example of PSD8XXFX Typical Power Calculation at V

= 5.0 V (Turbo Mode On) . . 69

Table 37. Example of PSD8XXFX Typical Power Calculation at V

= 5.0 V (Turbo Mode Off) . . 70

MAXIMUM RATING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71

Table 38. Absolute Maximum Ratings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71

PSD8XXF2/3/4/5

6/103

DC AND AC PARAMETERS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 2

Table 39. Operating Conditions (5V devices) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72

Table 40. Operating Conditions (3V devices) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72

Table 41. AC Measurement Conditions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72

Figure 34. AC Measurement I/O Waveform . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72

Figure 35. AC Measurement Load Circuit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72

Table 42. Capacitance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72

Table 43. AC Symbols for PLD Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .73

Figure 36. Switching Waveforms – Key. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .73

Table 44. DC Characteristics (5V devices) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74

Table 45. DC Characteristics (3V devices) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75

Figure 37. Input to Output Disable / Enable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76

Table 46. CPLD Combinatorial Timing (5V devices). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .76

Table 47. CPLD Combinatorial Timing (3V devices). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .76

Figure 38. Synchronous Clock Mode Timing – PLD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77

Table 48. CPLD Macrocell Synchronous Clock Mode Timing (5V devices) . . . . . . . . . . . . . . . . . . 77

Table 49. CPLD Macrocell Synchronous Clock Mode Timing (3V devices) . . . . . . . . . . . . . . . . . . 78

Figure 39. Asynchronous Reset / Preset. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79

Figure 40. Asynchronous Clock Mode Timing (product term clock) . . . . . . . . . . . . . . . . . . . . . . . . 79

Table 50. CPLD Macrocell Asynchronous Clock Mode Timing (5V devices) . . . . . . . . . . . . . . . . . 80

Table 51. CPLD Macrocell Asynchronous Clock Mode Timing (3V devices) . . . . . . . . . . . . . . . . . 81

Figure 41. Input Macrocell Timing (product term clock) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82

Table 52. Input Macrocell Timing (5V devices) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82

Table 53. Input Macrocell Timing (3V devices) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82

Figure 42. READ Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83

Table 54. READ Timing (5V devices) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .84

Table 55. READ Timing (3V devices) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .85

Figure 43. WRITE Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 6

Table 56. WRITE Timing (5V devices) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .87

Table 57. WRITE Timing (3V devices) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .88

Table 58. Program, WRITE and Erase Times (5V devices) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89

Table 59. Program, WRITE and Erase Times (3V devices) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89

Figure 44. Peripheral I/O READ Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90

Table 60. Port A Peripheral Data Mode READ Timing (5V devices). . . . . . . . . . . . . . . . . . . . . . . . 90

Table 61. Port A Peripheral Data Mode READ Timing (3V devices). . . . . . . . . . . . . . . . . . . . . . . . 91

Figure 45. Peripheral I/O WRITE Timing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92

Table 62. Port A Peripheral Data Mode WRITE Timing (5V devices) . . . . . . . . . . . . . . . . . . . . . . . 92

Table 63. Port A Peripheral Data Mode WRITE Timing (3V devices) . . . . . . . . . . . . . . . . . . . . . . . 92

Figure 46. Reset (RESET) Timing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93

Table 64. Reset (RESET) Timing (5V devices). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93

Table 65. Reset (RESET) Timing (3V devices). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93

Table 66. V

STBYON

Timing (5V devices) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93

Table 67. V

STBYON

Timing (3V devices) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93

7/103

PSD8XXF2/3/4/5

Figure 47. ISC Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94

Table 68. ISC Timing (5V devices) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94

Table 69. ISC Timing (3V devices) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95

Table 70. Power-down Timing (5V devices) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95

Table 71. Power-down Timing (3V devices) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95

PACKAGE MECHANICAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96

Figure 48. PQFP52 Connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 6

Figure 49. PLCC52 Connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96

Figure 50. PQFP52 - 52-pin Plastic, Quad, Flat Package Mechanical Drawing . . . . . . . . . . . . . . . 96

Table 72. PQFP52 - 52-pin Plastic, Quad, Flat Package Mechanica l Dimensions . . . . . . . . . . . . . 97

Figure 51. PLCC52 - 52-lead Plastic Lead, Chip Carrier Package Mechanical Drawing . . . . . . . . 98

Table 73. PLCC52 - 52-lead Plastic Lead, Chip Carrier Package Mechanical Dimensions . . . . . . 98

PART NUMBERING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99

Table 74. Ordering Information Scheme . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99

APPENDIX A. PQFP52 PIN ASSIGNMENTS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100

APPENDIX B. PLCC52 PIN ASSIGNMENTS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101

REVISION HISTORY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102

PSD8XXF2/3/4/5

8/103

SUMMARY DESCRIPTION

The PSD8XXFX family of memory systems for mi-

crocontrollers (MCUs) brings In-System-Program-

mability (ISP) to Flash memory and programmable

logic. The result is a simple and flexible solution for

embedded designs. PSD8X X FX dev ices co mbine

many of the peripheral functions found in MCU

based applications.

Table 1 summarizes all the devices in the

PSD834F2, PSD853F2, PSD854F2.

The CPLD in the P SD 8XX FX devices features an

optimized macrocell logic architecture. The PSD

macrocell was created to address the unique re-

quirements of embedded system designs. It al-

lows direct connection between the system

address/data bus, and the internal PSD8XXFX

registers, to simplify communi cation between the

MCU and other supporting devices.

The PSD8XXFX device includes a JTAG Serial

Programming interface, to allow In-System Pro-

gramming (ISP) of the

entire device

. This feature

reduces development time, simplifies the manu-

facturing flow, and dramatically lowers the cost of

field upgrades. Using ST’s special Fast-JTAG pro-

gramming, a design can be rapidly programmed

into the PSD8XXFX in as little as seven seconds.

The innovative PSD8XXFX family solves key

problems faced by designers when managing dis-

crete Flash memory devices, such as:

– First-time In-System Programming (ISP)

– Complex address dec oding

– Simultaneous read and write to the device.

The JTAG Serial Interface block allows In-System

Programming (ISP), and eliminates the need for

an external Boot EPROM, or an external program-

mer. To simplify Flash memory updates, program

execution is performed from a secondary Flash

memory while the primary Flash memory is being

updated. This solution avoids the complicated

hardware and software overhead necessary to im-

plement IAP.

ST makes available a software devel opment tool,

PSDsoft Express, that generates ANSI-C com pli-

ant code for us e w ith y our t arget M CU. T his code

allows you to manipulate the non-volatile memory

(NVM) within the PSD8XXFX. Code examples are

also provided for:

– Flash memory IAP via the UART of the host

MCU

– Memory paging to execute code across several

PSD8XXFX memory pages

– Loading, reading, and manipulation of

PSD8XXFX macrocells by the MCU.

Table 1. Product Range (Note 1)

Note: 1. All product s suppor t: JTAG se rial ISP, MCU para llel ISP, I SP Flash me mory, I SP CPLD, Security features, Power M anagem ent

Unit (PMU), Autom a t ic Power-down (APD )

2. SRAM ma y be backed up usi ng an external battery.

Part Number

Primary Flash

Memory

(8 Sectors)

Secondary

Flash Memory

(4 Sectors)

SRAM

I/O Ports

Number of

Macrocells

Serial

ISP

JTAG/

ISC Port

Turbo

Mode

Input Output

PSD813F2 1 Mbit 256 Kbit 16 Kbit 27 24 16 yes yes

PSD813F3 1 Mbit none 16 Kbit 27 24 16 yes yes

PSD813F4 1 Mbit 256 Kbit none 27 24 16 yes yes

PSD813F5 1 Mbit none none 27 24 16 yes yes

PSD833F2 1 Mbit 256 Kbit 64 Kbit 27 24 16 yes yes

PSD834F2 2 Mbit 256 Kbit 64 Kbit 27 24 16 yes yes

PSD853F2 1 Mbit 256 Kbit 256 Kbit 27 24 16 yes yes

PSD854F2 2 Mbit 256 Kbit 256 Kbit 27 24 16 yes yes

9/103

PSD8XXF2/3/4/5

KEY FEATURES

■ A simple interface to 8-bit microcontrollers that

use either multiplexed or non-multiplexed

busses. The bus interface logic uses the control

signals generated by the microcontroller

automatically when the address is decoded and

a READ or WRITE is performed. A partial list of

the MCU families supported include:

– Intel 8031, 80196, 80186, 80C251, and

80386EX

– Motorola 68HC11 , 68HC16, 68HC12, and

683XX

– Philips 8031 and 8051XA

– Zilog Z80 and Z8

■ Internal 1 or 2 Mbit Flash memory. This is the

main Flash memory. It is divided into eight

equal-sized blocks that can be accessed with

user-specified addresses.

■ Internal secondary 256 Kbit Flash boot memory.

It is di vided into f our equal-si zed blo cks that can

be accessed with user-specified addresses.

This seconda ry me mo ry brings th e abilit y to

execute code and update the main Flash

concurrently

■ Optional 16, 64 or 256 Kbit SRAM. The SRAM’s

contents can be protected from a power failure

by connecting an external battery.

■ CPLD with 16 Output Micro Cells (OMCs) and

24 Input Micro Cells (IMCs). The CPLD may be

used to efficiently implement a variety of logic

functions for internal and external control.

Examples include state machines, loadable

shift registers, and loadable counters.

■ Decode PLD (DPLD) that decodes address for

selection of internal memory blocks.

■ 27 individually configurable I/O port pins that

can be used for the following functions:

– MCU I/Os

–PLD I/Os

– Latched MCU address output

– Specia l function I/Os.

– 16 of the I/O ports may be configured as

open-drain outputs.

■ Standby current as low as 50 µA for 5 V devices.

■ Built-in JTAG compliant serial port allows full-

chip In-System Programmability (ISP). With it,

you can program a blank device or reprogram a

device in the factory or the field.

■ Internal page register that can be used to

expand the microcontroller address space by a

factor of 256.

■ Internal programmable Power Management

Unit (PMU) that supports a low power mode

called Power Down Mode. The PMU can

automatically detect a lack of microcontroller

activity and put the PSD8XXF into Power-down

mode.

■ Erase/WRITE cycles:

– Flash memory – 100,000 minimum

– PLD – 1,000 minimum

– Data Retention: 15 year minimum (for Main

Flash memory, Boot, PLD and Configuration

bits)

PSD8XXF2/3/4/5

10/103

Figure 3. PSD8XXFX Block Diagram

PROG.

MCU BUS

INTRF.

ADIO

PORT

CNTL0,

CNTL1,

CNTL2

AD0 – AD15

CLKIN

(PD1)

CLKIN

PLD

INPUT

BUS

PROG.

PORT

PROG.

PORT

POWER

MANGMT

UNIT

1 OR 2 MBIT PRIMARY

FLASH MEMORY

8 SECTORS

VSTDBY

PA0 – PA7

PB0 – PB7

PROG.

PORT

PROG.

PORT

PC0 – PC7

PD0 – PD2

ADDRESS/DATA/CONTROL BUS

PORT A ,B & C

3 EXT CS TO PORT D

24 INPUT MACROCELLS

PORT A ,B & C

256 KBIT SECONDARY

NON-VOLATILE MEMORY

(BOOT OR DATA)

4 SECTORS

256 KBIT BATTERY

BACKUP SRAM

RUNTIME CONTROL

AND I/O REGISTERS

SRAM SELECT

PERIP I/O MODE SELECTS

MACROCELL FEEDBACK OR PORT INPUT

CSIOP

FLASH ISP CPLD

(CPLD)

16 OUTPUT MACROCELLS

FLASH DECODE

PLD

(

DPLD

)

PLD, CONFIGURATION

& FLASH MEMORY

LOADER

JTAG

SERIAL

CHANNEL

(

PC2

)

PAGE

EMBEDDED

ALGORITHM

SECTOR

SELECTS

SECTOR

SELECTS

GLOBAL

CONFIG. &

SECURITY

AI02861E

11/103

PSD8XXF2/3/4/5

PSD8XXFX ARCHITECTURAL OVERVIEW

PSD8XXFX devices contain several major func-

tional blocks. Figure 3 shows the architecture of

the PSD8XXFX device family. The functions of

each block are d escribed briefly in the following

sections. Many of the blocks perform multiple

functions and are user configurable.

Memory

Each of the memory blocks is briefly discussed in

the following paragraphs. A more detail ed di scus-

sion can be fo und in the section ent itled “MEM O-

RY BLOCKS“ on page 18.

The 1 Mbit or 2 Mbit (128K x 8, or 256K x 8) Flash

memory is the primary memory of the PSD8XXFX.

It is divided into 8 equally-sized sectors that are in-

dividually selectable.

The optional 256 Kbit (32K x 8) secondary Flash

memory is divided into 4 equally-sized sectors.

Each sector is individually selectable.

The optional SRAM is intended for use as a

scratch-pad memory or as an extension to the

MCU SRAM. If an external battery is connected to

Voltage Stand-by (V

STBY

, PC2), data is retained in

the event of power failure.

Each sector of mem ory can be located in a differ-

ent address space as defined by the user. The ac-

cess times for all memory types includes the

address latching and DPLD decoding time.

Page R egi s te r

The 8-bit Page Register expands the address

range of the MCU by up to 256 times. The paged

address can be used as part of the address space

to access external memory and peripherals, or in-

ternal memory and I/O. The Page Register can

also be used to change the address mapping of

sectors of the Flash memories into different mem-

ory spaces for IAP.

PLDs

The device contains t wo PLDs, the Decode PLD

(DPLD) and the Complex PLD (CPLD), as shown

in Table 2, each op timized for a different function.

The functional partitioning of the PLDs reduces

power consumption, optim izes cost/performance,

and eases design entry.

Table 2. PLD I/O

The DPLD is used to decode addresses and to

generate Sector Select signals for the PSD8XXFX

internal memory and registers. The DPLD has

combinatorial outputs. T he CPLD has 16 Output

Macrocells (OMC) and 3 combinatorial outputs.

The PSD8XXFX also has 24 Input Macrocells

(IMC) that can be configured as inputs to the

PLDs. The PLDs receive their inputs from the PLD

Input Bus and are differentiated by their output

destinations, number of product terms, an d mac-

rocells.

The PLDs consume minimal power. The speed

and power consumption of the PLD i s controlled

by the Turbo bit in PMMR0 and othe r bits in the

PMMR2. These registers are set by the MCU at

run-time. There is a slight penalty to PLD propaga-

tion time when invoking the power management

features.

I/O P or t s

The PSD8XXFX has 27 individually configurable I/

O pins distributed over the four ports (Port A , B, C,

and D). Each I/O pin can be individually configured

for different functions. Ports can be configured as

standard MCU I/O ports, PLD I/O, or latched ad-

dress outputs for MCUs using multiplexed ad-

dress/data buses.

The JTAG pins can be enabled o n Port C for In-

System Programming (ISP).

Ports A and B can a lso be configured as a data

port for a non-multiplexed bus.

MCU Bus Interface

PSD8XXFX interfaces easily with most 8-bit

MCUs that have either multiplexed or non-multi-

plexed address/data b uses. The de vice is config-

ured to respond to the MCU’s control signals,

which are also used as inputs to the PLDs. For ex-

amples, please see the section entitled “MCU Bus

Interface Examples“ on page 43.

Name Inputs Outputs

Product

Terms

Decode PLD (DPLD) 73 17 42

Complex PLD (CPLD) 73 19 140

PSD8XXF2/3/4/5

12/103

JTAG Port

In-System Programming (ISP) can be pe rformed

through the JTAG signals on Port C. This serial in-

terface allows complete programming of the entire

PSD8XXFX device. A bla nk device can be com-

pletely programmed. The JTAG signals (TMS,

TCK, TSTAT

, TERR, TDI, TDO) can be multi-

plexed with other functions on P ort C. Table 3 in-

dicates the JTAG pin assignments.

In-System Programming (ISP)

Using the JTAG signals on Port C, the entire

PSD8XXFX device can be programmed or erased

without the use of the MCU. The primary Flash

memory can also be programmed in-system by

the MCU executing the programming algorithms

out of the secondary memory, or SRAM. The sec-

ondary memory can be programmed the same

way by executing out of the pri mary F lash m emo-

ry. The PLD or other PSD8XXFX Configuration

blocks can be pr ogrammed thro ugh the JTAG port

or a device programmer. Table 4 in dicates which

programming methods can program different func-

tional blocks of the PSD8XXFX.

Power Management Unit (PMU)

The Power Management Unit (PMU) gives the

user control of the power consumption on selected

functional blocks based on system requirements.

The PMU includes an Automatic Power-down

(APD) Unit that turns off device functions during

MCU inactivity. The APD Unit has a Power-down

mode that helps reduce power consump t ion.

The PSD8XXFX al so has some bi ts that are con-

figured at run-time by the MCU to reduce power

consumption of the CPLD. The Turbo bit in

PMMR0 can be reset to 0 and the CPLD latches its

outputs and goes to sleep until the next transit ion

on its inputs.

Additionally, bits in PMMR2 can be set by the

MCU to block signals from entering the CP LD to

reduce power consumption. P lease see the sec-

tion entitled “POWER MANAGEMENT” on page

58 for more details.

Table 3. JTAG SIgnals on Port C

Table 4. Methods of Programming Different Functional Blocks of the PSD8XXFX

Port C Pins JTAG Signal

PC0 TMS

PC1 TCK

PC3 TSTAT

PC4 TERR

PC5 TDI

PC6 TDO

Functional Block JTAG Programming Device Programmer IAP

Primary Flash Memory Yes Yes Yes

Secondary Flash Memory Yes Yes Yes

PLD Array (DPLD and CPLD) Yes Yes No

PSD8XXFX Config urati on Yes Yes No

13/103

PSD8XXF2/3/4/5

DEVELOPMEN T SYST EM

The PSD8XXFX family is supported by PSDsoft

Express, a Windows-based software development

tool. A PSD8XXFX design is quickly and easily

produced in a point and click environment. The de-

signer does not need to enter Hardware Descrip-

tion Language (HDL) equations, unless desired, to

define PSD8XXFX pin functions and memory map

information. The general desig n flow is shown in

Figure 4. PSDsoft Express is available from our

web site (the address is given on the back page of

this data sheet) or other distribution channels.

PSDsoft Express directly supports two low cost

device programmers form ST: PSDpro and

FlashLINK (JTAG). Both of these programmers

may be purchased through your local distributor/

representative, or directly from our web site using

a credit card. The PSD8XXFX is also supported by

third party device programm ers. See our web site

for the current list.

Figure 4. PSDsoft Express Development Tool

PSD Configuration

PSD Fitter

PSD Simulator

PSD Programmer

*.OBJ FILE

PLD DESCRIPTION

CONFIGURE MCU BUS

INTERFACE AND OTHER

PSD ATTRIBUTES

LOGIC SYNTHESIS

AND FITTING

PSDsilos III

DEVICE SIMULATION

(OPTIONAL)

PSDPro, or

FlashLINK (JTAG)

ADDRESS TRANSLATION

AND MEMORY MAPPING

PSDabel

MODIFY ABEL TEMPLATE FILE

OR GENERATE NEW FILE

PSD TOOLS

GENERATE C CODE

SPECIFIC TO PSD

FUNCTIONS

USER'S CHOICE OF

MICROCONTROLLER

COMPILER/LINKER

*.OBJ AND *.SVF

FILES AVAILABLE

FOR 3rd PARTY

PROGRAMMERS

(CONVENTIONAL or

JTAG-ISC)

FIRMWARE

HEX OR S-RECORD

FORMAT

AI04918

PSD8XXF2/3/4/5

14/103

PIN DESCRIPTION

Table 5 describes the signal names and signal

functions of the PSD8XXFX.

Table 5. Pin Description (for the PLCC52 package - Note 1)

Pin Name Pin Type Description

ADIO0-7 30-37 I/O

This is the lower Address/Data port. Connect your MCU address or address/data bus

according to the following rules:

1. If your MCU has a multiplexed address/data bus where the data is multiplexed with the

lower address bits, connect AD0-AD7 to this port.

2. If your MCU does not have a multiplexed address/data bus, or you are using an

80C251 in page mode, connect A0-A7 to this port.

3. If you are using an 80C51XA in burst mode, connect A4/D0 through A11/D7 to this

port.

ALE or AS latches the address. The PSD8XXFX drives data out only if the READ signal is

active and one of the PSD8XXFX functional blocks was selected. The addresses on this

port are passed to the PLDs.

ADIO8-15 39-46 I/O

This is the upper Address/Data port. Connect your MCU address or address/data bus

according to the following rules:

1. If your MCU has a multiplexed address/data bus where the data is multiplexed with the

lower address bits, connect A8-A15 to this port.

2. If your MCU does not have a multiplexed address/data bus, connect A8-A15 to this

port.

3. If you are using an 80C251 in page mode, connect AD8-AD15 to this port.

4. If you are using an 80C51XA in burst mode, connect A12/D8 through A19/D15 to this

port.

ALE or AS latches the address. The PSD8XXFX drives data out only if the READ signal is

active and one of the PSD8XXFX functional blocks was selected. The addresses on this

port are passed to the PLDs.

CNTL0 47 I

The following control signals can be connected to this port, based on your MCU:

1. WR

– active Low Write Strobe input.

2. R_W

– active High READ/active Low write input.

This port is connected to the PLDs. Therefore, these signals can be used in decode and

other logic equations.

CNTL1 50 I

The following control signals can be connected to this port, based on your MCU:

1. RD

– active Low Read Strobe input.

2. E – E clock input.

3. DS

– active Low Data Strobe input.

4. PSEN

– connect PSEN to this port when it is being used as an active Low READ

signal. For example, when the 80C251 outputs more than 16 address bits, PSEN

actually the READ signal.

This port is connected to the PLDs. Therefore, these signals can be used in decode and

other logic equations.

CNTL2 49 I

This port can be used to input the PSEN

(Program Select Enable) signal from any MCU

that uses this signal for code exclusively. If your MCU does not output a Program Select

Enable signal, this port can be used as a generic input. This port is connected to the

PLDs.

Reset

48 I

Resets I/O Ports, PLD macrocells and some of the Configuration Registers. Must be Low

at Power-up.

15/103

PSD8XXF2/3/4/5

PA0

PA1

PA2

PA3

PA4

PA5

PA6

PA7

I/O

These pins make up Port A. These port pins are configurable and can have the following

functions:

1. MCU I/O – write to or read from a standard output or input port.

2. CPLD macrocell (McellAB0-7) outputs.

3. Inputs to the PLDs.

4. Latched address outputs (see Table 6).

5. Address inputs. For example, PA0-3 could be used for A0-A3 when using an 80C51XA

in burst mode.

6. As the data bus inputs D0-D7 for non-multiplexed address/data bus MCUs.

7. D0/A16-D3/A19 in M37702M2 mode.

8. Peripheral I/O mode.

Note: PA0-P A3 can only output CMOS signals with an option for high slew rate. However,

PA4-PA7 can be configured as CMOS or Open Drain Outputs.

PB0

PB1

PB2

PB3

PB4

PB5

PB6

PB7

I/O

These pins make up Port B. These port pins are configurable and can have the following

functions:

1. MCU I/O – write to or read from a standard output or input port.

2. CPLD macrocell (McellAB0-7 or McellBC0-7) outputs.

3. Inputs to the PLDs.

4. Latched address outputs (see Table 6).

Note: PB0-PB3 can only output CMOS signals with an option for high slew rate. However,

PB4-PB7 can be configured as CMOS or Open Drain Outputs.

PC0 20 I/O

PC0 pin of Port C. This port pin can be configured to have the following functions:

1. MCU I/O – write to or read from a standard output or input port.

2. CPLD macrocell (McellBC0) output.

3. Input to the PLDs.

4. TMS Input

for the JTAG Serial Interface.

This pin can be configured as a CMOS or Open Drain output.

PC1 19 I/O

PC1 pin of Port C. This port pin can be configured to have the following functions:

1. MCU I/O – write to or read from a standard output or input port.

2. CPLD macrocell (McellBC1) output.

3. Input to the PLDs.

4. TCK Input

for the JTAG Serial Interface.

This pin can be configured as a CMOS or Open Drain output.

PC2 18 I/O

PC2 pin of Port C. This port pin can be configured to have the following functions:

1. MCU I/O – write to or read from a standard output or input port.

2. CPLD macrocell (McellBC2) output.

3. Input to the PLDs.

4. V

STBY

– SRAM stand-by voltage input for SRAM battery backup.

This pin can be configured as a CMOS or Open Drain output.

PC3 17 I/O

PC3 pin of Port C. This port pin can be configured to have the following functions:

1. MCU I/O – write to or read from a standard output or input port.

2. CPLD macrocell (McellBC3) output.

3. Input to the PLDs.

4. TSTAT

output

for the JTAG Serial Interface.

5. Ready/Busy

output for parallel In-System Programming (ISP).

This pin can be configured as a CMOS or Open Drain output.

PC4 14 I/O

PC4 pin of Port C. This port pin can be configured to have the following functions:

1. MCU I/O – write to or read from a standard output or input port.

2. CPLD macrocell (McellBC4) output.

3. Input to the PLDs.

4. TERR

output

for the JTAG Serial Interface.

5. Battery-on Indicator (VBATON). Goes High when power is being drawn from the

external battery.

This pin can be configured as a CMOS or Open Drain output.

Pin Name Pin Type Description

PSD8XXF2/3/4/5

16/103

Note: 1. The pin numbers in this t abl e are for the PLCC package only. See the package inf ormation, on page 98 onwards, for pin nu mb ers

on other pa ck age types.

2. These functions ca n be m ultiplexe d wi th other functions.

PSD8XXFX REGISTER DESCRIPTION AND ADDRESS OFFSET

Table 7 shows the offset addresses to the

PSD8 XXFX regis ters re lati ve to th e CS IOP ba se

address. The CSIOP space is the 256 bytes of ad-

dress that is allocated by the user to the internal

PSD8XXFX registers. Table 7 provides brief de-

scriptions of the registers in CSIOP space. The fol-

lowing section gives a more detailed description.

PC5 13 I/O

PC5 pin of Port C. This port pin can be configured to have the following functions:

1. MCU I/O – write to or read from a standard output or input port.

2. CPLD macrocell (McellBC5) output.

3. Input to the PLDs.

4. TDI input

for the JTAG Serial Interface.

This pin can be configured as a CMOS or Open Drain output.

PC6 12 I/O

PC6 pin of Port C. This port pin can be configured to have the following functions:

1. MCU I/O – write to or read from a standard output or input port.

2. CPLD macrocell (McellBC6) output.

3. Input to the PLDs.

4. TDO output

for the JTAG Serial Interface.

This pin can be configured as a CMOS or Open Drain output.

PC7 11 I/O

PC7 pin of Port C. This port pin can be configured to have the following functions:

1. MCU I/O – write to or read from a standard output or input port.

2. CPLD macrocell (McellBC7) output.

3. Input to the PLDs.

4. DBE – active Low Data Byte Enable input from 68HC912 type MCUs.

This pin can be configured as a CMOS or Open Drain output.

PD0 10 I/O

PD0 pin of Port D. This port pin can be configured to have the following functions:

1. ALE/AS input latches address output from the MCU.

2. MCU I/O – write or read from a standard output or input port.

3. Input to the PLDs.

4. CPLD output (External Chip Select).

PD1 9 I/O

PD1 pin of Port D. This port pin can be configured to have the following functions:

1. MCU I/O – write to or read from a standard output or input port.

2. Input to the PLDs.

3. CPLD output (External Chip Select).

4. CLKIN – clock input to the CPLD macrocells, the APD Unit’s Power-down counter, and

the CPLD AND Array.

PD2 8 I/O

PD2 pin of Port D. This port pin can be configured to have the following functions:

1. MCU I/O – write to or read from a standard output or input port.

2. Input to the PLDs.

3. CPLD output (External Chip Select).

4. PSD Chip Select Input (CSI

). When Low, the MCU can access the PSD8XXFX

memory and I/O. When High, the PSD8XXFX memory blocks are disabled to conserve

power.

15, 38 Supply Voltage

GND

1, 16,

Ground pins

Pin Name Pin Type Description

17/103

PSD8XXF2/3/4/5

Table 6. I/O Port Latched Address Output Assignments (Note1)

Note: 1. See the sect i on entitle d “I/O PORTS”, on page 48, on how to enabl e the Latch ed A ddress Output funct i on.

2. N/A = Not Applicable

Table 7. Register Address Offset

Note: 1. Other registers that are not part of the I/O ports.

MCU

Port A Port B

Port A (3:0) Port A (7:4) Port B (3:0) Port B (7:4)

8051XA (8-bit) N/A Address a7-a4 Address a11-a8 N/A

80C251 (page mode) N/A N/A Address a11-a8 Address a15-a12

All other 8-bit multiplexed Address a3-a0 Address a7-a4 Address a3-a0 Address a7-a4

8-bit non-multiplexed bus N/A N/A Address a3-a0 Address a7-a4

Other

Description

Data In 00 01 10 11 Reads Port pin as input, MCU I/O input mode

Control 02 03 Selects mode between MCU I/O or Address Out

Data Out 04 05 12 13

Stores data for output to Port pins, MCU I/O output

mode

Direction 06 07 14 15 Configures Port pin as input or output

Drive Select 08 09 16 17

Configures Port pins as either CMOS or Open

Drain on some pins, while selecting high slew rate

on other pins.

Input Macrocell 0A 0B 18 Reads Input Macrocells

Enable Out 0C 0D 1A 1B

Reads the status of the output enable to the I/O

Port driver

Output Macrocells

20 20

READ – reads output of macrocells AB

WRITE – loads macrocell flip-flops

Output Macrocells

21 21

READ – reads output of macrocells BC

WRITE – loads macrocell flip-flops

Mask Macrocells AB 22 22 Blocks writing to the Output Macrocells AB

Mask Macrocells BC 23 23 Blocks writing to the Output Macrocells BC

Primary Flash

Protection

C0 Read only – Primary Flash Sector Protection

Secondary Flash

memory Protection

Read only – PSD8XXFX Security and Secondary

Flash memory Sector Protection

JTAG Enable C7 Enables JTAG Port

PMMR0 B0 Power Management Register 0

PMMR2 B4 Power Management Register 2

Page E0 Page Register

VM E2

Places PSD8XXFX memory areas in Program

and/or Data space on an individual basis.

PSD8XXF2/3/4/5

18/103

DETAILED OPERATION

As shown in Figure 3, the PSD8XXFX cons i sts of

six major types of functional blocks:

■ Memory Blocks

■ PLD Blocks

■ MCU Bus Interface

■ I/O Ports

■ Power Management Unit (PMU)

■ JTAG Interface

The functions of ea ch block are described i n the

following sections. Many of the blocks perform

multiple functions, and are user configurable.

MEMORY BLOCKS

The PSD8XXFX has the following memory blocks:

– Primary Flash memory

– Optional Secondary Flash memory

– Optio nal SRAM

The Memory Select signals for these blocks origi-

nate from the Decode PLD (DP LD) and are user-

defined in PSDsoft Express.

Primary Flash Memory and Secon dary F lash

memory Description

The primary Flash memory is divided evenly into

eight equal sectors. The secondary Flash memory

is divided into four e qual sectors. Each sect or of

either memory block can be s eparately protected

from Program and Erase cycles.

Flash memory may be erased on a sector-by-sec-

tor basis. Flash sector erasure may be suspended

while data is read from other sectors of the block

and then resumed after reading.

During a Program or Erase cycle in Flash memory,

the status can be output on Ready/Busy

(PC3).

This pin is set up using PSDsoft Express Configu-

ration.

Memory Block Select Signals

The DPLD generates the Select signals fo r all the

internal memory blocks (see the section entitled

“PLDS”, on p age 30 ). Eac h o f the eight sectors of

the primary Flash memory has a Select signal

(FS0-FS7) which can contain up to three prod uct

terms. Each of the four sectors of the secondary

Flash memory has a Select signal (CSBOOT0-

CSBOOT3) which can contain up to three product

terms. Having three product terms for each Select

signal allows a given sector to be mapped in differ-

ent areas of system memory. When using a MCU

with separate Program and Data space, these

flexible Select signals allow dynamic re-mapping

of sectors from one memory space to the other.

Ready/Busy

(PC3). This signal can be used to

output the Ready/Busy

status of the PSD8XXF X.

The output on Ready/Busy

(PC3) is a 0 (Busy)

when Flash memory is being written to,

when

Flash memory is being erased. The output is a 1

(Ready) when no WRITE or Erase cycle is in

progress.

Memory Operation . The primary Flash memory

and secondary Flash memory are addressed

through the MCU Bus Interface. The MCU can ac-

cess these memories in one of two ways:

■ The MCU can execute a typical bus WRITE or

READ

operation

just as it would if accessing a

RAM or ROM device using standard bus cycles.

■ The MCU can execute a specific instruction that

consists of several WRITE and READ

operations. This involves writing specific data

patterns to special addresses within the Flash

memory to invoke an embedded algorithm.

These instructions are summarized in Table 8.

Typically, the MCU can read Flash memory using

READ operations, just as it would read a ROM de-

vice. However, Flash memory can only be altered

using specific Erase and Program instructions. For

example, the MCU cannot write a single by te di-

rectly to Flash memory as it would write a byte to

RAM. To program a byte into Flash memory, t he

MCU must execute a Program instruction, then

test the status of the Program cycle. This status

test is achieved by a READ operation or polling

Ready/Busy

(PC3).

Flash memory can also be read by using special

instructions to retrieve particular Flash devi ce in-

formation (sector protect status and ID).

19/103

PSD8XXF2/3/4/5

Table 8. Instructions

Note: 1. All bus cyc l es are WRITE bus cycles, except the ones with the “READ” label

2. All values are in hexadecimal:

X = Don’t Care. Addresses of the form X XXXh, in this table, must be even addres ses

RA = Address of the memory l ocation to be read

RD = Data re ad from loca ti on RA during t he READ cyc le

PA = Address of the memory location to be programmed. Addresses are latched on the falling edge of Write Strobe (WR

, CNTL0).

PA is an even address fo r P SD in word programmin g mode.

PD = Data word to be progr am m ed at location PA. Data is la tc hed on the rising edge of Write Strobe (WR

, CNTL0)

SA = Addr ess of the se ctor to be erased or ve rified. T he Sec tor Sel ect (FS 0-FS7 o r CSB OOT0-CSBO OT3) of the se ctor t o be

erased, or verified, must be Active (High).

3. Sector Se l ect (FS0 to FS7 or CSBOOT0 to C SBOOT3) signals are act i ve High, and ar e defined in PSD soft Expre ss .

4. Only address bits A11-A0 are used in instruction decoding.

5. No Unloc k or instruction cycles are required when the devic e i s in the READ Mode

6. The Reset instruction is required to return to the READ Mode after reading the Flash ID, or after reading the Sector Protection Sta-

tus, or if the Er ror Flag (DQ5/DQ13) bit goes High.

7. Additi onal sectors to be erased must be written at the end of t he Sector Erase i nstructi on within 80µs.

8. The dat a is 00h for an unp rotected sector, and 01h for a protec ted sector. In the fourth c ycle, the Sec tor Select i s active, and

(A1,A0)= (1,0)

9. The Unlock Bypass instruction is required prior to the Unlock Bypass Program instruction.

10. The Unlock Bypas s Reset Flas h i nstructi on is requi red to return to readi ng memory data when t he device is i n the Unloc k Bypass

mode.

11. The system may perform READ and Program cycles in non-erasing sectors, read the Flash ID or read the Sector Protection Status

when in the S uspend Sector Erase mo de. T he Suspend Sector Erase instruction is valid only during a Secto r E rase cycle.

12. The Resume Sector Erase instruction is valid only during the Suspend Sector Erase mode.

13. The MCU can not i nvok e these inst ruct ion s whi le exe cutin g cod e from th e sa me Flash mem ory as t hat fo r which th e ins truc tio n is

intended. The MCU must fetch, for example, the code from the secondary Flash memory when reading the Sector Protection Status

of th e prima ry Flas h m em o ry.

Instruction

FS0-FS7 or

CSBOOT0-

CSBOOT3

Cycle 1 Cycle 2 Cycle 3 Cycle 4 Cycle 5 Cycle 6 Cycle 7

READ

“READ”

RD @ RA

Read Main

Flash ID

AAh@

X555h

55h@

XAAAh

90h@

X555h

Read identifier

(A6,A1,A0 = 0,0,1)

Read Sector

Protection

6,8,13

AAh@

X555h

55h@

XAAAh

90h@

X555h

Read identifier

(A6,A1,A0 = 0,1,0)

Program a

Flash Byte

AAh@

X555h

55h@

XAAAh

A0h@

X555h

PD@ PA

Flash Sector

Erase

7,13

AAh@

X555h

55h@

XAAAh

80h@

X555h

AAh@ XAAAh

55h@

XAAAh

30h@

30h

next SA

Flash Bulk

Erase

AAh@

X555h

55h@

XAAAh

80h@

X555h

AAh@ XAAAh

55h@

XAAAh

10h@

X555h

Suspend

Sector Erase

B0h@

XXXXh

Resume

Sector Erase

30h@

XXXXh

Reset

F0h@

XXXXh

Unlock Bypass 1

AAh@

X555h

55h@

XAAAh

20h@

X555h

Unlock Bypass

Program

A0h@

XXXXh

PD@ PA

Unlock Bypass

Reset

90h@

XXXXh

00h@

XXXXh

PSD8XXF2/3/4/5

20/103

INSTRUCTIONS

An instruction consists of a sequenc e of specific

operations. Each received byte is sequentially de-

coded by the PSD8XXFX and not executed as a

standard WRITE operation. The instruction is exe-

cuted when the correct number of bytes are prop-

erly received and the time between two

consecutive bytes is shorter t han the tim e-out pe-

riod. Some instructions are structured to include

READ operations after the initial WRITE opera-

tions.

The instruction must be followed exactly. A ny in-

valid combination of instruction bytes or time-out

between two consecutive by tes while addressing

Flash memory reset s the device logic into REA D

Mode (Flash memory is read like a ROM device).

The PSD8XXFX supports the instructions summa-

rized in Table 8:

Flash memory:

■ Erase memory by chip or sector

■ Suspend or resume sector erase

■ Program a Byte

■ Reset to READ Mode

■ Read primary Flash Identifier value

■ Read Sector Protection Status

■ Bypass (on the PSD833F2, PSD834F 2,

PSD853F2 and PSD854F2)

These instructions are detailed in Table 8. F or ef-

ficient decoding of the instructions, the first two

bytes of an instruct ion are the coded cycles and

are followed by an instruction byte or confirmation

byte. The coded cycles consist of writing the data

AAh to address X555h during the first cycle and

data 55h to address XAAAh during the second cy-

cle. Address signals A15-A12 are Do n’t Care dur-

ing the instruction WRITE cycles. However, the

appropriate Sector Select (FS0-FS7 or

CSBOOT0-CSBOOT3 ) m ust be selected.

The primary and secondary Flash memories have

the same instruction set (except for Read Primary

Flash Identifier). The Sector Select signals deter-

mine which Flash memory is to receive and exe-

cute the instruction. The primary Flash memory is

selected if any one of Sector Select (FS0-FS7) is

High, and the secondary Flash memory is selected

if any one of Sector Select (CSBOOT0-

CSBOOT3) is High.

Power-down Instruction and Power-up Mode

Power-up Mode. The PSD8XXFX internal logic

is reset upon Power-up to the READ Mode. Sector

Select (FS0-FS7 and CSBOOT0-CSBOOT3)

must be held Low, and Write Strobe (WR

, CNTL0)

High, during Power-up for maximum security of

the data contents and to remove the poss ibility of

a byte being written on the first edge of Write

Strobe (WR

, CNTL0). Any WRITE cycle initiation

is locked when V

is below V

LKO

READ

Under typical conditions, the MCU may read t he

primary Flash memory or the secondary Flash

memory using READ operations just as it would a

ROM or RAM device. Alternately, the MCU may

use READ operations to ob tain status inform at ion

about a Program or Erase cycle that is currently in

progress. Lastly, the MCU may use instructions to

read special data from these memory blocks. The

following sections describe these READ functions.

Read Memory Contents. Primary Flash memor y

and secondary Flash memory are placed in the

READ Mode after Power-up, chip reset, or a Reset

Flash instruction (see Table 8). The MCU can read

the memory contents of the primary Flash memory

or the secondary Flash memory by using RE AD

operations any time the READ operation is not

part of an instruction.

Read Primary Flash Identifier. The primary

Flash memory identifier is read with an instruction

composed of 4 operations: 3 specific WRITE oper-

ations and a RE AD operation (see Table 8). Dur-

ing the READ operation, address bits A6, A1, and

A0 must be 0,0,1, respectivel y, and the appropri-

ate Sector Select (FS0-FS7) must be High. The

identifier for the PSD813F2/3/4/5 is E4h, and for

the PSD83xF2 or PSD85xF2 it is E7h.

Read Memory Sector Protection Status. The

primary Flash memory Sector Protection Status is

read with an instruction composed of 4 operations:

3 specific WRITE operations and a READ opera-

tion (see Table 8). During the READ operation, ad-

dress bits A6, A1, and A0 must be 0,1,0,

respectively, while Sector Select (FS0-FS7 or

CSBOOT0-CSBOOT3) designates the Flash

memory sector whose protection has to be veri-

fied. The READ operation produces 01h if the

Flash memory sector is protected, or 00h if the

sector is not protected.

The sector protection status for all NVM blocks

(primary Flash memory or secondary Flash mem-

ory) can also b e read by the M CU accessing the

Flash Protection registers in PSD I/O space. See

the section entitled “Flash Memory Sector Pro-

tect”, on page 25, for register definitions.

21/103

PSD8XXF2/3/4/5

Reading the Erase/Program Status Bits. The

PSD8XXFX provides several status bits to be

used by the MCU to confirm th e completion of an

Erase or Program cycle of Flash memory. These

status bits minimize the time that the M CU spends

performing these tasks and are defined in Table 9.

The status bits can be read as many times as

needed.

For Flash memory, the MCU can perform a READ

operation to obtain these status bits while an

Erase or Program instruction is being executed by

the embedded algo rithm. See the section ent itled

“Programming Flash Memory”, on page 22, for de-

tails.

Data Polling Flag (DQ7). When erasing or pro-

gramming in Flash memory, the Data Polling Flag

(DQ7) bit outputs the compl em ent of the bit bei ng

entered for programming/writing on the DQ7 bit.

Once the Program instruction or the WRITE oper-

ation is completed, the true logic value i s read on

the Data Polling Flag (DQ7) bit (in a READ opera-

tion).

■ Data Polling is effective after the fourth WRITE

pulse (for a Program instruction) or after the

sixth WRITE pulse (for an Erase instruction). It

must be performed at the address being

programmed or at an address within the Flash

memory sector being erased.

■ During an Erase cycle, the Data Pollin g Flag

(DQ7) bit outputs a 0. After completion of the

cycle, the Data Polling Flag (DQ7) bit outputs

the last bit programmed (it is a 1 after erasing).

■ If the byte to be programmed is in a protected

Flash memory sector, the instruction is ignored.

■ If all the Flash memory sectors to be erased are

protected, the Data Po lling Flag (DQ7) b it is

reset to 0 for about 100µs, and then returns to

the previous addressed byte. No erasure is

performed.

Toggle Fla g (D Q6) . The PSD8XXFX offers an-

ot her wa y f or de t er m in in g wh en t h e F lash memory

Program cycle is completed. During the internal

WRITE operation and when either the FS0-FS7 or

CSBOOT0-CSBOOT3 is true, the Toggle Flag

(DQ6) bit toggles from 0 to 1 and 1 to 0 on subse-

quent attempts to read any byte of the memory.

When the internal cycle is complete, the toggling

stops and the data read on the Data Bus D0-D7 is

the addressed memory byte. The device is now

accessible for a new READ or WRITE operation.

The cycle is finished when two successive READs

yield the same output data.

■ The Toggle Flag (DQ6) bit is effective after the

fourth WRITE pulse (for a Program instruction)

or after the sixth WRITE pulse (for an Erase

instruction).

■ If the byte to be programmed belongs to a

protected Flash memory sector, the instruction

is ignored.

■ If all the Flash memory sectors selected for

erasure are protected, the Toggle Flag (DQ6) bit

toggles to 0 for about 100µs and then returns to

the previous addressed byte.

Error Flag (DQ5). During a normal Program or

Erase cycle, the Error Flag (DQ5) bit is to 0. This

bit is set to 1 when there is a failure during Flash

memory Byte Program, Sector Erase, or Bulk

Erase cycle.

In the case of Flash memory programming, the Er-

ror Flag (DQ5) bit indicates the attempt to program

a Flash memory bit from the programmed state, 0,

to the erased state, 1, which is not valid. The Error

Flag (DQ5) bit may also indicate a Time-out condi-

tion while attempting to program a byte.

In case of an error in a Flash memory Sector Erase

or Byte Prog ram cycle, th e Flash memory sector i n

which the error occurred or to which the pro-

grammed byte bel ongs must no longer be used.

Other Flash memory sectors may still be used.

The Error Flag (DQ5) bit is reset after a Reset

Flash instruction.

Erase Time-out Flag (DQ3). The Erase Time-

out Flag (DQ3) bit reflects the time-out period al-

lowed between two consecutive S ector Erase in-

structions. The Erase Time-out Flag (DQ3) bit is

reset to 0 after a Sector Erase cycle for a time pe-

riod of 100µs + 20% unless an additional Sector

Erase instruction is decoded. After this time peri-

od, or when the additional Sector Erase instruction

is decoded, the Eras e Time-out Flag (DQ3) bit is

set to 1.

Table 9. Status Bit

Note: 1. X = Not guaranteed value , c an be read either 1 or 0.

2. DQ7-DQ0 represent the Data Bus bits, D7-D0.

3. FS0-FS 7 and CSBOO T 0-CSBOOT 3 are active High.

Functional Block

FS0-FS7/CSBO OT0-

CSBOOT3

DQ7 DQ6 DQ5 DQ4 DQ3 DQ2 DQ1 DQ0

Flash Memory

Data

Polling

Toggle

Flag

Error

Flag

Erase

Time-

out

XXX

PSD8XXF2/3/4/5

22/103

Programming Flash Memory

Flash memory must be erased prior to being pro-

grammed. A byte of Flash memory is erased to all

1s (FFh), and is programmed by setting selected

bits to 0. The MCU may erase Fl ash memory all at

once or by-sector, but not byte-by-byte. Howe ve r,

the MCU may program Flash memory byte-by-

byte.

The primary and secondary Flash memories re-

quire the MCU to send an instruction to program a

byte or to erase sectors (see Table 8).

Once the MCU issues a Flash memory Program or

Erase instruction, it must check for the status bits

for completion. The embedded algorithms that are

invoked inside the PSD8XXFX support several

means to provide status to the MCU. Status may

be checked using any of three methods: Data Poll-

ing, Data Toggle, or Ready/Busy

(PC3).

Data Polling. Polling on the Data Polling Flag

(DQ7) bit is a method of checking whether a P ro-

gram or Erase cycle is in progress or has complet-

ed. Figure 5 shows the Data Polling algorithm.

When the MCU i ssues a Program i nstruction, the

embedded algorithm within the PSD8XXFX be-

gins. The MCU then reads the location of the byte

to be programmed in Flash memory to check sta-

tus. The Data Polling Flag (DQ7) bit of this location

becomes the complement of b7 of the original data

byte to be programmed. The MCU continues to

poll this location, comparing the Dat a P olling Fl ag

(DQ7) bit and monitoring the Error Flag (DQ5) bit.

When the Data Polling Flag (DQ7) bit matches b7

of the original data, and the E rror Flag (DQ5) bit

remains 0, the embedded algorithm is complete. If

the Error Flag (DQ5) bit is 1, the MCU should test

the Data Polling Flag (DQ7) bit again since the

Data Polling Flag (DQ7) bit may have changed si-

multaneously with the Error Flag (DQ5) bit (see

Figure 5).

The Error Flag (DQ5) bit is set if either an internal

time-out occurred while the embedded algorithm

attempted to program the byte or if the MCU at-

tempted to program a 1 to a bit that was not erased

(not erased is logic 0).

It is suggested (as with all Flash memories) to read

the location again after the embedded program-

ming algorithm has completed, to compare the

byte that was written to the Flash memory with the

byte that was intended to be written.

When using the Data Polling method during an

Erase cycle, Figure 5 still applies. However, the

Data Polling Flag (DQ7) bit is 0 until the Erase cy-

cle is complete. A 1 on the Error Flag (DQ5) bit in-

dicates a time-out condition on the Erase cycle; a

0 indicates no error. The MCU can read any loca-

tion within the sector being erased to get the Data

Polling Flag (DQ7) bit and the Error Flag (DQ5) bit.

PSDsoft Express generates ANSI C code func-

tions which implement these Data Polling algo-

rithms.

Figure 5. Dat a Polling Flo wchart

READ DQ5 & DQ7

at VALID ADDRESS

START

READ DQ7

FAIL PASS

AI01369B

DQ7

DATA

YES

DQ5

= 1

DQ7

DATA

YES

23/103

PSD8XXF2/3/4/5

Data Toggle . Checking the Toggle Flag (DQ6) bit

is a method of determining wh ether a Program or

Erase cycle is in progress or has completed. Fig-

ure 6 shows the Data Toggle algorithm.

When the MCU i ssues a Program instruction, the

embedded algorithm within the PSD8XXFX be-

gins. The MCU then reads the location of the byte

to be programmed in Flash memory to check sta-

tus. The Toggle Flag (DQ6) bit of this location tog-

gles each time the MCU reads this locat ion until

the embedded algorithm is complete. The MCU

continues to read this location, chec king the Tog-

gle Flag (DQ6) bit and monitoring the Error Flag

(DQ5) bit. When the Toggle Flag (DQ6) bi t stops

toggling (two consecutive reads yield the same

value), and the Error Flag (DQ5) bit remains 0, the

embedded algorithm is complete. If the Error Flag

(DQ5) bit is 1, the MCU should test the Toggle

Flag (DQ6) bit again, since the Toggle Flag (DQ6)

bit may have changed simultaneously with the Er-

ror Flag (DQ5) bit (see Figure 6).

Figure 6. Dat a Toggle Flowchart

The Error Flag (DQ5) bit is set if either an internal

time-out occurred while the embedded algorithm

attempted to program the byte, or if the MCU at-

tempted to program a 1 to a bit that was not erased

(not erased is logic 0).

It is suggested (as with all Flash memories) to read

the location again after the embedded program-

ming algorithm has completed, to compare the

byte that was written to Flash memory with the

byte that was intended to be written.

When using the Data Toggle method after an

Erase cycle, Figure 6 still applies. the Toggle Flag

(DQ6) bit toggles until the Erase cycle is complete.

A 1 on the Error Flag (DQ5) bit indicates a time-out

condition on the Erase cycle; a 0 indicates no er-

ror. The MCU can read any location within the sec-

tor being erased to get the Toggle Fla g (DQ6) bit

and the Error Flag (DQ5) bit.

PSDsoft Express generates ANSI C code func-

tions which implement these Data T oggling algo-

rithms.

Unlock Bypass (PSD833F2x, PSD834F2x,

PSD853F2x, PSD854F2x). The Unlock Bypass

instructions allow the system to program bytes to

the Flash memories faster than using the standard

Program instruction. The Unlock Bypass mode is

entered by fi rst ini tiati ng two Unl ock cycle s. This is

followed by a third WRITE cycle containing the Un-

lock Bypass code, 20h (as shown in Table 8).

The Flash memory then enters the Unlock Bypass

mode. A two-cycle Unlock Bypass Program in-

struction is all that is required t o program in this

mode. The first cycle in this instruction contains

the Unlock Bypass Program code, A0h. The sec-

ond cycle contains the program address and data.

Additional data is programm ed in the same man-

ner. These instructions dispense with the initial

two Unlock cycles required in the standard Pro-

gram instruction, resulting in faster total Flash

memory programming.

During the Unlock Bypass mode, only the Unlock

Bypass Program and Unlock Bypass Reset Flash

instructions are valid.

To exit the Un l o ck Bypass mode, the system mus t

issue the two -cycle Un lock Bypass Reset F lash in-

struction. The first cycle must contain the data

90h; the second cycle the data 00h. Addresses are

Don’t Care for both cycles. The Flash memory

then returns to READ Mode.

READ

DQ5 & DQ6

START

READ DQ6

FAIL PASS

AI01370B

DQ6

TOGGLE

YES

DQ5

= 1

YES

DQ6

TOGGLE

PSD8XXF2/3/4/5

24/103

Erasing Flash Memory

Flash Bulk Erase. The Flash Bulk E rase instruc-

tion uses six WRITE operations followed by a

READ operation of the status register, as de-

scribed in Table 8. If any byte of the Bulk Er ase in-

struction is wrong, the Bulk Erase instruction

aborts and the device is reset t o the Read Flash

memory status.

During a Bulk Erase, the memory status may be

checked by reading the Error Flag (DQ5) bit, the

Toggle Flag (DQ 6) bit, and the Data Polling Flag

(DQ7) bit, as detailed in the section entitled “Pro-

gramming Flash Memory”, on page 22. The Error

Flag (DQ5) bit returns a 1 if there has been an

Erase Failure (maximum number of Erase cycles

have been executed).

It is not necessary to program the memory with

00h because the PSD8X XFX automatically does

this before erasing to 0FFh.

During execution of the Bulk Erase instruction, the

Flash memory does not accept any instructions.

Flash Sector Erase. The Sector Erase instruc-

tion uses six WRITE operations, as descr ibed in

Table 8. Additional Flash Sector Erase codes and

Flash memory sector addresses can be written

subsequently to erase other Flash memory sec-

tors in parallel, without further coded cycles, if the

additional bytes are transmitted in a shorter time

than the time-out period of about 100µs. The input

of a new Sector Erase code restarts the time-out

period.

The status of the internal timer can be m onitored

through the level of the Erase Time-out Flag (DQ3)

bit. If the Erase Time-out Flag (DQ3) bit is 0, the

Sector Erase instruction has been received and

the time-out period is counting. If the E rase Time-

out Flag (DQ3) bit is 1, the time-out period has ex-

pired and the PSD8XXFX is busy erasing the

Flash memory sector(s). Before and during Erase

time-out, any instruction other than Suspend Sec-

tor Erase and Resume Sector Erase instructions

abort the cycle that is currently in progress, and re-

set the device to READ Mode. It is not necessary

to program the Flash m emory sector with 00 h as

the PSD8XXFX does this automatically before

erasing (byte = FFh).

During a Sector Erase, the memory status may be

checked by reading the Error Flag (DQ5) bit, the

Toggle Flag (DQ 6) bit, and the Data Polling Flag

(DQ7) bit, as detailed in the section entitled “Pro-

gramming Flash Memory”, on page 22.

During execution of the Erase cycle, the Flash

memory accepts only Reset and Suspend Sector

Erase instructions. Erasure of one Flash memory

sector may be suspended, in order to read data

from another Flash memory se ctor, and then re-

sume d.

Suspend Sector Erase. When a Sector Erase

cycle is in progress, the Suspend Sector Erase in-

struction can be used to suspend the cycle by writ-

ing 0B0h to any address when an appropriate

Sector Se lect (F S0-FS7 o r CSBOOT0- CSBOOT3)

is High. (See Table 8). This allows reading of data

from another Flash memory sector after the Erase

cycle has been suspended. Suspend Sector

Erase is accepted only during an Er ase cycle and

defaults to READ Mode. A Suspend Sector Erase

instruction executed during an Erase time-out pe-

riod, in addition to suspending the Erase cycle, ter-

minates the time out period.

The Toggle Flag (DQ6) bit stops toggling when the

PSD8XXFX internal logic is suspended . The sta-

tus of this bit must be monitored at an address

within the Flash memory sector being erased. The

Toggle Flag (DQ6) bit stops toggling between

0.1 µ s a nd 15 µs a fter the Suspend S ector Erase

instruction has been executed. The PSD8XXFX is

then automatically set to READ Mode.

If an Suspend Sector Erase instruction was exe-

cuted, the following rules apply:

– Attempting to read from a Flash memory sector

that was being erased outputs invalid data.

– Reading from a Flash sector that was

not

being

erased is valid.

– The Flash memory

cannot

be programmed, and

only responds to Resume Sector Erase and

Reset Flash instructions (READ is an operation

and is allowed).

– If a Reset Flash instruction is received, data in

the Flash memory sector that was being erased

is invalid .

Resume Sector Erase. If a Suspend Sector

Erase instruction was previously executed, the

erase cycle may be resumed with this instruction.

The Resume Sector E rase instruction consists of

writing 030h to any address while an appropriate

Sector Se lect (F S0-FS7 o r CSBOOT0- CSBOOT3)

is High. (See Table 8.)

25/103

PSD8XXF2/3/4/5

Specific Features

Flash Memory Sector Protect. Each primary

and secondary Flash memory sector can be sepa-

rately protected against Program and Erase cy-

cles. Sector Protection provides additional data

security because it disables all Program or Erase

cycles. This mode can be activated through the

JTAG Port or a Device Programmer.

Sector protection can be selec ted for each sector

using the PSDsoft Express Configuration pro-

gram. This automatically protects selected sectors

when the device is programmed through the JTAG

Port or a Device Programmer. Flash memory sec-

tors can be unprotecte d to allow updating of t heir

contents using the JTAG Port or a Device Pro-

grammer. The MCU can read (but cannot change)

the sector protection bits.

Any attempt to program or erase a protected Flash

memory sector is ignored by the device. The Verify

operation results in a READ of the protected data.

This allows a guarantee of the retention of the Pro-

tection status.

The sector protection status can be read by the

MCU through the Flash memory protection and

PSD/EE protection registers (in the CSIOP block).

See Table 10 and Table 11.

Table 10. Sector Protection/Security Bit Definition – Flash Protection Register

Note: 1. Bit De fi nitions:

Sec_Prot 1 = Primary Flash memory or secondary Flash memory Sector is write protected.

Sec_Pr ot 0 = Primary Flash mem ory or secondary Flash mem ory Sector is not write protected.

Table 11. Sector Protection/Security Bit Definition – PSD/EE Protection Register

Note: 1. Bit De fi nitions:

Sec_Prot 1 = Secondary Flash memory Sector is write protected.

Sec_Pr ot 0 = Secondary Flash memory Sector is not write protected.

Security_Bit 0 = Security Bit in device has not been set.

1 = Security B i t in device has been set.

Reset Flash. The Reset Flash instruction con-

sists of one WRITE cycle (see Table 8). It can also

be optionally preceded by the standard two

WRITE decoding cycles (writing AAh to 555h and

55h to AAAh). It must be executed after:

– Reading the Flash Protection Status or Flash ID

– An Error condition has occurred (and the device

has set the Error Flag (DQ5) bit to 1) during a

Flash memory Program or Erase cycle.

On the PSD813F2 /3/4/5, the Reset Fla sh instruc-

tion puts the Flash memory back into normal

READ Mode. It ma y take the Flash memory up t o

a few milliseconds to complete the Reset cycle.

The Reset Flash instruction is ignored when it is is-

sued during a Pr ogram o r Bulk E ras e cycle of t he

Flash memory. The Reset Flash instruction aborts

any on-going Sector Erase cycle, and returns the

Flash memory to the normal READ Mode within a

few millis e co n ds .

On the PSD83xF2 or PSD85xF2, t he Reset Flash

instruction puts the Flash m emory back into nor-

mal READ Mode. If an Error condition has oc-

curred (and the device has set the Error Flag

(DQ5) bit to 1) the Flash m emory is p ut back into

normal READ Mode within 25 µs of the Reset

Flash instruction having been issued. The Reset

Flash instruction is ignored when it is issued dur-

ing a Program or Bulk Erase cycle of the Flash

memory. The Reset F lash instruction aborts any

on-going Sector Erase cycle, and returns the

Flash memory to the normal READ Mode within

25 µs.

Reset (RESET

) Signal (on the PSD83xF2 and

PSD85 xF2). A pulse on Reset (RESET

) aborts

any cycle that is in progress, and resets the Flash

memory to the READ Mode. When the reset oc-

curs during a Program or Erase cycle, the Flash

memory takes up to 25 µs to return to the READ

Mode. It is recommended that the Reset (RESET

)

pulse (except for Power On Reset, as described

on page 63) be at least 25µs so that the Flash

memory is always ready for the MCU to fetch the

bootstrap instructions after the Reset cycle is com-

plete.

Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0

Sec7_Prot Sec6_Prot Sec5_Prot Sec4_Prot Sec3_Prot Sec2_Prot Sec1_Prot Sec0_Prot

Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0

Security_Bit not used not used not used Sec3_Prot Sec2_Prot Sec1_Prot Sec0_Prot

PSD8XXF2/3/4/5

26/103

SRAM

The SRAM is enab led when SRAM Select (RS0)

from the DPLD is High. SRAM Select (RS0) can

contain up to two prod uct terms, allow ing flexible

memory ma pping.

The SRAM can be backed up using an external

battery. The external battery should be connected

to Voltage Stand-by (V

STBY

, PC2). If you have an

external battery connected to the PSD8XXFX, the

contents of the SRAM are retained i n the event of

a power loss. The contents of the SRAM are re-

tained so long as the battery voltage remains at

2 V or greater. If the supply voltage falls below the

battery voltage, an internal power switch-over to

the battery occurs.

PC4 can be configured as an output that indicates

when power is being drawn from the ext ernal ba t-

tery. Battery-on Indicator (VBATON, PC 4) is Hi gh

with the supply voltage falls below the battery volt-

age and the battery on Voltage Stand-by (V

STBY

PC2) is supplying power to the internal SRAM.

SRAM Select (RS0), Voltage Stand-by (V

STBY

PC2) and Battery-on Indicator (VBATON, PC4)

are all configured using PSDsoft Express Configu-

ration.

Sector Select and SRAM Select

Sector Select (FS0-FS7, CSBOOT0-CSBOOT3)

and SRAM Select (RS0) are all outputs of the

DPLD. They are setup by writing equations for

them in PSDabel . The foll owing rules apply to the

equations for these signals:

1. Primary Flash memory and secondary Flash

memory Sector Select signals must

not

larger than the physical sector size.

2. Any primary Flash memory sector must

not

mapped in the same memory space as another

Flash memory sector.

3. A secondary Flash memory sector must

not

mapped in the same memory space as another

secondary Flash memory sector.

4. SRAM, I/O, and Peripheral I/O spaces must

not

overlap.

5. A secondary Flash memory sector

may

overlap

a primary Flash memory sector. In case of

overlap, priority is given to the secondary Flash

memory sector.

6. SRAM, I/O, and Peripheral I/O spaces

may

overlap any other memory sector. Priority is

given to the SRAM, I/O, or Peripheral I/O.

Example. FS0 is valid when the address is in the

range of 8000h to BFFFh, CSBOOT0 is valid from

8000h to 9FFF h, and RS0 i s valid from 8000 h to

87FFh. Any addres s in the range of RS0 always

accesses the SRAM. Any address in the range of

CSBOOT0 greater than 87FFh (and less than

9FFFh) automatically addresses secondary Flash

memory segment 0. Any address greater than

9FFFh accesses the prima ry Flash memory seg-

ment 0. You can see that half of the primary Flash

memory segment 0 and o ne-fourth of secondary

Flash memory segment 0 cannot be accessed in

this example. Also no te that an equ ation that de-

fined FS1 to anywhere in the range of 8000h to

BFFFh would

not

be valid.

Figure 7 shows the priority levels for all memory

components. Any component on a higher level can

overlap and has priority over any component on a

lower level. Components on the same level must

not

overlap. Level one has the highest priority and

level 3 has the lowest.

Figure 7. Priority Level of Memory and I/O

Components

Level 1

SRAM, I/O, or

Peripheral I/O

Level 2

Secondary

Non-Volatile Memory

Highest Priority

Lowest Priority

Level 3

Primary Flash Memory

AI02867D

27/103

PSD8XXF2/3/4/5

Memory Select Configuration for MCUs with

Separate Program and Data Spaces. The 8031

and compatible family of MCUs, which includes

the 80C51, 80C151, 80C251, and 80C51XA, have

separate address spaces for Program memory

(selected using Program Select Enable (PSEN

CNTL2)) and Data memory (selected using Read

Strobe (RD

, CNTL1)). Any of the memories within

the PSD8XXFX can reside in either space or both

spaces. This is controlled through manipulation of

the VM register that resides in the CSIOP space.

The VM register is set using PSDsoft Express to

have an initial value. It can subsequently be

changed by the MCU so that memory mapping

can be changed on-the-fly.

For example, you may wish to have SRAM and pri-

mary Flash memory in the Data space at Boot-up,

and secondary Flash memory in the Program

space at Boot-up, and later swap the prima ry and

secondary Flash memories. This is easily done

with the VM register by using PSDsoft Express

Configuration to configure it for Boot-up and hav-

ing the MCU change it when desired. Table 12 de-

scribes the VM Register.

Table 12. VM Register

Configuration Modes for MCUs with Separate

Program and Data Spaces. Separate Space

Modes. Program space is separated from Data

space. For example, Program Select Enable

(PSEN

, CNTL2) is used to access the program

code from the p rimary Flash m emory, whi le Read

Strobe (RD

, CNTL1) is used to access data from

the secondary Flash memory, SRAM and I/O Port

blocks. This configuration requires the VM register

to be set to 0Ch (see Figure 8).

Figure 8. 8031 Memory Modules – Separate S pac e

Bit 7

PIO_EN

Bit 6 Bit 5

Bit 4

Primary

FL_Data

Bit 3

Secondary

EE_Data

Bit 2

Primary

FL_Code

Bit 1

Secondary

EE_Code

Bit 0

SRAM_Code

0 = disable

PIO mode

not used not used

0 = RD

can’t

access

Flash

memory

0 = R

D can’t

access Secondary

Flash memory

0 = PSEN

can’t

access

Flash

memory

0 = PSE

N can’t

access Secondary

Flash memory

0 = PSEN

can’t

access

SRAM

1= enable

PIO mode

not used not used

1 = RD

access

Flash

memory

1 = R

D access

Secondary Flash

memory

1 = PSEN

access

Flash

memory

1 = PSE

N access

Secondary Flash

memory

1 = PSEN

access

SRAM

Primary

Flash

Memory

DPLD

Secondary

Flash

Memory

SRAM

RS0

CSBOOT0-3

FS0-FS7

CS CSCS

OE OE

PSEN

AI02869C

PSD8XXF2/3/4/5

28/103

Combined Space Modes. The Program and

Data spaces are combined into one memory

space that allows the primary Flash memory, sec-

ondary Flash memory, and SRAM to be accessed

by either Program Select Enable (PSEN

, CNTL2)

or Read Strobe (RD

, CNTL1). For example, to

configure the primary Flash mem ory in Combi ned

space, bits b2 and b4 of the VM register are set to

1 (see Figure 9).

Figure 9. 8031 Memory Modules – Combine d Space

Primary

Flash

Memory

DPLD

Secondary

Flash

Memory

SRAM

RS0

CSBOOT0-3

FS0-FS7

CS CSCS

OE OE

VM REG BIT 2

PSEN

VM REG BIT 0

VM REG BIT 1

VM REG BIT 3

VM REG BIT 4

AI02870C

29/103

PSD8XXF2/3/4/5

Page Regi st er

The 8-bit Page Register increases the addressing

capability of the MCU by a factor of up to 256. The

contents of the register can also be read by the

MCU. The outputs of the Page R egister (PGR0-

PGR7) are inputs to the DPLD decoder and can be

included in the Sector Select (FS0-FS7,

CSBOOT0-CSBOOT3 ), and SRAM Select (RS0)

equations.

If memory paging is not needed, or if not all 8 page

these bits may be used in the CPLD f or general

logic. See Application Note

AN1154

Figure 10 shows the Page Register. The eight flip-

flops in the register are connected to the internal

data bus D0-D7. The MCU can write to or read

from the Page Register. The Page Register can be

accessed at address location CSIOP + E0h.

Figure 10. Page Register

RESET

D0-D7

R/W

D0 Q0

PAGE

PGR0

PGR1

PGR2

PGR3

DPLD

AND

CPLD

INTERNAL

SELECTS

AND LOGIC

PLD

PGR4

PGR5

PGR6

PGR7

AI02871B

PSD8XXF2/3/4/5

30/103

PLDS

The PLDs bring programmable l ogic functionality

to the PSD8XXFX. After specifying the logic for the

PLDs using the PSDabel tool in PSDsoft Express,

the logic is programmed into the device and avail-

able upon Power-up.

The PSD8XXFX con tains two PLDs: the Decode

PLD (DPLD), and the Co mplex P LD (CP LD). T he

PLDs are briefly discussed in the next few para-

graphs, and in mo re detail in the section entitled

“Decode PLD (DPLD)”, on page 32, and the sec-

tion entitled “Complex PLD (CPLD)”, also on page

33. Figure 11 shows the configuration of the PLDs.

The DPLD performs add ress decoding for S elect

signals for internal components, such as memory,

registers, and I/O ports.

The CPLD can be used for logic functions, such as

loadable counters and shift registers, state ma-

chines, and encoding and decoding logic. These

logic functions can be constructed using the 16

Output Macrocells (OMC), 24 Input Macrocells

(IMC), and the AND Array. The CPLD can also be

used to generate External Chip Select (ECS0-

ECS2) signals.

The AND Array is used to form product terms.

These product terms are specified using PSDabel.

An Input Bus consisting of 73 signals is connected

to the PLDs. The signals are shown in Table 13.

The Turbo Bit in PS D8 X X FX

The PLDs in the PSD8XXFX can minimize power

consumption by switc hing off when i nputs rema in

unchanged for an extended time of about 70ns.

Resetting the Turbo bit to 0 (Bit 3 of PMMR0) au-

tomatically places the PLDs into standby if no in-

puts are changing. Turning the Turbo mode off

increases propagation delays while reducing pow-

er consumption. See the section entitled “POWER

MANAGEMENT”, on page 58, on how to set the

Turbo bit.

Additionally, five bits are available in PMMR2 to

block MCU control signals from entering the PLDs.

This reduces power consumption and can be used

only when these MCU control signals are not used

in PLD logic equations.

Each of the two PLDs has unique characteristics

suited for its applications. They are described in

the following sections.

Table 13. D PL D and C P LD I npu t s

Note: 1. The addres s i nputs are A19-A4 in 80C51XA mode.

Input Source Input Name

Number

Signals

MCU Address Bus

A15-A0 16

MCU Control Signals CNTL2-CNTL0 3

Reset RST

Power-down PDN 1

Port A Input

Macrocells

PA7-PA0 8

Port B Input

Macrocells

PB7-PB0 8

Port C Input

Macrocells

PC7-PC0 8

Port D Inputs PD2-PD0 3

Page Register PGR7-PGR0 8

Macrocell AB

Feedback

MCELLAB.FB7-

FB0

Macrocell BC

Feedback

MCELLBC.FB7-

FB0

Secondary Flash

memory Program

Status Bit

Ready/Busy

+ 73 hidden pages