Philips PXAS37KBBE, PXAS30KBA, PXAS30KBBE, PXAS33KBBE Datasheet

INTEGRATED CIRCUITS

XA-S3

XA 16-bit microcontroller

32K/1K OTP/ROM/ROMless, 8-channel 8-bit A/D,

low voltage (2.7 V–5.5 V), I 16MB address range

Preliminary specification Supersedes data of 1998 Oct 06 IC25 Data Handbook

C, 2 UARTs,

1999 Oct 05

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Philips Semiconductors Preliminary specification

XA 16-bit microcontroller

32K/1K OTP/ROM/ROMless, 8-channel 8-bit A/D, low voltage (2.7 V–5.5 V), I2C, 2 UARTs, 16 MB address range

XA-S3

GENERAL DESCRIPTION

The XA-S3 device is a member of Philips Semiconductors’ XA (eXtended Architecture) family of high performance 16-bit single-chip microcontrollers.

The XA-S3 device combines many powerful peripherals on one chip. With its high performance A/D converter, timers/counters, watchdog, Programmable Counter Array (PCA), I UARTs, and multiple general purpose I/O ports, it is suited for general multipurpose high performance embedded control functions.

C interface, dual

Specific features of the XA-S3

•2.7 V to 5.5 V operation.

•32 K bytes of on-chip EPROM/ROM program memory.

•1024 bytes of on-chip data RAM.

•Supports off-chip addressing up to 16 megabytes (24 address

lines). A clock output reference is added to simplify external bus interfacing.

•High performance 8-channel 8-bit A/D converter with automatic

channel scan and repeated read functions. Completes a conversion in 4.46 microseconds at 30 MHz. Alternate operating mode allows 10-bit conversion results.

•Three standard counter/timers with enhanced features. All timers

have a toggle output capability.

•Watchdog timer .

•5-channel 16-bit Programmable Counter Array (PCA).

•I

C-bus serial I/O port with byte-oriented master and slave

functions.

•Two enhanced UARTs with independent baud rates.

•Seven software interrupts.

•Active low reset output pin indicates all reset occurrences

(external reset, watchdog reset and the RESET instruction). A reset source register allows program determination of the cause of the most recent reset.

•50 I/O pins, each with 4 programmable output configurations.

•30 MHz operating frequency at 2.7–5.5 V V

operating conditions.

•Power saving operating modes: Idle and Power-down. Wake-up

from power-down via an external interrupt is supported.

•68-pin PLCC and 80-pin PQFP packages.

ORDERING INFORMATION

ROMless ROM EPROM TEMPERATURE RANGE (°C)

PXAS30KBA PXAS33KBA PXAS37KBA OTP 0 to +70,

68-pin Plastic Leaded Chip Carrier

PXAS30KBBE PXAS33KBBE PXAS37KBBE OTP 0 to +70,

80-pin Plastic Low Profile Quad Flat Pack

AND PACKAGE

over commercial

FREQ.

(MHz)

30 SOT188-3

30 SOT315-1

DRAWING

NUMBER

1999 Oct 05

Philips Semiconductors Preliminary specification

XA 16-bit microcontroller

32K/1K OTP/ROM/ROMless, 8-channel 8-bit A/D, low voltage (2.7 V–5.5 V),

C, 2 UARTs, 16 MB address range

PIN CONFIGURATIONS 68-pin PLCC package

P4.0/ECI

AVDDAV

P1.0/A0/WRH

XTAL1

37 3828 29

P1.1/A1

XTAL2

P2.7/A19D15

P2.6/A18D14

39 40 41 42 43

P1.3/A3

P1.2/A2

P1.4/RxD1

P4.7/A21

P3.0/RxD0

P3.1/TxD0

P3.2/INT0 P3.3/INT1

P3.4/T0

P3.5/T1/BUSW

P3.6/WRL

P3.7/RD

RSTOUT

V V

EA/WAIT/V

P5.0/AD0 P5.1/AD1 P5.2/AD2 P5.3/AD3

P4.6/A20

P4.5/CEX4

P4.4/CEX3

P4.3/CEX2

P4.2/CEX1

P4.1/CEX0

765432168 6798 66 65 64 63 62 10 11 12 13 14 15 16 17 18 19 20

23 24 25 26

P5.5/AD5

P5.4/AD4

PLASTIC LEADED CHIP CARRIER

30 31 32 33 34 35 36

REF–

REF+

P5.6/AD6/SCL

P5.7/AD7/SDA

P2.5/A17D13

P2.4/A16D12

P1.6/T2

P1.5/TxD1

P2.3/A15D11

P2.2/A14D10

P6.0/A22

P1.7/T2EX

P2.1/A13D9

P2.0/A12D8

P0.7/A11D7

P0.6/A10D6

P0.5/A9D5 V

55 54

V P0.4/A8D4

P0.3/A7D3

52 51

P0.2/A6D2 RST

50 49

CLKOUT

PSEN

ALE/PROG

P0.1/A5D1

P0.0/A4D0

P6.1/A23

SU00936

XA-S3

1999 Oct 05

Philips Semiconductors Preliminary specification

XA 16-bit microcontroller

32K/1K OTP/ROM/ROMless, 8-channel 8-bit A/D, low voltage (2.7 V–5.5 V),

C, 2 UARTs, 16 MB address range

80-pin LQFP package

P4.7/A21

P3.0/RxD0

P3.1/TxD0

P3.2/INT0 P3.3/INT1

P3.4/T0

P3.5/T1/BUSW

P3.6/WRL

P3.7/RD

RSTOUT

V V V V

/WAIT/V

P5.0/AD0 P5.1/AD1 P5.2/AD2 P5.3/AD3

P4.0/ECI

P4.1/CEX0

P4.2/CEX1

P4.3/CEX2

P4.4/CEX3

P4.5/CEX4

P4.6/A20

78 77 76 75 74 73 72 71 7080 79 69 68 67 66 65 1 2 3 4 5 6 7 8 9

10 11 12

17 18 19 20

P5.4/AD4

LOW PROFILE PLASTIC QUAD FLAT PACK

AVDDAV

30 3121 22

23 24 25 26 27 28 29

REF–

REF+

P5.5/AD5

P5.6/AD6/SCL

P5.7/AD7/SDA

VSSVSSV

32 33 34 35 36

SSAVSS

P1.0/A0/WRH

XTAL1

P1.1/A1

XTAL2

P1.2/A2

P2.7/A19D15

P1.3/A3

P2.4/A16D12

P2.5/A17D13

P2.6/A18D14

64 63 62 61

37 38 39 40

P1.6/T2

P1.5/TxD1

P1.4/RxD1

P2.2/A14D10

P2.3/A15D11

P6.0/A22

P1.7/T2EX

P2.1/A13D9

P2.0/A12D8

P0.7/A11D7

P0.6/A10D6 P0.5/A9D5

55 54

V V

P0.4/A8D4

50 49

P0.3/A7D3

P0.2/A6D2

RST

CLKOUT

PSEN

ALE/PROG

44 43

P0.1/A5D1

P0.0/A4D0

P6.1/A23

SU00937

XA-S3

1999 Oct 05

Philips Semiconductors Preliminary specification

XA 16-bit microcontroller

32K/1K OTP/ROM/ROMless, 8-channel 8-bit A/D, low voltage (2.7 V–5.5 V),

C, 2 UARTs, 16 MB address range

LOGIC SYMBOL

XA-S3

WRH

RxD1

TxD1

T2EX

/A0

A1 A2 A3

XTAL1

XTAL2

REF+

REF–

CLKOUT

ALE

PSEN

RSTOUT

RST

EA/WAIT

PORT1PORT3

ECI CEX0 CEX1 CEX2

PORT4PORT5PORT6PORT0PORT2

CEX3 CEX4 A20 A21

INPUTS

A22 A23

A/D

SCL SDA

RxD0 TxD0

INT0 INT1

T1/BUSW

WRL

ADDRESS AND DATA BUS

SU00847A

1999 Oct 05

Philips Semiconductors Preliminary specification

XA 16-bit microcontroller

32K/1K OTP/ROM/ROMless, 8-channel 8-bit A/D, low voltage (2.7 V–5.5 V),

C, 2 UARTs, 16 MB address range

BLOCK DIAGRAM

XA-S3

XA CPU Core

Program

Memory

32K Bytes

ROM/EPROM

1024 Bytes Static RAM

Port 0

Port 1

Port 2

Port 3

Port 4

Port 5

Port 6

Bus

Data

Bus

SFR

bus

UART 0

UART 1

I2C

Timer 0, 1

Timer 2

Watchdog

Timer

PCA

Input Port/

A/D

1999 Oct 05

SU00846

Philips Semiconductors Preliminary specification

MNEMONIC

TYPE

NAME AND FUNCTION

XA 16-bit microcontroller

32K/1K OTP/ROM/ROMless, 8-channel 8-bit A/D, low voltage (2.7 V–5.5 V),

C, 2 UARTs, 16 MB address range

PIN DESCRIPTIONS

PIN NUMBER

PLCC LQFP

RST 50 47 I Reset: A low on this pin resets the microcontroller, causing I/O ports and peripherals to

RSTOUT 19 11 O Reset Output: This pin outputs a low whenever the XA-S3 processor is reset for any

ALE/PROG 47 44 I/O Address Latch Enable/Program Pulse: A high output on the ALE pin signals external

PSEN 48 45 O Program Store Enable: The read strobe for external program memory. When the

EA/WAIT/V

XTAL1 68 68 I Crystal 1: Input to the inverting amplifier used in the oscillator circuit and input to the

XTAL2 67 67 I Crystal 2: Output from the oscillator amplifier.

CLKOUT 49 46 O Clock Output: This pin outputs a buffered version of the internal CPU clock. The clock

REF+

REF–

P0.0 – P0.7 45, 46,

1, 20, 55 12, 13,

2, 21, 54 14, 15,

22 16 I External Access/Bus W ait: The EA input determines whether the internal program

33 28, 29 I Analog Power Supply: Positive power supply input for the A/D converter. 34 30, 31 I Analog Ground. 32 27 I A/D Positive Reference Voltage: High end reference for the A/D converter. 31 26 I A/D Negative Reference Voltage: Low end reference for the A/D converter.

51–53,

56–58

53, 54,

69, 70

51, 52,

71, 72

42, 43, 48–50,

55–57

I Ground: 0V reference.

I Power Supply: This is the power supply voltage for normal, idle, and power down

operation.

take on their default states, and the processor to begin execution at the address contained in the reset vector.

reason. This includes an external reset via the RST pin, watchdog reset, and the RESET instruction.

circuitry to latch the address portion of the multiplexed address/data bus. A pulse on ALE occurs only when it is needed in order to process a bus cycle.

microcontroller accesses external program memory, PSEN is driven low in order to enable memory devices. PSEN

memory of the microcontroller is used for code execution. The value on the EA pin is latched as the external reset input is released and applies during later execution. When latched as a 0, external program memory is used exclusively. When latched as a 1, internal program memory will be used up to its limit, and external program memory used above that point. After reset is released, this pin takes on the function of bus WAIT input. If WAIT is asserted high during an external bus access, that cycle will be extended until WAIT is released.

internal clock generator circuits.

output may be used in conjunction with the external bus to synchronize WAIT state generators, etc. The clock output may be disabled by software.

I/O Port 0: Port 0 is an 8-bit I/O port with a user-configurable output type. Port 0 latches have

1s written to them and are configured in the quasi-bidirectional mode during reset. The operation of port 0 pins as inputs and outputs depends upon the port configuration selected. Each port pin is configured independently. Refer to the section on I/O port configuration and the DC Electrical Characteristics for details.

When the external program/data bus is used, Port 0 becomes the multiplexed low data/instruction byte and address lines 4 through 11.

is only active when external code accesses are performed.

XA-S3

1999 Oct 05

Philips Semiconductors Preliminary specification

XA 16-bit microcontroller

32K/1K OTP/ROM/ROMless, 8-channel 8-bit A/D, low voltage (2.7 V–5.5 V),

C, 2 UARTs, 16 MB address range

XA-S3

MNEMONIC NAME AND FUNCTIONTYPE

P1.0 – P1.7

P2.0 – P2.7 59–66 58, 59,

P3.0 – P3.7

P4.0 – P4.7

PIN NUMBER

LQFPPLCC

35–42 32–39 I/O Port 1: Port 1 is an 8-bit I/O port with a user-configurable output type. Port 1 latches have

35 32 O A0/WRH (P1.0) Address bit 0 of the external address bus when the eternal data

36 33 O A1 (P1.1): Address bit 1 of the external address bus. 37 34 O A2 (P1.2): Address bit 2 of the external address bus. 38 35 O A3 (P1.3): Address bit 3 of the external address bus. 39 36 I RxD1 (P1.4): Serial port 1 receiver input. 40 37 O TxD1 (P1.5): Serial port 1 transmitter output. 41 38 I/O T2 (P1.6): Timer/counter 2 external count input or overflow output. 42 39 O T2EX (P1.7): Timer/counter 2 reload/capture/direction control.

I/O Port 2: Port 2 is an 8-bit I/O port with a user-configurable output type. Port 2 latches have

61–66

11–18 3–10 I/O Port 3: Port 3 is an 8-bit I/O port with a user-configurable output type. Port 3 latches have

11 3 I RxD0 (P3.0): Receiver input for serial port 0. 12 4 O TxD0 (P3.1): Transmitter output for serial port 0. 13 5 I INT0 (P3.2): External interrupt 0 input. 14 6 I INT1 (P3.3): External interrupt 1 input. 15 7 I/O T0 (P3.4): Timer/counter 0 external count input or overflow output. 16 8 I/O T1 / BUSW (P3.5): Timer/counter 1 external count input or overflow output. The

17 9 O WRL (P3.6): External data memory low byte write strobe. 18 10 O RD (P3.7): External data memory read strobe.

3–10 73–79, 2 I/O Port 4: Port 4 is an 8-bit I/O port with a user-configurable output type. Port 4 latches have

3 73 I ECI (P4.0): PCA External clock input. 4 74 I/O CEX0 (P4.1): Capture/compare external I/O for PCA module 0. 5 75 I/O CEX1 (P4.2): Capture/compare external I/O for PCA module 1. 6 76 I/O CEX2 (P4.3): Capture/compare external I/O for PCA module 2. 7 77 I/O CEX3 (P4.4): Capture/compare external I/O for PCA module 3. 8 78 I/O CEX4 (P4.5): Capture/compare external I/O for PCA module 4. 9 79 O A20 (P4.6): Address bit 20 of the external address bus.

10 2 O A21 (P4.7): Address bit 21 of the external address bus.

1s written to them and are configured in the quasi-bidirectional mode during reset. The operation of port 1 pins as inputs and outputs depends upon the port configuration selected. Each port pin is configured independently. Refer to the section on I/O port configuration and the DC Electrical Characteristics for details.

Port 1 also provides various special functions as described below:

bus is configured for an 8-bit width. When the external data bus is configured for a 16-bit width, this pin becomes the high byte write strobe.

1s written to them and are configured in the quasi-bidirectional mode during reset. The operation of port 2 pins as inputs and outputs depends upon the port configuration selected. Each port pin is configured independently. Refer to the section on I/O port configuration and the DC Electrical Characteristics for details.

When the external program/data bus is used in 16-bit mode, Port 2 becomes the multiplexed high data/instruction byte and address lines 12 through 19. When the external data/address bus is used in 8-bit mode, the number of address lines that appear on Port 2 is user programmable in groups of 4 bits.

1s written to them and are configured in the quasi-bidirectional mode during reset. The operation of port 3 pins as inputs and outputs depends upon the port configuration selected. Each port pin is configured independently. Refer to the section on I/O port configuration and the DC Electrical Characteristics for details.

Port 3 also provides the various special functions as described below:

value on this pin is latched as an external chip reset is completed and defines the default external data bus width.

1s written to them and are configured in the quasi-bidirectional mode during reset. The operation of Port 4 pins as inputs and outputs depends upon the port configuration selected. Each port pin is configured independently. Refer to the section on I/O port configuration and the DC Electrical Characteristics for details.

Port 4 also provides various special functions as described below:

1999 Oct 05

Philips Semiconductors Preliminary specification

NAME

DESCRIPTION

XA 16-bit microcontroller

32K/1K OTP/ROM/ROMless, 8-channel 8-bit A/D, low voltage (2.7 V–5.5 V),

C, 2 UARTs, 16 MB address range

XA-S3

MNEMONIC NAME AND FUNCTIONTYPE

P5.0 – P5.7

P6.0 – P6.7

PIN NUMBER

LQFPPLCC

23–30 17–20,

22–25

23 17 I AD0 (P5.0): A/D channel 0 input. 24 18 I AD1 (P5.1): A/D channel 1 input. 25 19 I AD2 (P5.2): A/D channel 2 input. 26 20 I AD3 (P5.3): A/D channel 3 input. 27 22 I AD4 (P5.4): A/D channel 4 input. 28 23 I AD5 (P5.5): A/D channel 5 input. 29 24 I/O AD6/SCL (P5.6): A/D channel 6 input. I2C serial clock input/output. 30 25 I/O AD7/SDA (P5.7): A/D channel 7 input. I2C serial data input/output.

43, 44 40, 41 I/O Port 6: Port 6 is a 2-bit I/O port with a user-configurable output type. Port 6 latches have

43 40 O A22 (P6.0): Address bit 22 of the external address bus. 44 41 O A23 (P6.1): Address bit 23 of the external address bus.

I/O Port 5: Port 5 is an 8-bit I/O port with a user-configurable output type. Port 5 latches have

1s written to them and are configured in the quasi-bidirectional mode during reset. The operation of Port 5 pins as inputs and outputs depends upon the port configuration selected. Each port pin is configured independently. Refer to the section on I/O port configuration and the DC Electrical Characteristics for details.

Port 5 also provides various special functions as described below. Port 5 pins used as A/D inputs must be configured by the user to the high impedance mode.

1s written to them and are configured in the quasi-bidirectional mode during reset. The operation of Port 6 pins as inputs and outputs depends upon the port configuration selected. Each port pin is configured independently. Refer to the section on I/O port configuration and the DC Electrical Characteristics for details.

Port 6 also provides special functions as described below:

Table 1. Special Function Registers

SFR

Address

ADCON#* A/D control register 43E – – – –

ADCS#* A/D channel select register 43F ADCFG# A/D timing configuration 4B9 – – – – A/D Timing Configuration 0Fh ADRSH0# A/D high byte result, channel 0 4B0 xx

ADRSH1# A/D high byte result, channel 1 4B1 xx ADRSH2# A/D high byte result, channel 2 4B2 xx ADRSH3# A/D high byte result, channel 3 4B3 xx ADRSH4# A/D high byte result, channel 4 4B4 xx ADRSH5# A/D high byte result, channel 5 4B5 xx ADRSH6# A/D high byte result, channel 6 4B6 xx ADRSH7# A/D high byte result, channel 7 4B7 xx ADRSL# Two LSBs of 10-bit A/D result 4B8 xx

BCR# Bus configuration register 46A – – CLKD WAITD BUSD BC2 BC1 BC0 Note 1 BTRH Bus timing register high byte 469 DW1 DW0 DWA1 DWA0 DR1 DR0 DRA1 DRA0 FFh BTRL Bus timing register low byte 468 WM1 WM0 ALEW – CR1 CR0 CRA1 CRA0 EFh

CCON#* PCA counter control 41A CF CR – CCF4 CCF3 CCF2 CCF1 CCF0 00h CMOD# PCA mode control 490 CIDL WDTE – – – CPS1 CPS0 ECF 00h CH# PCA counter high byte 48B 00h CL# PCA counter low byte 48A 00h CCAPM0# PCA module 0 mode 491 – ECOM CAPP CAPN MAT TOG PWM ECCF 00h CCAPM1# PCA module 1 mode 492 – ECOM CAPP CAPN MAT TOG PWM ECCF 00h

MSB LSB

3F7 3F6 3F5 3F4 3F3 3F2 3F1 3F0

3FF 3FE 3FD 3FC 3FB 3FA 3F9 3F8

ADCS7 ADCS6 ADCS5 ADCS4 ADCS3 ADCS2 ADCS1 ADCS0

2D7 2D6 2D5 2D4 2D3 2D2 2D1 2D0

BIT FUNCTIONS AND ADDRESSES

ADRES ADMOD ADSST ADINT

Reset Value

00h

1999 Oct 05

Philips Semiconductors Preliminary specification

XA 16-bit microcontroller

32K/1K OTP/ROM/ROMless, 8-channel 8-bit A/D, low voltage (2.7 V–5.5 V),

C, 2 UARTs, 16 MB address range

XA-S3

SFR

DESCRIPTIONNAME

NAME

CCAPM2# PCA module 2 mode 493 – ECOM CAPP CAPN MAT TOG PWM ECCF 00h CCAPM3# PCA module 3 mode 494 – ECOM CAPP CAPN MAT TOG PWM ECCF 00h CCAPM4# PCA module 4 mode 495 – ECOM CAPP CAPN MAT TOG PWM ECCF 00h CCAP0H# PCA module 0 capture high byte 497 xx

CCAP1H# PCA module 1 capture high byte 499 xx CCAP2H# PCA module 2 capture high byte 49B xx CCAP3H# PCA module 3 capture high byte 49D xx CCAP4H# PCA module 4 capture high byte 49F xx CCAP0L# PCA module 0 capture low byte 496 xx CCAP1L# PCA module 1 capture low byte 498 xx CCAP2L# PCA module 2 capture low byte 49A xx CCAP3L# PCA module 3 capture low byte 49C xx CCAP4L# PCA module 4 capture low byte 49E xx CS Code segment 443 00h DS Data segment 441 00h ES Extra segment 442 00h

I2CON#* I2C control register 42C CR2 ENA STA STO SI AA CR1 CR0 00h I2STAT# I2C status register 46C I2C Status Code/Vector 0 0 0 F8h I2DAT# I2C data register 46D xx I2ADDR# I2C address register 46E I2C Slave Address GC 00h

IEH* Interrupt enable high byte 427 – – – – ETI1 ERI1 ETI0 ERI0 00h

IEL#* Interrupt enable low byte 426 EA EAD EPC ET2 ET1 EX1 ET0 EX0 00h

IELB#* Interrupt enable B low byte 42E – – EI2 EC4 EC3 EC2 EC1 EC0 00h IPA0 Interrupt priority A0 4A0 – PT0 – PX0 00h IPA1 Interrupt priority A1 4A1 – PT1 – PX1 00h IPA2# Interrupt priority A2 4A2 – PPC – PT2 00h IPA3# Interrupt priority A3 4A3 – – – PAD 00h IPA4 Interrupt priority A4 4A4 – PTI0 – PRI0 00h IPA5 Interrupt priority A5 4A5 – PTI1 – PRI1 00h IPB0# Interrupt priority B0 4A8 – PC1 – PC0 00h IPB1# Interrupt priority B1 4A9 – PC3 – PC2 00h IPB2# Interrupt priority B2 4AA – PI2 – PC4 00h

P0* Port 0 430 A11D7 A10D6 A9D5 A8D4 A7D3 A6D2 A5D1 A4D0 FFh

P1* Port 1 431 T2EX T2 TxD1 RxD1 A3 A2 A1

P2* Port 2 432

P3* Port 3 433 RD WRL T1 T0 INT1 INT0 TxD0 RxD0 FFh

P4#* Port 4 434 A21 A20 CEX4 CEX3 CEX2 CEX1 CEX0 ECI FFh

DESCRIPTION

SFR

Address

367 366 365 364 363 362 361 360

33F 33E 33D 33C 33B 33A 339 338

337 336 335 334 333 332 331 330

377 376 375 374 373 372 371 370

387 386 385 384 383 382 381 380

38F 38E 38D 38C 38B 38A 389 388

397 396 395 394 393 392 391 390

A19D15 A18D14 A17D13 A16D12 A15D11 A14D10 A13D9 A12D8

39F 39E 39D 39C 39B 39A 399 398

3A7 3A6 3A5 3A4 3A3 3A2 3A1 3A0

BIT FUNCTIONS AND ADDRESSES

A0/WRH

Reset

Value

LSBMSB

Value

FFh

1999 Oct 05

Philips Semiconductors Preliminary specification

XA 16-bit microcontroller

32K/1K OTP/ROM/ROMless, 8-channel 8-bit A/D, low voltage (2.7 V–5.5 V),

C, 2 UARTs, 16 MB address range

XA-S3

SFR

DESCRIPTIONNAME

NAME

P5#* Port 5 435

P6#* Port 6 436 – – – – – – A23 A22 FFh

P0CFGA Port 0 configuration A 470 Note 5 P1CFGA Port 1 configuration A 471 Note 5 P2CFGA Port 2 configuration A 472 Note 5 P3CFGA Port 3 configuration A 473 Note 5 P4CFGA# Port 4 configuration A 474 Note 5 P5CFGA# Port 5 configuration A 475 Note 5 P6CFGA# Port 6 configuration A 476 – – – – – – Note 5 P0CFGB Port 0 configuration B 4F0 Note 5 P1CFGB Port 1 configuration B 4F1 Note 5 P2CFGB Port 2 configuration B 4F2 Note 5 P3CFGB Port 3 configuration B 4F3 Note 5 P4CFGB# Port 4 configuration B 4F4 Note 5 P5CFGB# Port 5 configuration B 4F5 Note 5 P6CFGB# Port 6 configuration B 4F6 – – – – – – Note 5

PCON* Power control register 404 – – – – – – PD IDL 00h

PSWH* Program status word (high byte) 401 SM TM RS1 RS0 IM3 IM2 IM1 IM0 Note 2

PSWL* Program status word (low byte) 400 C AC – – – V N Z Note 2

PSW51* 80C51 compatible PSW 402 C AC F0 RS1 RS0 V F1 P Note 3

DESCRIPTION

SFR

Address

3AF 3AE 3AD 3AC 3AB 3AA 3A9 3A8

AD7/SDA AD6/SCL

227 226 225 224 223 222 221 220

20F 20E 20D 20C 20B 20A 209 208

207 206 205 204 203 202 201 200

217 216 215 214 213 212 211 210

BIT FUNCTIONS AND ADDRESSES

AD5 AD4 AD3 AD2 AD1 AD0 FFh

3B1 3B0

Reset

Value

LSBMSB

Value

RSTSRC# Reset source register 463 – – – – – R_WD

RTH0 Timer 0 reload register, high byte 455 00h RTH1 Timer 1 reload register, high byte 457 00h RTL0 Timer 0 reload register, low byte 454 00h RTL1 Timer 1 reload register, low byte 456 00h

307 306 305 304 303 302 301 300

S0CON* Serial port 0 control reg ister 420 SM0_0 SM1_0 SM2_0 REN_0 TB8_0 RB8_0 TI_0 RI_0 00h

30F 30E 30D 30C 30B 30A 309 308 S0STAT#* Serial port 0 extended status 421 – – – ERR0 FE0 BR0 OE0 S0BUF Serial port 0 data buffer register 460 xx

S0ADDR Serial port 0 address register 461 00h S0ADEN Serial port 0 address enable 462 00h

327 326 325 324 323 322 321 320 S1CON* Serial port 1 control register 424 SM0_1 SM1_1 SM2_1 REN_1 TB8_1 RB8_1 TI_1 RI_1 00H

32F 32E 32D 32C 32B 32A 329 328 S1STAT#* Serial port 1 extended status 425 – – – ERR1 FE1 BR1 OE1

S1BUF Serial port 1 data buffer register 464 xx S1ADDR Serial port 1 address register 465 00h

1999 Oct 05

R_CMD

R_EXT Note 7

STINT0

STINT1

00h

Philips Semiconductors Preliminary specification

XA 16-bit microcontroller

32K/1K OTP/ROM/ROMless, 8-channel 8-bit A/D, low voltage (2.7 V–5.5 V),

C, 2 UARTs, 16 MB address range

XA-S3

SFR

DESCRIPTIONNAME

NAME

S1ADEN Serial port 1 address enable 466 00h SCR System configuration register 440 – – – – PT1 PT0 CM PZ 00h

SSEL* Segment selection register 403

SWE Software interrupt enable 47A – SWE7 SWE6 SWE5 SWE4 SWE3 SWE2 SWE1 00h

SWR* Software interrupt request 42A – SWR7 SWR6 SWR5 SWR4 SWR3 SWR2 SWR1 00h

T2CON* Timer 2 control register 418 TF2 EXF2 RCLK0 TCLK0

T2MOD* Timer 2 mode control 419 – – RCLK1 TCLK1 – – T2OE DCEN 00h TH2 Timer 2 high byte 459 00h

TL2 Timer 2 low byte 458 00h T2CAPH T imer 2 capture, high byte 45B 00h T2CAPL Timer 2 capture, low byte 45A 00h

TCON* Timer 0 and 1 control register 410 TF1 TR1 TF0 TR0 IE1 IT1 IE0 IT0 00h TH0 Timer 0 high byte 451 00h

TH1 Timer 1 high byte 453 00h TL0 Timer 0 low byte 450 00h TL1 Timer 1 low byte 452 00h

TMOD Timer 0 and 1 mode cont rol 45C GATE C/T M1 M0 GATE C/T M1 M0 00h

TSTAT* Timer 0 and 1 extended status 411 – – – – – T1OE – T0OE 00h

WDCON* Watchdog control register 41F PEW2 PRE1 PRE0 – – WDL Watchdog timer reload 45F 00h

WFEED1 Watchdog feed 1 45D xx WFEED2 Watchdog feed 2 45E xx

NOTES:

* SFRs are bit addressable. # SFRs are modified from or added to XA-G3 SFRs.

1. At reset, the BCR is loaded with the binary value 00000a11, where “a’ is the value on the BUSW pin. This defaults the address bus size to 24 bits.

2. SFR is loaded from the reset vector.

3. All bits except F1, F0, and P are loaded from the reset vector. Those bits are all 0.

4. Unimplemented bits in SFRs are X (unknown) at all times. Ones should not be written to these bits since they may be used for other purposes in future XA derivatives. The reset value shown for these bits is 0.

5. Port configurations default to quasi-bidirectional when the XA begins execution from internal code memory after reset, based on the condition found on the EA execution using internal code memory. When the XA begins execution using external code memory, the default configuration for pins that are associated with the external bus will be push-pull. The PnCFGA and PnCFGB register contents will reflect this difference.

6. The WDCON reset value is E6 for a Watchdog reset, E4 for all other reset causes.

7. The RSTSRC register reflects the cause of the last XA-S3 reset. One bit will be set to 1, the others will be cleared to 0.

8. The XA guards writes to certain bits (typically interrupt flags) that may be altered directly by a peripheral function. This prevents loss of an interrupt or other status if a bit was written directly by a peripheral action during the time between the read and write portions of an instruction that performs a read-modify-write operation. Examples of such instructions are:

XA-S3 SFR bits that are guarded in this manner are: ADINT (in ADCON); CF, CCF4, CCF3, CCF2, CCF1, and CCF0 (in CCON); SI (in I2CON); TI_0 and RI_0 (in S0CON); TI_1 and RI_1 (in S1CON); FE0, BR0, and OE0 (in S0STAT); FE1, BR1, and OE1 (in S1STAT); TF2 (in T2CON); TF1, TF0, IE1, and IE0 (in TCON); and WDTOF (in WDCON).

9. The XA-S3 implements an 8-bit SFR bus, as stated in to write 16 bits to an SFR will actually write only the lower 8 bits. Sixteen bit SFR reads will return undefined data in the upper byte.

DESCRIPTION

pin. Thus, all PnCFGA registers will contain FF, and PnCFGB register will contain 00 when the XA begins

and s0con,#$fb clr tr0 setb ti_0

SFR

Address

21F 21E 21D 21C 21B 21A 219 218

ESWEN R6SEG R5SEG R4SEG R3SEG R2SEG R1SEG R0SEG

357 356 355 354 353 352 351 350

2C7 2C6 2C5 2C4 2C3 2C2 2C1 2C0

2CF 2CE 2CD 2CC 2CB 2CA 2C9 2C8

287 286 285 284 283 282 281 280

28F 28E 28D 28C 28B 28A 289 288

2FF 2FE 2FD 2FC 2FB 2FA 2F9 2F8

Chapter 8

of the

BIT FUNCTIONS AND ADDRESSES

EXEN2

XA User Guide

. All SFR accesses must be 8-bit operations. Attempts

TR2 C/T2

WDRUN WDTOF

CP/RL2

Reset

Value

LSBMSB

Value

00h

– Note 6

1999 Oct 05

Philips Semiconductors Preliminary specification

XA 16-bit microcontroller

32K/1K OTP/ROM/ROMless, 8-channel 8-bit A/D, low voltage (2.7 V–5.5 V),

C, 2 UARTs, 16 MB address range

FFFFFh

Up to 16 MB

Total Code

Memory

8000h

7FFFh

32 kB On-chip Code Memory

0000h

SU01219

Figure 1. XA-S3 program memory map

XA-S3

1 kB

On-Chip Data

Memory

(RAM)

Data Segment 0

Data Memory

(Indirectly Addressed,

Off-Chip)

Data Memory

(Directly or Indirectly

Addressable, On-Chip

(Bit-Addressable

Data Area)

Data Memory

(Directly or Indirectly

Addressable, On-Chip

FFFFh

0400h 03FFh

0040h 003Fh

0020h 001Fh

0000h

Directly

Addressed

Data

(1 k per

Segment)

FFFFh

0400h

03FFh

0040h 003Fh

0020h 001Fh

0000h

Other Data Segments

Data Memory

(Indirectly Addressed,

Off-Chip)

Data Memory

(Directly or Indirectly

Addressable, On-Chip

(Bit-Addressable

Data Area)

Data Memory

(Directly or Indirectly

Addressable, Off-Chip

1999 Oct 05

SU01220

Figure 2. XA-S3 data memory map

Philips Semiconductors Preliminary specification

XA 16-bit microcontroller

32K/1K OTP/ROM/ROMless, 8-channel 8-bit A/D, low voltage (2.7 V–5.5 V),

C, 2 UARTs, 16 MB address range

FUNCTIONAL DESCRIPTION

Details of XA-S3 functions will be described in the following sections.

Analog to Digital converter

The XA-S3 has an 8-channel, 8-bit A/D converter with 8 sets of result registers, single scan and multiple scan operating modes. The A/D also has a 10-bit conversion mode that provides greater result resolution. The A/D input range is limited to 0 to AV The A/D inputs are on Port 5. Analog Power and Ground as well as AV

and AV

REF+

be used. Prior to enabling the A/D converter or driving analog signals into the A/D inputs, the port configurations for the pins being used as A/D inputs must be set to the “off” (high impedance, input only) mode.

A/D timing can be adapted to the application clock frequency in order to provide the fastest possible conversion.

A/D converter operation is controlled through the ADCON (A/D Control) register, see Figure 1. Bits in ADCON start and stop the A/D, flag conversion completion, and select the converter operating modes. When 10-bit resolution is needed, the A/D mode may be set to give 10 result bits by setting the ADRES bit to 1. In this mode, the A/D takes longer to complete a conversion, and the timing must be set differently in ADCFG.

A/D Conversion Modes

The A/D converter supports a single scan mode and a continuous scan mode. In either mode, one or more A/D channels may be converted. The ADCS register determines which channels are converted. If the corresponding bit in the ADCS register is set, that channel is selected for conversions, otherwise that channel is skipped. The ADCS register is detailed in Figure 2.

For any A/D conversion, the results are stored in ADRSHn, corresponding to the A/D channel just converted. For a 10-bit conversion, the two least significant bits are read from the upper end of register ADRSL. These bits must be read before another conversion is begun.

must be supplied in order for the A/D converter to

REF–

(3.3 V max.).

A/D conversions are begun by setting the A/D Start and STatus bit in ADCON. In the single scan mode, all of the channels selected by bits in the ADCS register will be converted once. The ADINT flag is set when the last channel is converted. In the continuous scan mode, the A/D converter continuously converts all A/D channels selected by bits in the ADCS register. The ADINT flag is set when all channels have been converted once.

The A/D converter can generate an interrupt when the ADINT flag is set. This will occur if the A/D interrupt is enabled (via the EAD bit in IEL), the interrupt system is enabled (via the EA bit in IEL), and the A/D interrupt priority (specified in IPA3 bits 3 to 0) is higher than the currently running code (PSW bits IM3 through IM0) and any other pending interrupt. ADINT must be cleared by software.

A/D Timing Configuration

The A/D sampling and conversion timing may be optimized for the particular oscillator frequency and input drive characteristics of the application. Because A/D operation is mostly dependent on real-time effects (charging time of sampling capacitors, settling time of the comparator, etc.), A/D conversion times are not necessarily much longer at slower clock frequencies. The A/D timing is controlled by the ADCFG register, as shown in Figure 3, Table 2 and Table 3.

The primary effect of ADCFG settings is to adjust the A/D sample and hold time to be relatively constant over various clock frequencies. Two settings (value 6 and B) are provided to allow fast conversions with a lower external source driving the A/D inputs. These settings provide double the sample time at the same frequency. Of course, settings intended for lower frequencies may also be used at higher frequencies in order to increase the A/D sampling time, but this method has the side effect of significantly increasing A/D conversion times.

XA-S3

ADCON Address:43Eh Bit Addressable Reset Value: 00h

BIT SYMBOL FUNCTION

ADCON.7 — Reserved for future use. Should not be set to 1 by user programs. ADCON.6 — Reserved for future use. Should not be set to 1 by user programs. ADCON.5 — Reserved for future use. Should not be set to 1 by user programs. ADCON.4 — Reserved for future use. Should not be set to 1 by user programs. ADCON.3 ADRES Selects 8-bit (0) or 10-bit (1) conversion mode. ADCON.2 ADMOD A/D mode select.

ADCON.1 ADSST A/D start and status. Setting this bit by software starts the A/D conversion of the selected A/D

ADCON.0 ADINT A/D conversion complete/interrupt flag. This flag is set when all selected A/D channels are

1999 Oct 05

LSBMSB

ADSSTADMODADRES————

1 = continuous scan of selected inputs after a start of the A/D. 0 = single scan of selected inputs after a start of the A/D.

inputs. ADSST remains set as long as the A/D is in operation. In continuous conversion mode, ADSST will remain set unless the A/D is stopped by software. While ADSST is set, new start commands are ignored. An A/D conversion is progress may be aborted by software clearing ADSST.

converted in either the single scan or continuous scan modes. Must be cleared by software.

Figure 1. A/D Control Register (ADCON)

ADINT

SU01229

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