Philips pcf84c00 DATASHEETS

INTEGRATED CIRCUITS

DATA SH EET

PCF84C00

8-bit microcontroller with I
interface

Product specification
Supersedes data of May 1996
File under Integrated Circuits, IC14

2

C-bus

1996 Nov 25

Philips Semiconductors Product specification

8-bit microcontroller with I2C-bus
interface

CONTENTS

1 FEATURES
2 GENERAL DESCRIPTION
3 ORDERING INFORMATION
4 BLOCK DIAGRAM
5 PINNING
6 FUNCTIONAL DESCRIPTION

6.1 ‘Piggy-back’ version PCF84C00B

6.2 ROM-less version PCF84C00T

6.3 Data memory

6.4 I/O facilities

6.5 Reset
7 LIMITING VALUES
8 HANDLING
9 DC CHARACTERISTICS
10 AC CHARACTERISTICS
11 PACKAGE OUTLINES
12 SOLDERING

12.1 Introduction

12.2 DIP

12.2.1 Soldering by dipping or by wave

12.2.2 Repairing soldered joints

12.3 SO and VSO

12.3.1 Reflow soldering

12.3.2 Wave soldering

12.3.3 Repairing soldered joints
13 DEFINITIONS
14 LIFE SUPPORT APPLICATIONS
15 PURCHASE OF PHILIPS I2C COMPONENTS

PCF84C00

1996 Nov 25 2

Philips Semiconductors Product specification

8-bit microcontroller with I2C-bus interface

1 FEATURES

• Manufactured in silicon gate CMOS process

• 8-bit CPU, RAM, I/O in a single 28-lead or 56-lead

package

• ‘Piggy-back’ and ROM-less versions, external program
memory

• 256 × 8 RAM

• 20 quasi-bidirectional I/O port lines

• Two test inputs, one of which is also the external

interrupt input

• Three single-level vectored interrupts:
– external
– timer/event counter

2

C-bus

–I

• I2C-bus interface for serial data transfer on two lines
(serial I/O data via an existing port line and clock via a
dedicated line)

• 8-bit programmable timer/event counter

• Clock frequency range: 100 kHz to 10 MHz

• Over 80 instructions (similar to those of the MAB8048)

all of 1 or 2 cycles

• Single supply voltage (2.5 to 5.5 V)

• Stop and Idle modes

• Power-on reset circuit

• Operating temperature range: −40 to +85 °C.

PCF84C00

2 GENERAL DESCRIPTION

This data sheet details the specific properties of the
PCF84C00. The shared properties of the PCF84CxxxA
family of microcontrollers are described in the

“PCF84CxxxA family”

conjunction with this publication.
The PCF84C00 has 20 quasi-bidirectional I/O lines, an

I2C-bus serial interface, a single-level vectored interrupt
structure, an 8-bit timer/event counter and on-chip clock
oscillator and clock circuits.

This efficient controller also performs well as an arithmetic
processor. It has facilities for both binary and BCD
arithmetic plus bit-handling capabilities.

The instruction set is similar to the MAB8048 and is a
sub-set of that listed in the
sheet.

data sheet, which should be read in

“PCF84CxxxA family”

data

3 ORDERING INFORMATION

TYPE

NUMBER

PCF84C00B − Non-standard 28-lead ‘piggy-back’ package with 28-pin EPROM socket

PCF84C00T VSO56 Plastic very small outline package; 56 leads. SOT 190-1

1996 Nov 25 3

NAME DESCRIPTION VERSION

on top. Bottom ‘footprint’ and pinning as DIP 28, version SOT117-1.
The SOT117-1 information provided in Chapter “Package Outlines” is
correct in these respects, but not for the physical size of the
PCF84C00B, which is larger than the SOT117-1 package.

PACKAGE

−

Philips Semiconductors Product specification

8-bit microcontroller with I2C-bus interface

4 BLOCK DIAGRAM

handbook, full pagewidth

SCLK

clock

I2C-BUS

INTERFACE

SIO
interrupt

data

SERIAL DATA/P2.3

PORT 2

BUFFER

PORT 2

LATCH

INTERNAL

CLOCK

FREQUENCY

4

P2.2 to P2.0

3

30

"SEE

FIGS 2 AND 3"

MEMORY

BANK

FLIP-FLOPS

TIMER/

32

EVENT

COUNTER

TEST 1

885

(8)

timer
interrupt

13

HIGHER
PROGRAM
COUNTER

(5)

PCF84C00

P1.7 to P1.0

88

PORT 1

BUFFER

PORT 1

LATCH

LOWER
PROGRAM
COUNTER

(8)

88 7 8

PROGRAM

STATUS

WORD

8

PORT 0

LATCH

P0.7 to P0.0

PORT 0

BUFFER

ACCUMULATOR

POWER

ON

RESET

RESET

POWER
SUPPLY

V

V

DD

SS

TEMPORARY

REGISTER 1

V

POR



GND

STOP
IDLE

(8) (8)(8)

INT/T0

INTERRUPT

TEMPORARY

REGISTER 2

external
interrupt

CONTROL & TIMING

INITIALIZE

INTERRUPT

LOGIC

ARITHMETIC

LOGIC UNIT

(8)

DECIMAL

ADJUST

XTAL 2XTAL 1RESET

OSCILLATOR

XTAL

Fig.1 Block diagram.

INSTRUCTION

REGISTER

&

DECODER

PROGRAM
COUNTER

CONDITIONAL

BRANCH

LOGIC

RAM

ADDRESS

REGISTER

INT/T0
TEST 1
TIMER FLAG
CARRY

ACC
ACC BIT

TEST

MULTIPLEXER

REGISTER 0
REGISTER 1
REGISTER 2
REGISTER 3
REGISTER 4
REGISTER 5

D

REGISTER 6

E

REGISTER 7

C

8 LEVEL STACK

O

(VARIABLE LENGTH)

D

OPTIONAL SECOND

E

REGISTER BANK

DATA STORE

RESIDENT RAM ARRAY

MGG401

1996 Nov 25 4

Philips Semiconductors Product specification

8-bit microcontroller with I2C-bus interface

A0-A12

PSEN

Fig.2 Replacement of dotted section in Fig.1, for

the PCF84C00B ‘piggy-back’ version.

5 PINNING Table 1 PCF84C00B (see Fig.4)

D0-D7

8

13

MGG402

PCF84C00

full pagewidth

PSEN

DXALE

DXRD

DXWR

EXDI

Fig.3 Replacement of dotted section in Fig.1, for

the PCF84C00T ROM-less version.

A0-A12

D0-D7

13

8

SYMBOL PIN TYPE DESCRIPTION

P2.2 1 I/O 1 bit of Port 2: 4-bit quasi-bidirectional I/O port

2

SDA/P2.3 2 I/O bidirectional data line of the I

C-bus interface; or 1 bit of Port 2: 4-bit

quasi-bidirectional I/O line

2

SCLK 3 I/O bidirectional clock line of the I

C-bus interface
P0.0 to P0.7 4 to 11 I/O 8 bits of Port 0: 8-bit quasi-bidirectional I/O port
INT/T0 12 I Interrupt/Test 0: external interrupt input (negative edge triggered)/test input

pin. When used as a test input, this pin is directly tested by conditional branch
instructions JT0 and JNT0.

T1 13 I Test 1: test input pin, directly tested by conditional branch instructions JT1 and

JNT1. T1 may also be selected as an input to the 8-bit timer/event counter via
the STRT CNT instruction.

V

SS

14 P ground: circuit earth potential

XTAL1 15 I oscillator input: input from a crystal which determines the internal oscillator

frequency or an external clock generator
XTAL2 16 I/O oscillator output: output of the inverting amplifier
RESET 17 I/O reset input: used to initialize the microcontroller (active HIGH); also output of

power-on-reset circuit
P1.0 to P1.7 18 to 25 I/O 8 bits of Port 1: 8-bit quasi-bidirectional I/O port
P2.0 to P2.1 26, 27 I/O 2 bits of Port 2: 4-bit quasi-bidirectional I/O port
V

DD

28 P power supply: 2.5 V to 5.5 V

1996 Nov 25 5

Philips Semiconductors Product specification

8-bit microcontroller with I2C-bus interface

Table 2 PCF84C00T (see Fig.5)

SYMBOL PIN TYPE DESCRIPTION

P2.2 1 I/O 1 bit of Port 2: 4-bit quasi-bidirectional I/O port

2

SDA/P2.3 2 I/O bidirectional data line of the I

quasi-bidirectional I/O port
SCLK 3 I/O bidirectional clock line of the I
P0.0 to P0.1 4, 5 I/O 2 bits of Port 0: 8-bit quasi-bidirectional I/O port
DXALE 6 O Address latch enable: on the falling edge of DXALE, the Dx address can be

latched in an external latch. This signal occurs only during execution of the

MOV Dx, A, MOV A, Dx, ANL Dx, A and ORL Dx, A instructions, with

x = 0 to 255. It is active during TS10 of cycle 1 and the first half of TS1 of

cycle 2.
n.c. 7 − not connected
P0.2 to P0.7 8 to 13 I/O 6 bits of Port 0: 8-bit quasi-bidirectional I/O port
INT/T0 14 I Interrupt/Test 0: external interrupt input (negative edge triggered)/test input

pin. When used as a test input, this pin is directly tested by conditional branch

instructions JT0 and JNT0; note 1.
T1 15 I T est 1: test input pin, directly tested by conditional branch instructions JT1 and

JNT1. T1 may also be selected as an input to the 8-bit timer/event counter via

the STRT CNT instruction.
D0 to D2 16 to 18 I/O 3 bits of 8-bit data bus: for external memory and peripherals. The specified

Stop mode supply current is valid only if external pull-ups are connected to all

data lines.
A12 19 O 1 bit of 13-bit address bus: for external memory and peripherals
DXWR 20 O Write strobe (active LOW): on the rising edge, data on D0-D7 may be written

to external registers. This signal occurs only during MOV Dx, A, ANL Dx, A

and ORL Dx, A instructions, with x = 0 to 255. It is active during TS7 of

cycle 2.
n.c. 21 − not connected
A11 to A6 22 to 27 O 6 bits of 13-bit address bus: for external memory and peripherals
V

SS

A5 to A0 29 to 34 O 6 bits of 13-bit address bus: for external memory and peripherals
DXRD 35 O Read strobe (active LOW): when this signal is active, external registers

D3 to D7 36 to 40 I/O 5 bits of 8-bit data bus: for external memory and peripherals. The specified

PSEN 41 O Program store enable (active LOW): PSEN is used to enable external

XTAL1 42 I oscillator input: input from a crystal which determines the internal oscillator

XTAL2 43 I/O oscillator output: output of the inverting amplifier

28 P ground: circuit earth potential

emulating Dx registers can be read by the data bus. This signal occurs only

during execution of MOV A, Dx, ANL Dx, A and ORL Dx, A instructions, with

x=0to255. It is active during TS3 and TS4 of cycle 2.

Stop mode supply current is valid only if external pull-ups are connected to all

data lines.

program memory and is active during TS9 and TS10 of each machine cycle

and TS1 of each following cycle. PSEN is HIGH during the Stop mode.

frequency or an external clock generator

C-bus interface; or 1 bit of Port 2: 4-bit

2

C-bus interface

PCF84C00

1996 Nov 25 6

Philips Semiconductors Product specification

8-bit microcontroller with I2C-bus interface

SYMBOL PIN TYPE DESCRIPTION

RESET 44 I/O reset input: used to initialize the microcontroller (active HIGH); also output of

power-on-reset circuit
P1.0 to P1.3 45 to 48 I/O 4 bits of Port 1: 8-bit quasi-bidirectional I/O port
EXDI 49 I External derivative interrupt (active LOW): EXDI is ‘OR-ed’ with the internal

serial interrupt and can be used to initiate an interrupt from external hardware

emulating derivative functions. EXDI is pulled HIGH internally. The derivative

interrupt is polled during time slot TS6 (note 1), and is only accepted if an EN

SI instruction has been executed and the device is not already executing an

interrupt routine. Derivative interrupts are not latched in the PCF84C00.
P1.4 to P1.7 50 to 53 I/O 4 bits of Port 1: 8-bit quasi-bidirectional I/O port
P2.0 to P2.1 54, 55 I/O 2 bits of Port 2: 4-bit quasi-bidirectional I/O port
V

DD

Note

1. The interrupt signal must remain active until the vector address (05 H) is present on the address bus.

56 P power supply: 2.5 V to 5.5 V

PCF84C00

1996 Nov 25 7

Philips Semiconductors Product specification

8-bit microcontroller with I2C-bus interface

handbook, halfpage

P2.2
P2.3

SCLK

P0.0
P0.1
P0.2
P0.3
P0.4
P0.5
P0.6
P0.7

INT/T0

T1

V

SS

1
2
3
4
5
6
7

PCF84C00B

8

9
10
11
12
13

MGG403

28
27
26
25
24
23
22
21
20
19
18
17
16
1514

V

DD

P2.1
P2.0
P1.7
P1.6
P1.5
P1.4
P1.3
P1.2
P1.1
P1.0
RESET
XTAL2
XTAL1

handbook, halfpage

P2.2
P2.3

SCLK

P0.0
P0.1

DXALE

n.c.
P0.2
P0.3
P0.4
P0.5
P0.6
P0.7

INT/T0

T1
D0
D1
D2

A12

DXWR

n.c.
A11
A10

A9
A8
A7
A6

V

SS

1
2
3
4
5
6
7
8

9
10
11
12
13
14

PCF84C00T

15
16
17
18
19

20

21
22
23
24
25
26
27
28

MGG404

PCF84C00

V

56

DD

P2.1

55

P2.0

54

P1.7

53

P1.6

52

P1.5

51

P1.4

50

EXDI

49

P1.3

48

P1.2

47

P1.1

46

P1.0

45

RESET

44

XTAL2

43

XTAL1

42

PSEN

41

D7

40

D6

39

D5

38

D4

37

D3

36

DXRD

35

A0

34

A1

33

A2

32

A3

31

A4

30

A5

29

Fig.4 Bottom pinning diagram, ‘piggy-back’

version PCF84C00B.

1996 Nov 25 8

Fig.5 Pinning diagram; ROM-less version

PCF84C00T.