Philips PCF84C12AP, PCF84C12AT Datasheet

INTEGRATED CIRCUITS

DATA SHEET

PCF84C12A

8-bit microcontroller

Product specification

1998 May 11

Supersedes data of 1996 Nov 20

File under Integrated Circuits, IC14

Philips Semiconductors	Product specification
8-bit microcontroller	PCF84C12A

CONTENTS

1FEATURES

2GENERAL DESCRIPTION

3ORDERING INFORMATION (see note 1)

4BLOCK DIAGRAM

5PINNING INFORMATION

5.1Pinning

5.2Pin description

6INSTRUCTION SET

7ROM MASK OPTIONS

8HANDLING

9LIMITING VALUES

10DC CHARACTERISTICS

11AC CHARACTERISTICS

12PACKAGE OUTLINES

13SOLDERING

13.1Introduction

13.2DIP

13.3SO

14DEFINITIONS

15LIFE SUPPORT APPLICATIONS

1998 May 11

2

Philips Semiconductors	Product specification
8-bit microcontroller	PCF84C12A

1 FEATURES

∙Manufactured in silicon gate CMOS process

∙8-bit CPU, ROM, RAM, I/O in a 20-lead package

∙1 kbyte ROM

∙64 byte RAM

∙Over 100 instructions (based on MAB8048) all of 1 or 2 cycles

∙13 quasi-bidirectional I/O port lines

∙8-bit programmable timer/event counter 1

∙Two single-level vectored interrupts:

– external

– 8-bit programmable timer/event counter 1

∙Two test inputs, one of which also serves as the external interrupt input

∙Stop and Idle modes

∙Supply voltage: 2.5 to 5.5 V

∙Clock frequency: 1 to 16 MHz

∙Operating temperature: −40 to +85 °C.

2 GENERAL DESCRIPTION

This data sheet details the specific properties of the PCF84C12A. The shared properties of the PCF84CxxxA family of microcontrollers are described in the “PCF84CxxxA family” data sheet, which should be read in conjunction with this publication. Note that the devices described in this data sheet do not feature I2C-bus compatibility or derivative logic, so the information given in the family data sheet about these features can be ignored.

The PCF84C12A is a general purpose CMOS microcontroller with 1 kbyte of program memory. It includes 64 bytes of RAM and 13 I/O port lines.

The instruction set is based on the MAB8048 and is a sub-set of that listed in the “PCF84CxxxA family” data sheet.

3 ORDERING INFORMATION

	TYPE NUMBER(1)		PACKAGE
		NAME	DESCRIPTION	VERSION
	PCF84C12AP	DIP20	plastic dual in-line package; 20 leads (300 mil)	SOT146-1
	PCF84C12AT	SO20	plastic small outline package; 20 leads; body width 7.5 mm	SOT163-1

Note

1.Please refer to the Order Entry Form (OEF) for these devices for the full type number to use when ordering. This type number will also specify the required program and ROM mask options.

1998 May 11

3

_
1998
May	P1.0 to P1.4		RESIDENT ROM				P0.7 to P0.0
11	3		1 kbyte
			(PCF84C12A)
			2 kbytes
	PORT 1		(PCF84C22A)				PORT 0
			4 kbytes
	BUFFER						BUFFER
			(PCF84C42A)
	PORT 1		DECODE				PORT 0
	FLIP-FLOPS						FLIP-FLOPS
INTERNAL		MEMORY
		BANK
CLOCK
		FLIP-FLOPS
FREQ.
30
32	TIMER/		HIGHER	LOWER		PROGRAM
	EVENT		PROGRAM	PROGRAM		STATUS
	COUNTER		COUNTER	COUNTER		WORD
	TEST 1
	5		5	8	8	8	8
8	8	8	8			8	8

4

INTERRUPT

ACCUMULATOR

TEMPORARY

TEMPORARY

MULTIPLEXER

LOGIC

REGISTER 1

REGISTER 2

REGISTER 0

REGISTER 1

RAM

ADDRESS

REGISTER 2

timer interrupt

REGISTER

REGISTER 3

ARITHMETIC

INSTRUCTION

REGISTER 4

LOGIC UNIT

REGISTER

REGISTER 5

&

D

REGISTER 6

DECODER

E

REGISTER 7

C

8 LEVEL STACK

O

D

(VARIABLE LENGTH)

INT / T0

(8)

E

OPTIONAL SECOND

external interrupt

TEST 1

REGISTER BANK

CONDITIONAL

TIMER

DECIMAL

BRANCH

FLAG

ADJUST

DATA STORE

STOP

LOGIC

CARRY

ACC

CONTROL & TIMING

IDLE

ACC BIT

RESIDENT RAM ARRAY

INT / T0

RESET

XTAL 1

XTAL 2

TEST

64 bytes

pagewidth

MBC951

INTERRUPT

INITIALIZE

OSCILLATOR

full

Fig.1 Block diagram ofhandbook, PCF84C12A.

DIAGRAM BLOCK 4

microcontroller bit-8

PCF84C12A

Semiconductors Philips

specification Product

Philips Semiconductors

Product specification

8-bit microcontroller

PCF84C12A

5

PINNING INFORMATION

5.2 Pin description

5.1

Pinning

Table 1 DIP20 and SO20 packages

SYMBOL

PIN

TYPE

DESCRIPTION

handbook, halfpage

VDD

P0.0 to P0.7

1 to 8

I/O

Port 0: 8-bit

P0.0

1

20

quasi-bidirectional

P0.1

2

19

P1.4

I/O port

9

I

Interrupt/Test 0

P0.2

3

18

P1.3

INT/T0

P0.3

4

17

P1.2

VSS

10

P

ground

T1

11

I

Test 1/count input of

P0.4

5

16

P1.1

PCF84C12A

8-bit timer/event

6

15

counter 1

P0.5

P1.0

P0.6

7

14

RESET

XTAL1

12

I

crystal oscillator

P0.7

8

13

XTAL2

input or external

clock input

INT/T0

9

12

XTAL1

XTAL2

13

O

crystal oscillator

VSS

10

11

T1

output

RESET

14

I

reset input

MBK778

P1.0 to P1.4

15 to 19

I/O

Port 1: 4-bit

quasi-bidirectional

Fig.2 Pin configuration.

I/O port

VDD

20

P

positive supply

6 INSTRUCTION SET

Since the I2C-bus interface, Port 2 and derivative logic are not provided, instructions associated with these functions are not available.

ROM space is restricted to 1 kbyte for the PCF84C12A. Therefore, the instructions SEL MB1/2/3 should be avoided as they would define non-existing program memory banks.

As RAM space is limited to 64 bytes, care should be taken to avoid accesses to non-existing RAM locations.

Refer to the “PCF84CxxxA family” data sheet, for a complete description of the instruction set.

1998 May 11

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