Philips pcf84c85 DATASHEETS

INTEGRATED CIRCUITS

DATA SH EET

PCF84C85A

Microcontroller with extended I/O

Product specification
Supersedes data of May 1994
File under Integrated Circuits, IC14

1996 Nov 21

Philips Semiconductors Product specification

Microcontroller with extended I/O PCF84C85A

CONTENTS

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

5.1 Pinning

5.2 Pin description
6 PARALLEL PORTS
7 INSTRUCTION SET
8 SUMMARY OF DERIVATIVE PORTS AND

REGISTERS
9 ROM MASK OPTIONS
10 HANDLING
11 LIMITING VALUES
12 DC CHARACTERISTICS
13 AC CHARACTERISTICS

13.1 I2C-bus interface characteristics
14 PACKAGE OUTLINES
15 SOLDERING

15.1 Introduction

15.2 DIP

15.2.1 Soldering by dipping or by wave

15.2.2 Repairing soldered joints

15.3 SO and VSO

15.3.1 Reflow soldering

15.3.2 Wave soldering

15.3.3 Repairing soldered joints
16 DEFINITIONS
17 LIFE SUPPORT APPLICATIONS
18 PURCHASE OF PHILIPS I2C COMPONENTS

1996 Nov 21 2

Philips Semiconductors Product specification

Microcontroller with extended I/O PCF84C85A

1 FEATURES

• 8-bit CPU, ROM, RAM, I/O in a single 40-lead package

• 8 kbytes ROM

• 256 bytes RAM

• I2C-bus interface with multi-master capability

• Over 100 instructions (based on MAB8048)

all of 1 or 2 cycles

• 32 quasi-bidirectional I/O port lines

• 8-bit programmable timer/event counter 1

• Three single-level vectored interrupts:

– external
– 8-bit programmable timer/event counter 1

2

C-bus

–I

• Two test inputs, one of which also serves as the external

interrupt input

• Stop and Idle modes

• Logic supply voltage: VDD= 2.5 to 5.5 V

• Clock frequency: 1 to 16 MHz

• Operating temperature: −40 to +85 °C

• Manufactured in silicon gate CMOS process.

2 GENERAL DESCRIPTION

This data sheet details the specific properties of the
PCF84C85A. The shared properties of the PCF84CxxxA
family of microcontrollers are described in the

“PCD84xxxA family”

conjunction with this publication.
The PCF84C85A is a general purpose CMOS

microcontroller with emphasis on input/output. It provides
32 I/O port lines, 8 kbytes of program memory and
256 bytes of RAM. In addition to the 32 I/O port lines, the
microcontroller provides an on-chip I
two-line serial bus extends the microcontroller's
capabilities when implemented with the powerful I2C-bus
peripherals.These include LCD drivers, telecom circuits,
AD/DA converters, clock/calendar circuits, EEPROM and
RAM and are listed in

Peripherals”

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

.

data sheet which should be read in

2

C-bus interface. This

“Data Handbook IC12, I2C

“PCF84CXXXA family”

data

3 ORDERING INFORMATION (see note 1)

TYPE

NUMBER

PCF84C85AP DIP40 plastic dual in-line package; 40 leads (600 mil) SOT 129-1
PCF84C85AT VSO40 plastic very small outline package; 40 leads SOT 158-1

Note

1. Please refer to the Order Entry Form (OEF) for this device for the full type number to use when ordering. This type

number will also specify the required program and the ROM mask options.

NAME DESCRIPTION VERSION

PACKAGE

1996 Nov 21 3

Philips Semiconductors Product specification

Microcontroller with extended I/O PCF84C85A

4 BLOCK DIAGRAM

8

DERIVATIVE

DP1.0 to DP1.6

8

DERIVATIVE

DP0.0 to DP0.7

PORT 0

P0.0 to P0.7

8 kbytes

DECODE

RESIDENT ROM

8 8

PORT 1

P1.0 to P1.7

PORT 1

BUFFER

DERIVATIVE

PORT 0

BUFFER

DERIVATIVE

BUFFER

PORT 0

BUFFER

PORT 1

PORT 1

FLIP-FLOPS

PORT 0

FLIP-FLOPS

FLIP-FLOPS

INTERNAL

FLIP-FLOPS

BANK

MEMORY

FLIP-FLOPS

FREQ.

CLOCK

30

WORD

STATUS

PROGRAM

LOWER

COUNTER

PROGRAM

HIGHER

COUNTER

PROGRAM

EVENT

TIMER/

COUNTER

32

T1

8

8

8

5 888 8

88 8

8

8

8

8

REGISTER 0

REGISTER 1

REGISTER 2

MULTIPLEXER

RAM

ADDRESS

REGISTER 1

TEMPORARY

REGISTER 2

TEMPORARY

REGISTER 3

REGISTER 4

REGISTER 5

REGISTER 6

DECOD

REGISTER

&

REGISTER

INSTRUCTION

LOGIC UNIT

ARITHMETIC

REGISTER 7

8-LEVEL STACK

(VARIABLE LENGTH)

DECODER

DATA STORE

REGISTER BANK

OPTIONAL SECOND

E

FLAG

T1

INT / T0

TIMER

BRANCH

CONDITIONAL

ADJUST

DECIMAL

MLA596

256 bytes

RESIDENT RAM ARRAY

TEST

CARRY

ACC

ACC BIT

LOGIC

XTAL 2XTAL 1RESETINT / T0

XTAL

OSCILLATOR

CONTROL & TIMING

INTERRUPT INITIALIZE

handbook, full pagewidth

Fig.1 Block diagram.

SDA/P2.3

SCLK

1996 Nov 21 4

PORT 2

BUFFER

CLOCK DATA

PORT 2

FLIP-FLOPS

C-BUS

2

I

INTERFACE

1

8

ACCUMULATOR

timer interrupt

8

LOGIC

INTERRUPT

SIO/

derivative

interrupt

external interrupt

STOP

IDLE

Philips Semiconductors Product specification

Microcontroller with extended I/O PCF84C85A

5 PINNING INFORMATION

5.1 Pinning

handbook, halfpage

INT / T0

XTAL1
XTAL2

P0.0
P0.1

P0.2
P0.3
P0.4
P0.5
P0.6
P0.7
P1.0
P1.1
P1.2
P1.3
P1.4

P1.5

P1.6

P1.7

V

SS

1
2
3
4
5
6
7
8
9

10

PCF84C85A

11
12

13

15
16
17
18
19
20

Fig.2 Pin configuration.

MLA597

40
39
38
37
36
35
34
33
32
31
30
29
28
2714
26
25
24
23
22
21

V

DD

T1
SCLK

SDA / P2.3
DP1.6

DP1.5

DP1.4
DP1.3

DP1.2
DP1.1

DP1.0
DP0.7
DP0.6

DP0.5
DP0.4
DP0.3

DP0.2
DP0.1
DP0.0
RESET

5.2 Pin description
Table 1 DIP40 and VSO40 packages.

SYMBOL PIN TYPE DESCRIPTION

INT/T0 1 I Interrupt/Test 0
P0.0 to P0.7 2 to 9 I/O 8 bits of Port 0: 8-bit

quasi-bidirectional
I/O port

P1.0 to P1.7 10 to 17 I/O 8 bits of Port 1: 8-bit

quasi-bidirectional
I/O port

XTAL1 18 I XTAL input: crystal

oscillator/external
clock input

XTAL2 19 O XTAL output: crystal

oscillator output

V

SS

20 P ground
RESET 21 I Reset input
DP0.0 to

DP0.7

22 to 29 I/O Derivative Port 0:

quasi-bidirectional
I/O port (8-bit)

DP1.0 to
DP1.6

30 to 36 I/O Derivative Port 1:

quasi-bidirectional
I/O lines (7-bit)

SDA/P2.3 37 I/O bidirectional data line

2

of the I

C-bus
interface; or Port 2
quasi-bidirectional
I/O port (1 bit only)

SCLK 38 I/O bidirectional clock

2

line of the I

C-bus

interface

T1 39 I Test 1: count input of

8-bit timer/event
counter 1

V

DD

40 P positive supply

6 PARALLEL PORTS

Of the standard quasi-bidirectional I/O ports, Port 2 is
incomplete, providing only line SDA/P2.3 that is shared
with the I2C-bus interface. In addition to the standard ports,
two derivative I/O ports are available:

• Derivative Port of 8 lines (DP0.0 to DP0.7)

• Derivative Port of 7 lines (DP1.0 to DP1.6).

Missing bits of incomplete ports, i.e. P2.0 to P2.2 and
DP1.7, are fixed at zero in the corresponding registers.

1996 Nov 21 5

7 INSTRUCTION SET

See

“PCF84CXXXA family”

data sheet for a complete

description of the instruction set.

Philips Semiconductors Product specification

Microcontroller with extended I/O PCF84C85A

8 SUMMARY OF DERIVATIVE PORTS AND REGISTERS
Table 2 Derivative Ports.

DERIVATIVE

ADDRESS

00H R DP0L Derivative Port 0 lines
01H R DP1L Derivative Port 1 lines
02H R/W DP0FF Derivative Port 0 flip-flops
03H R/W DP1FF Derivative Port 1 flip-flops
04H −−

Table 3 Derivative Registers.

REGISTER

MNEMONIC

DP0L D0.7 D0.6 D0.5 D0.4 D0.3 D0.2 D0.1 D0.0
DP1L 0 D1.6 D1.5 D1.4 D1.3 D1.2 D1.1 D1.0
DP0FF F0.7 F0.6 F0.5 F0.4 F0.3 F0.2 F0.1 F0.0
DP1FF 0 F1.6 F1.5 F1.4 F1.3 F1.2 F1.1 F1.0

9 ROM MASK OPTIONS

Program/data Any mix of instructions and data up to ROM size of

TYPE

76543210

ROM CODE OPTION

REGISTER

MNEMONIC

DESCRIPTION

8 kbytes.

Port Output

P0.0 to P0.7 standard open-drain push-pull
P1.0 to P1.7 standard open-drain push-pull
SDA/P2.3 − open-drain −
DP0.0 to DP0.7 standard open-drain push-pull
DP1.0 to DP1.7 standard open-drain push-pull

Port State after reset

P0.0 to P0.7 set reset −
P1.0 to P1.7 set reset −
SDA/P2.3 set −−
DP1.0 to DP1.7 set reset −
DP2.0 to DP2.2 set reset −

Oscillator

Transconductance LOW (g

) MEDIUM (gmM) HIGH (gmH)

mL

1996 Nov 21 6