Philips p83cl781 DATASHEETS

INTEGRATED CIRCUITS

DATA SH EET

P83CL781; P83CL782

Low voltage 8-bit microcontrollers

Product specification
File under Integrated Circuits, IC20

1995 Jul 13

Philips Semiconductors Product specification

Low voltage 8-bit microcontrollers P83CL781; P83CL782

CONTENTS

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

5.1 Pinning

5.2 Pin description
6 FUNCTIONAL DESCRIPTION

6.1 General

6.2 CPU timing

6.3 Memory organization

6.4 Addressing

6.5 I/O facilities

6.6 Timer/event counters

6.7 Idle and Power-down operation

6.8 I2C-bus serial I/O

6.9 Standard serial interface SIO0: UART

6.10 Baud rates

6.11 Interrupt system

6.12 Oscillator circuitry

6.13 Reset
7 INSTRUCTION SET

7.1 Instruction Map
8 LIMITING VALUES
9 DC CHARACTERISTICS
10 AC CHARACTERISTICS

10.1 Program memory

10.2 External data memory
11 PACKAGE OUTLINES
12 SOLDERING

12.1 Introduction

12.2 DIP

12.3 QFP
13 DEFINITIONS
14 LIFE SUPPORT APPLICATIONS
15 PURCHASE OF PHILIPS I2C COMPONENTS

1995 Jul 13 2

Philips Semiconductors Product specification

Low voltage 8-bit microcontrollers P83CL781; P83CL782

1 FEATURES

• Full static 80C51 CPU

• 8-bit CPU, ROM, RAM, I/O in a 40 lead DIP or 44 lead

QFP package

• 16 kbytes ROM, expandable externally to 64 kbytes

• 256 bytes RAM, expandable externally to 64 kbytes

• Four 8-bit ports, 32 I/O lines

• Three 16-bit timer/event counters

• External memory expandable up to 128 kbytes external

ROM up to 64 kbytes and/or RAM up to 64 kbytes

• On-chip oscillator suitable for RC, LC, quartz crystal or
ceramic resonator

• Fifteen source, fifteen vector interrupt structure with two
priority levels

• Full duplex serial port (UART)

2

C-bus interface for serial transfer on two lines

• I

• Enhanced architecture with:

– non-page oriented instructions
– direct addressing
– four 8 byte RAM register banks
– stack depth limited only by available internal RAM

(maximum 256 bytes)

– multiply, divide, subtract and compare instructions

• Power-down and Idle modes

• Wake-up via external interrupts at Port 1

• Single supply voltage of 1.8 to 6.0 V

• Frequency range of DC to 12 MHz

• Very low current consumption

• Operating temperature:

– 83CL781: −40 to +85 °C
– 83CL782: −25 to +55 °C.

2 GENERAL DESCRIPTION

The term P83CL781 is used throughout this data sheet to
refer to both the P83CL781 and P83CL782; differences
between the devices are highlighted in the text.

The P83CL781 is manufactured in an advanced CMOS
technology. The instruction set of the P83CL781 is based
on that of the 8051. The P83CL781 is an 8-bit general
purpose microcontroller especially suited for cordless
telephone applications. The device has low power
consumption and a wide range of supply voltage. For
emulation purposes, the P85CL781 (Piggy-back version)
with 256 bytes of RAM is recommended. The P83CL781
has two software selectable modes of reduced activity for
further power reduction: Idle and Power-down. The
P83CL781 also functions as an arithmetic processor
having facilities for both binary and BCD arithmetic plus
bit-handling capabilities. The instruction set consists of
over 100 instructions: 49 one-byte, 46 two-byte, and
16 three-byte.

The P83CL782 is a faster version of the P83CL781 and
operates at a maximum frequency of 12 MHz at

≥ 3.1 V.

V

DD

This data sheet details the specific properties of the
P83CL781; for details of the P83CL781 core and all the
I2C-bus functions see

“Data Handbook IC20”

.
This handbook may be ordered using the code
9398 181 30011.

3 ORDERING INFORMATION

TYPE NUMBER

P83CL781HFP DIP40 plastic dual in-line package; 40 leads (600 mil) SOT129-1
P83CL782HDP
P83CL781HFH QFP44
P83CL782HDH
P83CL781HFH QFP44
P83CL781HDH

Note

1. When using IR reflow soldering it is recommended that the Dry Packing instructions in the

Pocketbook”

(order number 9398 510 34011) are followed.

1995 Jul 13 3

PACKAGE

NAME DESCRIPTION VERSION

(1)

plastic quad flat package; 44 leads (lead length 2.35 mm);

SOT205-1

body 14 × 14 ×2.2 mm

(1)

plastic quad flat package; 44 leads (lead length 1.3 mm);

SOT307-2

body 10 × 10 × 1.75 mm

“Quality Reference

Philips Semiconductors Product specification

Low voltage 8-bit microcontrollers P83CL781; P83CL782

4 BLOCK DIAGRAM

handbook, full pagewidth

XTAL1

XTAL2

EA

ALE

PSEN

WR

RD

RST

AD0 to 7

A8 to 15

T0 T1 INT0 INT1

3 3 3 3

16-BIT
TIMER/
EVENT

COUNTERS

P83CL580

excluding

ROM/RAM

3

3

CPU

core

PROGRAM

MEMORY

16 kbyte

ROM

8-bit internal bus

P83CL781

DATA

MEMORY

256 byte

RAM

MLA601

V

DD

P83CL782

PARALLEL

0

2

I/O PORTS

AND

EXTERNAL

BUS

SERIAL

UART
PORT

16-BIT
TIMER/
EVENT

COUNTER

2

I C

INTERFACE

V

SS

RXDTXDP3P2P1P0

0

alternative function of Port 0

1

alternative functions of Port 1

2

alternative function of Port 2

3

alternative function of Port 3

Fig.1 Block diagram.

1995 Jul 13 4

33 1

T2

1

T2EX

1 1

SDASCL

Philips Semiconductors Product specification

Low voltage 8-bit microcontrollers P83CL781; P83CL782

5 PINNING INFORMATION

5.1 Pinning

P1.0/INT2/T2

P1.1/INT3/T2EX

P1.2/INT4
P1.3/INT5
P1.4/INT6
P1.5/INT7

P1.6/INT8/SCL

P1.7/INT9/SDA

RST

P3.0/RXD/data

P3.1/TXD/clock

P3.2/INT0

P3.3/INT1

P3.4/T0

P3.5/T1

P3.6/WR

P3.7/RD

XTAL2
XTAL1

V

SS

1
2
3
4
5
6
7
8

9
10
11
12
13
14
15
16

17
18
19
20

P83CL781
P83CL782

MLA603

40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21

V

DD

P0.0/AD0
P0.1/AD1
P0.2/AD2
P0.3/AD3
P0.4/AD4
P0.5/AD5
P0.6/AD6
P0.7/AD7
EA
ALE
PSEN
P2.7/A15
P2.6/A14
P2.5/A13
P2.4/A12
P2.3/A11
P2.2/A10
P2.1/A9
P2.0/A8

1995 Jul 13 5

Fig.2 Pin configuration for DIP package.

Philips Semiconductors Product specification

Low voltage 8-bit microcontrollers P83CL781; P83CL782

handbook, full pagewidth

DD

n.c.

P1.0/INT2/T2

P1.3/INT5

P1.4/INT6
44

43

P1.1/INT3/T2EX

P1.2/INT4
42

41

40

P0.0/AD0

V

39

38

37

P0.2/AD2

P0.1/AD1
36

35

P0.3/AD3
34

P1.5/INT7

P1.6/INT8/SCL

P1.7/INT9/SDA

RST

P3.0/RXD/data

n.c.

P3.1/TXD/clock

P3.2/INT0
P3.3/INT1

P3.4/T0
P3.5/T1

1
2
3
4
5

14

XTAL2

P83CL781
P83CL782

15

16

SS

V

XTAL1

17

18

SS

TEST/V

19

P2.0/A8

P2.1/A9

20

21

P2.2/A10

P2.3/A11

6
7
8

9
10
11

12

13

P3.7/RD

P3.6/WR

22

P2.4/A12

33
32
31
30
29
28
27
26
25
24
23

MLA604

P0.4/AD4
P0.5/AD5
P0.6/AD6
P0.7/AD7
EA
n.c.
ALE
PSEN
P2.7/A15
P2.6/A14
P2.5/A13

1995 Jul 13 6

Fig.3 Pin configuration for QFP packages.

Philips Semiconductors Product specification

Low voltage 8-bit microcontrollers P83CL781; P83CL782

5.2 Pin description
Table 1 QFP packages (SOT205 and SOT307)

SYMBOL PIN DESCRIPTION

P1.0/INT2/T2 40 Port 1: 8-bit bidirectional I/O port with alternative functions. Port pins that have logic 1s
P1.1/INT3/T2EX 41
P1.2/INT4 42
P1.3/INT5 43
P1.4/INT6 44
P1.5/INT7 1
P1.6/INT8/SCL 2
P1.7/INT9//SDA 3
RST 4 Reset: A HIGH level on this pin for two machine cycles while the oscillator is running,

n.c. 6 Not connected.
P3.0/RXD/data 5 Port 3: 8-bit bidirectional I/O port with alternative functions. Port pins that have logic 1s
P3.1/TXD/clock 7
P3.2/INT0 8

INT1 9

P3.3/
P3.4/T0 10
P3.5/T1 11

WR 12

P3.6/

RD 13

P3.7/
XTAL2 14 Crystal Output: Output of the inverting amplifier that forms the oscillator. Left

XTAL1 15 Crystal Input: Input to the inverting amplifier that forms the oscillator, also the input for

V

SS

TEST/V

SS

P2.0/A8 18 Port 2: 8-bit bidirectional I/O port with alternative functions. Port pins that have logic 1s
P2.1/A9 19
P2.2/A10 20
P2.3/A11 21
P2.4/A12 22
P2.5/A13 23
P2.6/A14 24
P2.7/A15 25

written to them are pulled HIGH by internal pull-ups, and in this state can be used as
inputs. As inputs, Port 1 pins that are externally pulled LOW will source current (I
to the internal pull-ups. Port 1 output buffers can sink/source 4 LS TTL loads. Port 1 also
serves the alternative functions INT2 to INT9 and Timer T2 external input.

resets the device.

written to them are pulled HIGH by internal pull-ups, and in this state can be used as
inputs. As inputs, port pins that are externally pulled LOW will source current (I
the internal pull-ups. Port 3 output buffers can sink/source 4 LS TTL loads. RXD/data is
the serial port receiver data input (asynchronous) or data I/O (synchronous). TXD/clock
is the serial port transmitter data output (asynchronous) or clock output (synchronous).
INT0 and INT1 are external interrupt lines. T0 and T1 are external inputs for Timer 0 and
Timer 1 respectively. WR is the external memory write strobe and RD is the external
memory read strobe.

open-circuit when an external oscillator clock is used.

an externally generated clock source.
16 Ground: Circuit ground potential.
17 Test Input: Must be connected to VSS or left open.

written to them are pulled HIGH by internal pull-ups, and in this state can be used as

inputs. Port 2 output buffers can sink/source 4 LS TTL loads. Port 2 emits the high order

address byte during accesses to external memory that use 16-bit addresses

(MOVX@DPTR). In this application it uses the strong internal pull-ups when emitting

logic 1's. During accesses to external memory that use 8-bit addresses (MOVX@Ri),

Port 2 emits the contents of the P2 Special Function Register.

) due

IL

) due to

IL

1995 Jul 13 7

Philips Semiconductors Product specification

Low voltage 8-bit microcontrollers P83CL781; P83CL782

SYMBOL PIN DESCRIPTION

PSEN 26 Program Store Enable: Read strobe to external program memory. When executing

code out of external program memory, PSEN is activated twice each machine cycle.

However, during each access to external data memory two PSEN activations are

skipped.

ALE 27 Address Latch Enable: Latches the low byte of the address during accesses to external

memory . It is activated every six oscillator periods and may be used for external timing or

clocking purposes.

n.c. 28 Not connected.
EA 29 External Access: When EA is held HIGH, the CPU executes out of the internal program

memory (unless the Program Counter exceeds 3FFFH). When EA is held LOW, the CPU

executes out of external program memory regardless of the value of the program

counter.

P0.7/AD7 30 Port 0: 8-bit open drain bidirectional I/O port with alternative functions. P0.7 to P0.0
P0.6/AD6 31
P0.5/AD5 32
P0.4/AD4 33
P0.3/AD3 34
P0.2/AD2 35
P0.1/AD1 36
P0.0/AD0 37
V

DD

n.c. 39 Not connected.

provide the 8-bit I/O port. As an open-drain output port it can sink/source 8 LS TTL loads.

Port 0 pins that have logic 1s written to them float, and in this state will function as

high-impedance inputs. AD7 to AD0 provide the multiplexed low-order address and data

bus during accesses to external memory. In this application it uses the strong internal

pull-ups when emitting logic 1s.

38 Power supply

1995 Jul 13 8

Philips Semiconductors Product specification

Low voltage 8-bit microcontrollers P83CL781; P83CL782

6 FUNCTIONAL DESCRIPTION

6.1 General

The P83CL781 is a stand-alone high-performance CMOS
microcontroller designed for use in real-time applications
such as instrumentation, industrial control, intelligent
computer peripherals and consumer products. The device
provides hardware features, architectural enhancements
and new instructions to function as a controller for
applications requiring up to 64 kbytes of program memory
and/or up to 64 kbytes of data storage.

The P83CL781 contains a non-volatile 16 kbyte read-only
program memory; a static 256 byte read/write data
memory; 32 I/O lines; three 16-bit timer/event counters; a
fifteen-source two priority-level, nested interrupt structure
and on-chip oscillator and timing circuit.

The device has two software selectable modes of reduced
activity for power reduction; Idle and Power-down. The Idle
mode freezes the CPU while allowing the RAM, timers,
serial I/O and interrupt system to continue functioning. The
Power-down mode saves the RAM contents but freezes
the oscillator causing all other chip functions to be
inoperative.

Two serial interfaces are provided on-chip; a standard
UART serial interface and an I

2

C-bus serial interface. The
I2C-bus serial interface has byte orientated master and
slave functions allowing communication with the whole
family of I2C-bus compatible devices.

6.2 CPU timing

A machine cycle consists of a sequence of 6 states. Each
state lasts for two oscillator periods, thus a machine cycle
takes 12 oscillator periods or 1 µs if the oscillator
frequency is 12 MHz.

6.3 Memory organization

The P83CL781 has a 16 kbyte Program Memory (ROM)
plus 256 bytes of Data Memory (RAM) on-chip. The device
has separate address spaces for Program and Data
Memory (see Fig.4). Using Ports P0 and P2, the
P83CL781 can address up to 64 kbytes of external
memory. The CPU generates both read (RD) and write
(WR) signals for external Data Memory accesses, and the
read strobe (PSEN) for external Program Memory.

6.3.1 P

ROGRAM MEMORY

The P83CL781 contains 16 kbytes of internal ROM. After
reset the CPU begins execution at location 0000H. The
lower 16 kbytes of Program Memory can be implemented
in either on-chip ROM or external memory. If the EA pin is
strapped to VDD, then program memory fetches from
addresses 0000H through to 3FFFH are directed to the
internal ROM. Fetches from addresses 4000H through to
FFFFH are directed to external ROM. Program Counter
values greater than 3FFFH are automatically addressed to
external memory regardless of the state of the

6.3.2 D

ATA MEMORY

EA pin.

The P83CL781 contains 256 bytes of internal RAM and
34 Special Function Registers (SFRs). Figure 4 shows the
internal Data Memory space divided into the lower
128 bytes the upper 128 bytes and the SFR space.
Internal RAM locations 0 to 27 are directly and indirectly
addressable. Internal RAM locations 128 to 255 are only
indirectly addressable. The Special Function Register
locations 128 to 255 bytes are only directly addressable.

6.3.3 S

PECIAL FUNCTION REGISTERS

The upper 128 bytes are the address locations of the
Special Function Registers. Figures 6 and 7 show the
Special Function Registers space. The SFRs include the
port latches, timers, peripheral control, serial I/O registers,
etc. These registers can only be accessed by direct
addressing. There are 128 addressable locations in the
SFR address space (SFRs with addresses divisible by
eight).

6.4 Addressing

The P83CL781 has five methods for addressing source
operands:

• Register

• Direct

• Register-Indirect

• Immediate

• Base-Register plus Index-Register-Indirect.

1995 Jul 13 9

Philips Semiconductors Product specification

Low voltage 8-bit microcontrollers P83CL781; P83CL782

The first three methods can be used for addressing
destination operands. Most instructions have a
‘destination/source’ field that specifies the data type,
addressing methods and operands involved. For
operations other than MOVs, the destination operand is
also a source operand.

Access to memory addressing is as follows:

• Registers in one of the four 8-register banks through

Register Direct or Register-Indirect

• 256 bytes of internal data RAM through Direct or

Register-Indirect

• Special Function Registers through Direct

• External data memory through Register-Indirect

• Program memory look-up tables through Base-Register

plus Index-Register-Indirect.

handbook, full pagewidth

64 kbytes

The P83CL781 is classified as an 8-bit device since the
internal ROM, RAM, Special Function Registers,
Arithmetic Logic Unit and external data bus are all 8-bits
wide. It performs operations on bit, nibble, byte and
double-byte data types.

Facilities are available for byte transfer, logic and integer
arithmetic operations. Data transfer, logic and conditional
branch operations can be performed directly on Boolean
variables to provide excellent bit handling.

16 kbytes

16 kbytes

INTERNAL

(EA = 1)

EXTERNAL

16 kbytes

PROGRAM MEMORY

EXTERNAL

(EA = 0)

OVERLAPPED SPACE

255

(INDIRECT

127

ONLY)

INTERNAL

DATA RAM

0

INTERNAL DATA MEMORY

Fig.4 Memory map.

SPECIAL

FUNCTION

REGISTERS

64 kbytes

MLA605

0

EXTERNAL

DATA MEMORY

1995 Jul 13 10

Philips Semiconductors Product specification

Low voltage 8-bit microcontrollers P83CL781; P83CL782

7FH

30H
2FH

bit-addressable space

(bit addresses 0 to 7F)

20H

R7

1FH

R0
R7

R0
R7

R0
R7

R0

18H
17H

10H
0FH

08H
07H

4 banks of 8 registers

0

MLA560 - 1

(R0 to R7)

Fig.5 The lower 128 bytes of internal RAM.

1995 Jul 13 11

Philips Semiconductors Product specification

Low voltage 8-bit microcontrollers P83CL781; P83CL782

DIRECT

REGISTER

MNEMONIC

BIT ADDRESS

BYTE

ADDRESS (HEX)

FFH
FEH
FDH
FCH

IP1

IX1

IEN1

ACC

S1ADR

S1DAT
S1STA

S1CON

PSW

TH2

TL2

RCAP2H

RCAP2L

T2CON

FEFF FD FC FB FA F9 F8

B

F6F7 F5 F4 F3 F2 F1 F0

EEEF ED EC EB EA E9 E8

E6E7 E5 E4 E3 E2 E1 E0

DEDF DD DC DB DA D9 D8

D6D7 D5 D4 D3 D2 D1 D0

CECF CD CC CB CA C9 C8

F8H

F0H
EFH
EEH
EDH
ECH
EBH
EAH

E9H

E8H

E0H

DBH
DAH
D9H
D8H

D0H
CFH
CEH

CDH
CCH

CBH
CAH
C9H
C8H

SFRs containing

directly addressable

bits

1995 Jul 13 12

IRQ1

C6C7 C5 C4 C3 C2 C1 C0

C0H

MLA606 - 1

Fig.6 Special Function Register memory map (continued in Fig.7).