P87LPC761 datasheet(4/58 Pages) PHILIPS

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Philips Semiconductors

Preliminary data

P87LPC761

Low power, low price, low pin count (16 pin)

microcontroller with 2 kbyte OTP

2002 Mar 07

GENERAL DESCRIPTION

The P87LPC761 is a 16-pin single-chip microcontroller designed for

low pin count applications demanding high-integration, low cost

solutions over a wide range of performance requirements. A

member of the Philips low pin count family, the P87LPC761 offers

programmable oscillator configurations for high and low speed

crystals or RC operation, wide operating voltage range,

programmable port output configurations, selectable Schmitt trigger

inputs, LED drive outputs, and a built-in watchdog timer. The

P87LPC761 is based on an accelerated 80C51 processor

architecture that executes instructions at twice the rate of standard

80C51 devices.

FEATURES

• An accelerated 80C51 CPU provides instruction cycle times of

300–600ns for all instructions except multiply and divide when

executing at 20 MHz. Execution at up to 20 MHz when

VDD = 4.5 V to 6.0 V, 10 MHz when VDD = 2.7 V to 6.0 V

• 2.7 V to 6.0 V operating range for digital functions

• 2 kbytes EPROM code memory

• 128 byte RAM data memory

• 32-byte customer code EPROM allows serialization of devices,

storage of setup parameters, etc

• Two 16-bit counter/timers. One timer may be configured to toggle

a port output upon timer overflow

• Two analog comparators

• Full duplex UART

• I2C communication port

• Six keypad interrupt inputs, plus two additional external interrupt

inputs

• Four interrupt priority levels

• Watchdog timer with separate on-chip oscillator, requiring no

external components. The watchdog timeout time is selectable

from 8 values

• Active low reset. On-chip power-on reset allows operation with no

external reset components

• Low voltage reset. One of two preset low voltage levels may be

selected to allow a graceful system shutdown when power fails.

May optionally be configured as an interrupt

• Oscillator Fail Detect. The watchdog timer has a separate fully

on-chip oscillator, allowing it to perform an oscillator fail detect

function

• Configurable on-chip oscillator with frequency range and RC

oscillator options (selected by user programmed EPROM bits).

The RC oscillator option allows operation with no external

oscillator components

• Programmable port output configuration options:

quasi-bidirectional, open drain, push-pull, input-only

• Selectable Schmitt trigger port inputs

• LED drive capability (20 mA) on all port pins

• Controlled slew rate port outputs to reduce EMI. Outputs have

approximately 10 ns minimum ramp times

• 11 I/O pins minimum. Up to 14 I/O pins using on-chip oscillator

and reset options

• Only power and ground connections are required to operate the

P87LPC761 when fully on-chip oscillator and reset options are

selected

• Serial EPROM programming allows simple in-circuit production

coding. Two EPROM security bits prevent reading of sensitive

application programs

• Idle and Power Down reduced power modes. Improved wakeup

from Power Down mode (a low interrupt input starts execution).

Typical Power Down current is 1

µA

• 16-pin DIP and TSSOP packages

ORDERING INFORMATION

Package

Type number

Name

Description

Frequency

Temperature

Range (

°C)

Version

P87LPC761BDH

TSSOP16

Plastic thin shrink small outline package; 16 leads; body

width 4.4 mm

20 MHz (5 V),

10 MHz (3 V)

0 to +70

SOT403-1

P87LPC761BN

DIP16

Plastic dual in-line package; 16 leads (300 mil); long body

20 MHz (5 V),

10 MHz (3 V)

0 to +70

SOT38-1

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