P87C554 datasheet(3/77 Pages) PHILIPS

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Philips Semiconductors

Product data

P87C554

80C51 8-bit microcontroller – 12 clock operation

16K/512 OTP/RAM, 8 channel 10-bit A/D, I2C, PWM,

capture/compare, high I/O

2002 Mar 25

853-2324 27926

DESCRIPTION

The P87C554 Single-Chip 8-Bit Microcontroller is manufactured in

an advanced CMOS process and is a derivative of the 80C51

microcontroller family. The 87C554 has the same instruction set as

the 80C51.

The 87C554 contains a 16k

× 8 non-volatile EPROM, a 512 × 8

read/write data memory, five 8-bit I/O ports, one 8-bit input port, two

16-bit timer/event counters (identical to the timers of the 80C51), an

additional 16-bit timer coupled to capture and compare latches, a

15-source, four-priority-level, nested interrupt structure, an 8-input

ADC, a dual DAC pulse width modulated interface, two serial

interfaces (UART and I2C-bus), a “watchdog” timer and on-chip

oscillator and timing circuits. For systems that require extra

capability, the P87C554 can be expanded using standard TTL

compatible memories and logic.

In addition, the P87C554 has two software selectable modes of

power reduction—idle mode and power-down mode. The idle mode

freezes the CPU while allowing the RAM, timers, serial ports, and

interrupt system to continue functioning. Optionally, the ADC can be

operated in Idle mode. The power-down mode saves the RAM

contents but freezes the oscillator, causing all other chip functions to

be inoperative.

The device 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, 45 two-byte, and 17 three-byte. With a 16 MHz crystal,

58% of the instructions are executed in 0.75

µs and 40% in 1.5 µs.

Multiply and divide instructions require 3

µs.

FEATURES

• 80C51 central processing unit

• 16k × 8 EPROM expandable externally to 64k bytes

• An additional 16-bit timer/counter coupled to four capture registers

and three compare registers

• Two standard 16-bit timer/counters

• 512 × 8 RAM, expandable externally to 64k bytes

• Capable of producing eight synchronized, timed outputs

• A 10-bit ADC with eight multiplexed analog inputs

• Fast 8-bit ADC option

• Two 8-bit resolution, pulse width modulation outputs

• Five 8-bit I/O ports plus one 8-bit input port shared with analog

inputs

• I2C-bus serial I/O port with byte oriented master and slave

functions

• On-chip watchdog timer

• Extended temperature ranges

• Full static operation – 0 to 16 MHz

• Operating voltage range: 2.7 V to 5.5 V (0 to 16 MHz) and

4.5 V to 5.5 V (16 to 33 MHz)

• Three security bits

• Encryption array – 64 bytes

• 4 level priority interrupt

• 15 interrupt sources

• Full-duplex enhanced UART

– Framing error detection

– Automatic address recognition

• Power control modes

– Clock can be stopped and resumed

– Idle mode

– Power down mode

• Second DPTR register

• ALE inhibit for EMI reduction

• Programmable I/O pins

• Wake-up from power-down by external interrupts

• Software reset

• Power-on detect reset

• ADC charge pump disable

• ONCE mode

• ADC active in Idle mode

P87C554 Datasheet(PDF) 3 Page - NXP Semiconductors

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