BP87C51FA 查看數據表（PDF） - Intel

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BP87C51FA

CHMOS SINGLE-CHIP 8-BIT MICROCONTROLLER

Intel 

AUTOMOTIVE 87C51FA FB FC FC-20

Port 0 is also the multiplexed low-order address and

data bus during accesses to external Program and

Data Memory In this application it uses strong inter-

nal pullups when emitting 1’s and can source and

sink several LS TTL inputs

Port 0 also receives the code bytes during EPROM

programming and outputs the code bytes during

program verification External pullup resistors are re-

quired during program verification

Port 1 Port 1 is an 8-bit bidirectional I O port with

internal pullups The Port 1 output buffers can drive

LS TTL inputs Port 1 pins that have 1’s written to

them are pulled high by the internal pullups and in

that state can be used as inputs As inputs Port 1

pins that are externally pulled low will source current

(IIL on the data sheet) because of the internal pull-

ups

In addition Port 1 serves the functions of the follow-

ing special features of the 87C51FB FC

Port Pin

P1 0

P1 1

P1 2

P1 3

P1 4

P1 5

P1 6

P1 7

Alternate Function

T2 (External Count Input to

Timer Counter 2)

T2EX (Timer Counter 2 Capture

Reload Trigger and Direction Control)

ECI (External Count Input to the PCA)

CEX0 (External I O for Compare

Capture Module 0)

CEX1 (External I O for Compare

Capture Module 1)

CEX2 (External I O for Compare

Capture Module 2)

CEX3 (External I O for Compare

Capture Module 3)

CEX4 (External I O for Compare

Capture Module 4)

Port 1 receives the low-order address bytes during

EPROM programming and verifying

Port 2 Port 2 is an 8-bit bidirectional I O port with

internal pullups The Port 2 output buffers can drive

LS TTL inputs Port 2 pins that have 1’s written to

them are pulled high by the internal pullups and in

that state can be used as inputs As inputs Port 2

pins that are externally pulled low will source current

(IIL on the data sheet) because of the internal pull-

ups

PACKAGES

Part

87C51FA FB FC

Prefix

P

N

Package Type

40-Pin Plastic DIP

44-Pin PLCC

DIP

PAD (PLCC)

270961 – 3

EPROM only

Do not connect reserved pins

270961 – 4

Diagrams are for pin reference only Package sizes are

not to scale

Figure 3 Pin Connections (Top View)

4

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