Datasheet > BP87C51FA12

BP87C51FA12

更新时间： 2024-02-04 20:11:39

品牌	Logo	应用领域
英特尔 - INTEL		可编程只读存储器时钟微控制器光电二极管外围集成电路
页数	文件大小	规格书
18页	254K
描述
Microcontroller, 8-Bit, OTPROM, 12MHz, CMOS, PDIP40, PLASTIC, DIP-40

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技术参数
数据手册

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BP87C51FA12 技术参数

生命周期：	Obsolete	零件包装代码：	DIP
包装说明：	DIP,	针数：	40
Reach Compliance Code：	unknown	HTS代码：	8542.31.00.01
风险等级：	5.8	具有ADC：	NO
地址总线宽度：	16	位大小：	8
最大时钟频率：	12 MHz	DAC 通道：	NO
DMA 通道：	NO	外部数据总线宽度：	8
JESD-30 代码：	R-PDIP-T40	长度：	52.26 mm
I/O 线路数量：	32	端子数量：	40
最高工作温度：	125 °C	最低工作温度：	-40 °C
PWM 通道：	YES	封装主体材料：	PLASTIC/EPOXY
封装代码：	DIP	封装形状：	RECTANGULAR
封装形式：	IN-LINE	认证状态：	Not Qualified
ROM可编程性：	OTPROM	座面最大高度：	5.08 mm
速度：	12 MHz	最大供电电压：	6 V
最小供电电压：	4 V	标称供电电压：	5 V
表面贴装：	NO	技术：	CMOS
温度等级：	AUTOMOTIVE	端子形式：	THROUGH-HOLE
端子节距：	2.54 mm	端子位置：	DUAL
宽度：	15.24 mm	uPs/uCs/外围集成电路类型：	MICROCONTROLLER
Base Number Matches：	1

BP87C51FA12 数据手册

AUTOMOTIVE 87C51FA/FB/FC/FC-20

Port 2 emits the high-order address byte during

fetches from external Program Memory and during

accesses to external Data Memory that use 16-bit

In normal operation ALE is emitted at a constant

rate of (/6 the oscillator frequency, and may be used

for external timing or clocking purposes. Note, how-

ever, that one ALE pulse is skipped during each ac-

cess to external Data Memory.

addresses (MOVX

DPTR). In this application it

uses strong internal pullups when emitting 1’s. Dur-

ing accesses to external Data Memory that use 8-bit

addresses (MOVX

of the P2 Special Function Register.

Ri), Port 2 emits the contents

Throughout the remainder of this data sheet, ALE

will refer to the signal coming out of the ALE/PROG

pin, and the pin will be referred to as the ALE/PROG

pin.

Some Port 2 pins receive the high-order address bits

during EPROM programming and program verifica-

tion.

PSEN: Program Store Enable is the read strobe to

external Program Memory.

Port 3: Port 3 is an 8-bit bidirectional I/O port with

internal pullups. The Port 3 output buffers can drive

LS TTL inputs. Port 3 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 3

pins that are externally pulled low will source current

When the 87C51FA/FB/FC is executing code from

external Program Memory, PSEN is activated twice

each machine cycle, except that two PSEN activa-

tions are skipped during each access to external

Data Memory.

(I , on the data sheet) because of the pullups.

EA/V

External Access enable. EA must be

strapped to V in order to enable the device to

Port 3 also serves the functions of various special

features of the MCS-51 Family, as listed below:

fetch code from external Program Memory locations

0000H to 0FFFFH. Note, however, that if either of

the Program Lock bits are programmed, EA will be

internally latched on reset.

Port Pin

Alternate Function

RXD (serial input port)

TXD (serial output port)

P3.0

P3.1

P3.2

P3.3

P3.4

P3.5

P3.6

P3.7

EA should be strapped to V

executions.

for internal program

INT0 (external interrupt 0)

INT1 (external interrupt 1)

This pin also receives the programming supply volt-

age (V ) during EPROM programming.

T0 (Timer 0 external input)

T1 (Timer 1 external input)

WR (external data memory write strobe)

RD (external data memory read strobe)

XTAL1: Input to the inverting oscillator amplifier.

XTAL2: Output from the inverting oscillator amplifier.

RST: Reset input. A high on this pin for two machine

cycles while the oscillator is running resets the de-

vice. The port pins will be driven to their reset condi-

OSCILLATOR CHARACTERISTICS

tion when a minimum V

oscillator is running or not. An internal pulldown re-

sistor permits a power-on reset with only a capacitor

is applied, whether the

IH1

XTAL1 and XTAL2 are the input and output, respec-

tively, of an inverting amplifier which can be config-

ured for use as an on-chip oscillator, as shown in

Figure 4. Either a quartz crystal or ceramic resonator

may be used. More detailed information concerning

the use of the on-chip oscillator is available in Appli-

cation Note AP-155, ‘‘Oscillators for Microcontrol-

lers’’, and in Application Note AP-486, ‘‘Oscillator

Design for Microcontrollers’’.

connected to V

ALE/PROG: Address Latch Enable output pulse for

latching the low byte of the address during accesses

to external memory. This pin (ALE/PROG) is also

the program pulse input during EPROM program-

ming for the 87C51FA/FB/FC.

1 2 3 456 7 8...18

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与BP87C51FA12相关器件

型号	品牌	描述	获取价格	数据表
BP87C51FA16	INTEL	Microcontroller, 8-Bit, OTPROM, 16MHz, CMOS, PDIP40, PLASTIC, DIP-40	获取价格
BP87C51FA20	INTEL	Microcontroller, 8-Bit, OTPROM, 20MHz, CMOS, PDIP40, PLASTIC, DIP-40	获取价格
BP87C51FB	INTEL	CHMOS SINGLE-CHIP 8-BIT MICROCONTROLLER	获取价格
BP87C51FB-1	INTEL	Microcontroller, 8-Bit, UVPROM, 8051 CPU, 16MHz, CMOS, PDIP40	获取价格
BP87C51FB12	INTEL	Microcontroller, 8-Bit, OTPROM, 12MHz, CMOS, PDIP40, PLASTIC, DIP-40	获取价格
BP87C51FB16	INTEL	Microcontroller, 8-Bit, OTPROM, 16MHz, CMOS, PDIP40, PLASTIC, DIP-40	获取价格

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