Datasheet > 80C51BHP

80C51BHP

更新时间： 2024-02-18 13:36:24

品牌	Logo	应用领域
英特尔 - INTEL		微控制器
页数	文件大小	规格书
21页	285K
描述
CHMOS SINGLE-CHIP 8-BIT MICROCONTROLLER

阅读下载

获取价格

技术参数
数据手册

如果您发现信息不准确，欢迎纠错

80C51BHP 技术参数

生命周期：	Active	包装说明：	,
Reach Compliance Code：	unknown	HTS代码：	8542.31.00.01
风险等级：	5.57	技术：	CMOS
uPs/uCs/外围集成电路类型：	MICROCONTROLLER	Base Number Matches：	1

80C51BHP 数据手册

87C51/80C51BH/80C31BH

IDLE MODE

the on-chip RAM. An external interrupt allows both

the SFRs and on-chip RAM to retain their values.

In Idle Mode, the CPU puts itself to sleep while all

the on-chip peripherals remain active. The mode is

invoked by software. The content of the on-chip

RAM and all the Special Functions Registers remain

unchanged during this mode. The Idle Mode can be

terminated by any enabled interrupt or by a hard-

ware reset.

To properly terminate Power Down, the reset or ex-

ternal interrupt should not be executed before V is

restored to its normal operating level, and must be

held active long enough for the oscillator to restart

and stabilize (normally less than 10 ms).

With an external interrupt INT0 and INT1 must be

enabled and configured as level-sensitive. Holding

the pin low restarts the oscillator but bringing the pin

back high completes the exit. Once the interrupt is

serviced, the next instruction to be executed after

RET1 will be the one following the instruction that

put the device into Power Down.

It should be noted that when Idle is terminated by a

hardware reset, the device normally resumes pro-

gram execution, from where it left off, up to two ma-

chine cycles before the internal reset algorithm

takes control. On-chip hardware inhibits access to

internal RAM in this event, but access to the port

pins is not inhibited. To eliminate the possibility of an

unexpected write to a port pin when Idle is terminat-

ed by reset, the instruction following the one that

invokes Idle should not be one that writes to a port

pin or to external memory.

DESIGN CONSIDERATIONS

Exposure to light when the device is in operation

may cause logic errors. For this reason, it is sug-

gested that an opaque label be placed over the

window when the die is exposed to ambient light.

POWER DOWN MODE

The 87C51/BH now have some additional fea-

To save even more power, a Power Down mode can

be invoked by software. In this mode, the oscillator

is stopped and the instruction that invoked Power

Down is the last instruction executed. The on-chip

RAM and Special Function Registers retain their val-

ues until the Power Down mode is transmitted.

tures. The features are: asynchronous port reset,

4 interrupt priority levels, power off flag, ALE dis-

able, serial port automatic address recognition,

serial port framing error detection, 64-byte en-

cryption array, and 3 program lock bits. These

features cannot be used with the older versions

of 80C51BH/80C31BH. The newer version of

80C51BH/80C31BH will have change identifier

‘‘A’’ appended to the lot number.

On the 87C51/BH either a hardware reset or an ex-

ternal interrupt can cause an exit from Power Down.

Reset redefines all the SFR’s but does not change

Table 2. Status of the External Pins during Idle and Power Down

Program

Memory

Mode

Idle

ALE

PSEN

PORT0

PORT1

PORT2

PORT3

Internal

External

Internal

External

Data

Float

Data

Float

Data

Address

Data

Idle

Power Down

Data

1...3 4 567 8 9...21

下载PDF

与80C51BHP相关器件

型号	品牌	描述	获取价格	数据表
80C51FA	INTEL	EVENT-CONTROL CHMOS SINGLE-CHIP 8-BIT MICROCONTROLLER	获取价格
80C51FA	NXP	80C51 8-bit microcontroller family 8K.64K/256.1K OTP/ROM/ROMless, low voltage 2.7V.5.5V, l	获取价格
80C51FAMILY	NXP	80C51 8-bit microcontroller family	获取价格
80C51GB	INTEL	CHMOS SINGLE-CHIP 8-BIT MICROCONTROLLER	获取价格
80C51RA	NXP	8-bit CMOS (low voltage, low power and high speed) microcontroller families	获取价格
80C51RA+	NXP	80C51 8-bit microcontroller family 8K.64K/256.1K OTP/ROM/ROMless, low voltage 2.7V.5.5V, l	获取价格

与80C51BHP相关文章

PCF8574资料解读：主要参数分析、引脚说明
2024-05-21

7
AD637数据手册解读：主要特性、引脚及其功能解读、电气参数
2024-05-21

6
ADUM1201资料手册解读：参数分析、引脚说明、应用分析
2024-05-21

9
一文带你了解压敏电阻器在直流电路中的过压保护作用
2024-05-21

5

产品中心

服务支持

精选活动

关于我们

帮助中心

80C51BHP

80C51BHP 技术参数

80C51BHP 数据手册

与80C51BHP相关器件

与80C51BHP相关文章

您还可以找

产品中心

服务支持

精选活动

关于我们

帮助中心

80C51BHP

80C51BHP 技术参数

80C51BHP 数据手册

与80C51BHP相关器件

与80C51BHP相关文章

您还可以找

您在本页遇到什么问题？