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参数资料
| 型号： | S80C31BH |
| 厂商： | INTEL CORP |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 8-BIT, 12 MHz, MICROCONTROLLER, PQFP44 |
| 封装： | QFP-44 |
| 文件页数： | 18/21页 |
| 文件大小： | 2233K |
| 代理商： | S80C31BH |
87C51/80C51BH/80C31BH
IDLE MODE
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.
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.
POWER DOWN MODE
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.
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
the on-chip RAM. An external interrupt allows both
the SFRs and on-chip RAM to retain their values.
To properly terminate Power Down, the reset or ex-
ternal interrupt should not be executed before VCC 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.
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.
The 87C51/BH now have some additional fea-
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.
Table 2. Status of the External Pins during Idle and Power Down
Mode
Program
ALE
PSEN
PORT0
PORT1
PORT2
PORT3
Memory
Idle
Internal
1
Data
Idle
External
1
Float
Data
Address
Data
Power Down
Internal
0
Data
Power Down
External
0
Float
Data
6
相关PDF资料 |
PDF描述 |
|---|---|
| S80C51BHP-1 | 8-BIT, MROM, 16 MHz, MICROCONTROLLER, PQFP44 |
| S80C51BH | 8-BIT, MROM, 12 MHz, MICROCONTROLLER, PQFP44 |
| S87C51BH-2 | 8-BIT, OTPROM, 12 MHz, MICROCONTROLLER, PQFP44 |
| MD80C86/883 | 16-BIT, 5 MHz, MICROPROCESSOR, CDIP40 |
| MR80C86-2/883 | 16-BIT, 8 MHz, MICROPROCESSOR, CQCC44 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| S80C31BH-1 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:8-Bit Microcontroller |
| S80C31BH1SF88 | 功能描述:IC MPU 8-BIT 5V 16MHZ 44-MQFP RoHS:否 类别:集成电路 (IC) >> 嵌入式 - 微控制器， 系列:80C 其它有关文件:STM32F101T8 View All Specifications 特色产品:STM32 32-bit Cortex MCUs 标准包装:490 系列:STM32 F1 核心处理器:ARM? Cortex?-M3 芯体尺寸:32-位 速度:36MHz 连通性:I²C，IrDA，LIN，SPI，UART/USART 外围设备:DMA，PDR，POR，PVD，PWM，温度传感器，WDT 输入/输出数:26 程序存储器容量:64KB（64K x 8） 程序存储器类型:闪存 EEPROM 大小:- RAM 容量:10K x 8 电压 - 电源 (Vcc/Vdd):2 V ~ 3.6 V 数据转换器:A/D 10x12b 振荡器型:内部 工作温度:-40°C ~ 85°C 封装/外壳:36-VFQFN，36-VFQFPN 包装:托盘 配用:497-10030-ND - STARTER KIT FOR STM32497-8853-ND - BOARD DEMO STM32 UNIV USB-UUSCIKSDKSTM32-PL-ND - KIT IAR KICKSTART STM32 CORTEXM3497-8512-ND - KIT STARTER FOR STM32F10XE MCU497-8505-ND - KIT STARTER FOR STM32F10XE MCU497-8304-ND - KIT STM32 MOTOR DRIVER BLDC497-6438-ND - BOARD EVALUTION FOR STM32 512K497-6289-ND - KIT PERFORMANCE STICK FOR STM32MCBSTM32UME-ND - BOARD EVAL MCBSTM32 + ULINK-MEMCBSTM32U-ND - BOARD EVAL MCBSTM32 + ULINK2更多... 其它名称:497-9032STM32F101T8U6-ND |
| S80C31BH-24 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:8-Bit Microcontroller |
| S80C31BH24SF88 | 功能描述:IC MPU 8-BIT 5V 24MHZ 44-QFP RoHS:否 类别:集成电路 (IC) >> 嵌入式 - 微控制器， 系列:80C 其它有关文件:STM32F101T8 View All Specifications 特色产品:STM32 32-bit Cortex MCUs 标准包装:490 系列:STM32 F1 核心处理器:ARM? Cortex?-M3 芯体尺寸:32-位 速度:36MHz 连通性:I²C，IrDA，LIN，SPI，UART/USART 外围设备:DMA，PDR，POR，PVD，PWM，温度传感器，WDT 输入/输出数:26 程序存储器容量:64KB（64K x 8） 程序存储器类型:闪存 EEPROM 大小:- RAM 容量:10K x 8 电压 - 电源 (Vcc/Vdd):2 V ~ 3.6 V 数据转换器:A/D 10x12b 振荡器型:内部 工作温度:-40°C ~ 85°C 封装/外壳:36-VFQFN，36-VFQFPN 包装:托盘 配用:497-10030-ND - STARTER KIT FOR STM32497-8853-ND - BOARD DEMO STM32 UNIV USB-UUSCIKSDKSTM32-PL-ND - KIT IAR KICKSTART STM32 CORTEXM3497-8512-ND - KIT STARTER FOR STM32F10XE MCU497-8505-ND - KIT STARTER FOR STM32F10XE MCU497-8304-ND - KIT STM32 MOTOR DRIVER BLDC497-6438-ND - BOARD EVALUTION FOR STM32 512K497-6289-ND - KIT PERFORMANCE STICK FOR STM32MCBSTM32UME-ND - BOARD EVAL MCBSTM32 + ULINK-MEMCBSTM32U-ND - BOARD EVAL MCBSTM32 + ULINK2更多... 其它名称:497-9032STM32F101T8U6-ND |
| S80C31-L16 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:8-Bit Microcontroller |
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