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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： | 17/21页 |
| 文件大小： | 2233K |
| 代理商： | S80C31BH |
87C51/80C51BH/80C31BH
In normal operation ALE is emitted at a constant
rate of 1/6 the oscillator frequency, and may be
used for external timing or clocking purposes. Note,
however, that one ALE pulse is skipped during each
access to external Data Memory.
PSEN
: Program Store Enable is the Read strobe to
External Program Memory. When the 87C51/BH is
executing from Internal Program Memory, PSEN is
inactive (high). When the device is executing code
from External Program Memory, PSEN is activated
twice each machine cycle, except that two PSEN
activations are skipped during each access to Exter-
nal Data Memory.
EA/V PP: External Access enable. EA must be
strapped to VSS in order to enable the 87C51/BH to
fetch code from External Program Memory locations
starting at 0000H up to FFFFH. Note, however, that
if either of the Lock Bits is programmed, the logic
level at EA is internally latched during reset.
EA must be strapped to VCC for internal program
execution.
This pin also receives the programming supply volt-
age (VPP) during EPROM programming.
XTAL1
: Input to the inverting oscillator amplifier.
XTAL2
: Output from the inverting oscillator amplifi-
er.
272335±5
Figure 3. Using the On-Chip Oscillator
OSCILLATOR CHARACTERISTICS
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 3.
To drive the device from an external clock source,
XTAL1 should be driven, while XTAL2 is left uncon-
nected, as shown in Figure 4. There are no require-
ments on the duty cycle of the external clock signal,
since the input to the internal clocking circuitry is
through a divide-by-two flip-flop, but minimum and
maximum high and low times specified on the data
sheet must be observed.
An external oscillator may encounter as much as a
100 pF load at XTAL1 when it starts up. This is due
to interaction between the amplifier and its feedback
capacitance. Once the external signal meets the VIL
and VIH specifications the capacitance will not ex-
ceed 20 pF.
272335±6
Figure 4. External Clock Drive
5
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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