- 您现在的位置：买卖IC网 > PDF目录385870 > ST63E69D1 (意法半导体) 8-BIT HCMOS MCU FOR DIGITAL CONTROLLED MULTI FREQUENCYMONITOR PDF资料下载
参数资料
| 型号： | ST63E69D1 |
| 厂商： | 意法半导体 |
| 英文描述： | 8-BIT HCMOS MCU FOR DIGITAL CONTROLLED MULTI FREQUENCYMONITOR |
| 中文描述： | 8位HCMOS单片机的数控多FREQUENCYMONITOR |
| 文件页数： | 33/71页 |
| 文件大小： | 584K |
| 代理商： | ST63E69D1 |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页当前第33页第34页第35页第36页第37页第38页第39页第40页第41页第42页第43页第44页第45页第46页第47页第48页第49页第50页第51页第52页第53页第54页第55页第56页第57页第58页第59页第60页第61页第62页第63页第64页第65页第66页第67页第68页第69页第70页第71页
Figure35. Hardware Activated Watchdog Block Diagram
Figure 36. HardwareActivated Watchdog
Working Principle
HARDWARE ACTIVATED DIGITAL WATCHDOG
FUNCTION
The hardware activated digital watchdog function
consistsof a downcounterthatis automaticallyini-
tialized after reset so that this function does not
need to be activated by the user program. As the
watchdog function is always activated this down
counter can not be used as a timer. The watchdog
is using one data space register (HWDR location
D8H). The watchdogregisteris setto FEHonreset
and immediately startsto countdown, requiringno
software start. Similarly the hardware activated
watchdog can not be stopped or delayed by soft-
ware.
The watchdog timecan be programmed using the
6 MSbits in the watchdog register, this gives the
possibility to generate a reset in a time between
3072 to 196608 oscillator cycles in 64 possible
steps.(With a clock frequency of 8MHz this means
from 384
μ
s to 24.576ms).The reset is prevented if
the register isreloaded with the desired value be-
fore bits 2-7 decrement from all zeros to all ones.
The presence of the hardware watchdog deacti-
vates theSTOP instruction and aWAIT instruction
is automaticallyexecuted instead of a STOP. Bit 1
of the watchdog register (set to one at reset) can
be used to generate a software reset if cleared to
zero). Figure 35 shows the watchdog block dia-
gram whileFigure 36 shows its workingprinciple.
ST6369
29/67
相关PDF资料 |
PDF描述 |
|---|---|
| ST700C12L0 | PHASE CONTROL THYRISTORS Hockey Puk Version |
| ST700C12L0L | PHASE CONTROL THYRISTORS Hockey Puk Version |
| ST700C12L1 | PHASE CONTROL THYRISTORS Hockey Puk Version |
| ST700C | PHASE CONTROL THYRISTORS Hockey Puk Version |
| ST700C12L2L | PHASE CONTROL THYRISTORS Hockey Puk Version |
相关代理商/技术参数 |
参数描述 |
|---|---|
| ST63E73J5D1 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:8-BIT ROM/OTP/EPROM MCUs FOR DIGITALLY CONTROLLED MULTISYNC/MULTISTANDARD MONITORS |
| ST63E85D1 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:8-BIT MCUs WITH ON-SCREEN-DISPLAY FOR TV TUNING |
| ST63E85D1/XX | 制造商:未知厂家 制造商全称:未知厂家 功能描述:8-Bit Microcontroller |
| ST63E87D1 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:8-BIT MCUs WITH ON-SCREEN-DISPLAY FOR TV TUNING |
| ST63E87D1/XX | 制造商:未知厂家 制造商全称:未知厂家 功能描述:8-Bit Microcontroller |
发布紧急采购，3分钟左右您将得到回复。