- 您现在的位置：买卖IC网 > PDF目录98145 > ST7263BK1B/XXX (STMICROELECTRONICS) 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PDIP32 PDF资料下载
参数资料
| 型号： | ST7263BK1B/XXX |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PDIP32 |
| 封装： | 0.400 INCH, LEAD FREE, SHRINK, PLASTIC, DIP-32 |
| 文件页数： | 60/140页 |
| 文件大小： | 1423K |
| 代理商： | ST7263BK1B/XXX |
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页当前第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页第72页第73页第74页第75页第76页第77页第78页第79页第80页第81页第82页第83页第84页第85页第86页第87页第88页第89页第90页第91页第92页第93页第94页第95页第96页第97页第98页第99页第100页第101页第102页第103页第104页第105页第106页第107页第108页第109页第110页第111页第112页第113页第114页第115页第116页第117页第118页第119页第120页第121页第122页第123页第124页第125页第126页第127页第128页第129页第130页第131页第132页第133页第134页第135页第136页第137页第138页第139页第140页
ST7263B
26/140
8 POWER SAVING MODES
8.1 Introduction
To give a large measure of flexibility to the applica-
tion in terms of power consumption, two main pow-
er saving modes are implemented in the ST7.
After a RESET, the normal operating mode is se-
lected by default (RUN mode). This mode drives
the device (CPU and embedded peripherals) by
means of a master clock which is based on the
main oscillator frequency divided by 3 (fCPU).
From Run mode, the different power saving
modes may be selected by setting the relevant
register bits or by calling the specific ST7 software
instruction whose action depends on the oscillator
status.
8.2 HALT Mode
The MCU consumes the least amount of power in
HALT mode. The HALT mode is entered by exe-
cuting the HALT instruction. The internal oscillator
is then turned off, causing all internal processing to
be stopped, including the operation of the on-chip
peripherals.
When entering HALT mode, the I bit in the Condi-
tion Code Register is cleared. Thus, all external in-
terrupts (ITi or USB end suspend mode) are al-
lowed and if an interrupt occurs, the CPU clock be-
comes active.
The MCU can exit HALT mode on reception of ei-
ther an external interrupt on ITi, an end suspend
mode interrupt coming from USB peripheral, or a
reset. The oscillator is then turned on and a stabi-
lization time is provided before releasing CPU op-
eration. The stabilization time is 4096 CPU clock
cycles.
After the start up delay, the CPU continues opera-
tion by servicing the interrupt which wakes it up or
by fetching the reset vector if a reset wakes it up.
Figure 19. HALT Mode Flow Chart
N
EXTERNAL
INTERRUPT*
RESET
HALT INSTRUCTION
4096 CPU CLOCK
FETCH RESET VECTOR
OR SERVICE INTERRUPT
CYCLES DELAY
CPU CLOCK
OSCILLATOR
PERIPH. CLOCK
I-BIT
ON
SET
ON
CPU CLOCK
OSCILLATOR
PERIPH. CLOCK
I-BIT
OFF
CLEARED
OFF
Y
Note: Before servicing an interrupt, the CC register is
pushed on the stack. The I-Bit is set during the inter-
rupt routine and cleared when the CC register is
popped.
相关PDF资料 |
PDF描述 |
|---|---|
| ST72652AR4T1/XXX | 8-BIT, MROM, MICROCONTROLLER, PQFP64 |
| ST72651AR6T1E/XXX | 8-BIT, MROM, MICROCONTROLLER, PQFP64 |
| ST72652C4T1/XXX | 8-BIT, MROM, MICROCONTROLLER, PQFP48 |
| ST7267R8T1L/XXX | 16-BIT, MROM, 30 MHz, RISC MICROCONTROLLER, PQFP64 |
| ST7267C8T1/XXX | 16-BIT, MROM, 30 MHz, RISC MICROCONTROLLER, PQFP48 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| ST7263-EMU2 | 功能描述:仿真器/模拟器 ST7 Emulator Board RoHS:否 制造商:Blackhawk 产品:System Trace Emulators 工具用于评估:C6000, C5000, C2000, OMAP, DAVINCI, SITARA, TMS470, TMS570, ARM 7/9, ARM Cortex A8/R4/M3 用于:XDS560v2 |
| ST7265X-EVAL/MS | 制造商:STMicroelectronics 功能描述:ST6 EVAL BD - Bulk |
| ST7265X-EVAL/PFD | 制造商:STMicroelectronics 功能描述:USB FLASH EVAL - Bulk |
| ST7266 | 制造商:6940 功能描述:ST7266 |
| ST7267C8T1L | 制造商:STMicroelectronics 功能描述: |
发布紧急采购，3分钟左右您将得到回复。