- 您现在的位置：买卖IC网 > PDF目录98144 > ST62P45BQ6/XXX (STMICROELECTRONICS) 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PQFP52 PDF资料下载
参数资料
| 型号： | ST62P45BQ6/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, PQFP52 |
| 封装： | PLASTIC, QFP-52 |
| 文件页数： | 25/72页 |
| 文件大小： | 514K |
| 代理商： | ST62P45BQ6/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页当前第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
31/72
ST62T45B/E45B
3.5 POWER SAVING MODES
The WAIT and STOP modes have been imple-
mented in the ST62xx family of MCUs in order to
reduce the product’s electrical consumption dur-
ing idle periods. These two power saving modes
are described in the following paragraphs.
3.5.1 WAIT Mode
The MCU goes into WAIT mode as soon as the
WAIT instruction is executed. The microcontroller
can be considered as being in a “software frozen”
state where the core stops processing the pro-
gram instructions, the RAM contents and periph-
eral registers are preserved as long as the power
supply voltage is higher than the RAM retention
voltage. In this mode the peripherals are still ac-
tive.
WAIT mode can be used when the user wants to
reduce the MCU power consumption during idle
periods, while not losing track of time or the capa-
bility of monitoring external events. The active os-
cillator is not stopped in order to provide a clock
signal to the peripherals. Timer counting may be
enabled as well as the Timer interrupt, before en-
tering the WAIT mode: this allows the WAIT mode
to be exited when a Timer interrupt occurs. The
same applies to other peripherals which use the
clock signal.
If the WAIT mode is exited due to a Reset (either
by activating the external pin or generated by the
Watchdog), the MCU enters a normal reset proce-
dure. If an interrupt is generated during WAIT
mode, the MCU’s behaviour depends on the state
of the processor core prior to the WAIT instruction,
but also on the kind of interrupt request which is
generated. This is described in the following para-
graphs. The processor core does not generate a
delay following the occurrence of the interrupt, be-
cause the oscillator clock is still available and no
stabilisation period is necessary.
3.5.2 STOP Mode
If the Watchdog is disabled, STOP mode is avail-
able. When in STOP mode, the MCU is placed in
the lowest power consumption mode. In this oper-
ating mode, the microcontroller can be considered
as being “frozen”, no instruction is executed, the
oscillator is stopped, the RAM contents and pe-
ripheral registers are preserved as long as the
power supply voltage is higher than the RAM re-
tention voltage, and the ST62xx core waits for the
occurrence of an external interrupt request or a
Reset to exit the STOP state.
If the STOP state is exited due to a Reset (by ac-
tivating the external pin) the MCU will enter a nor-
mal reset procedure. Behaviour in response to in-
terrupts depends on the state of the processor
core prior to issuing the STOP instruction, and
also on the kind of interrupt request that is gener-
ated.
This case will be described in the following para-
graphs. The processor core generates a delay af-
ter occurrence of the interrupt request, in order to
wait for complete stabilisation of the oscillator, be-
fore executing the first instruction.
30
相关PDF资料 |
PDF描述 |
|---|---|
| ST62T03CM6E | 8-BIT, OTPROM, 8 MHz, MICROCONTROLLER, PDSO16 |
| ST62T10BM6 | 8-BIT, OTPROM, 8 MHz, MICROCONTROLLER, PDSO20 |
| ST62T25BB6 | 8-BIT, OTPROM, 8 MHz, MICROCONTROLLER, PDIP28 |
| ST62T20BB6 | 8-BIT, OTPROM, 8 MHz, MICROCONTROLLER, PDIP20 |
| ST62T18CB6 | 8-BIT, OTPROM, 8 MHz, MICROCONTROLLER, PDIP20 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| ST62P52C | 制造商:STMicroelectronics 功能描述: |
| ST62P62CM6/MOMTR | 制造商:STMicroelectronics 功能描述: |
| ST62P62CM6/MPITR | 制造商:STMicroelectronics 功能描述: |
| ST62P62CM6/MSATR | 制造商:STMicroelectronics 功能描述: |
| ST62P62CN6/MMMTR | 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。