参数资料
型号: ST72141K2B3/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, PLASTIC, SDIP-32
文件页数: 56/133页
文件大小: 2615K
代理商: ST72141K2B3/XXX
Obsolete
Product(s)
- Obsolete
Product(s)
ST72141K2
29/133
POWER SAVING MODES (Cont’d)
5.2 HALT Mode
The HALT mode is the lowest power consumption
mode of the MCU. It is entered by executing the
ST7 HALT instruction (see Figure 21).
The MCU can exit HALT mode on reception of ei-
ther an external interrupt or a reset (see Table 3).
When exiting HALT mode by means of a RESET
or an interrupt, the oscillator is immediately turned
on and the 4096 CPU cycle delay is used to stabi-
lize the oscillator. After the start up delay, the CPU
resumes operation by servicing the interrupt or by
fetching the reset vector which woke it up (see Fig-
When entering HALT mode, the I bit in the CC
Register is forced to 0 to enable interrupts.
In the HALT mode the main oscillator is turned off
causing all internal processing to be stopped, in-
cluding the operation of the on-chip peripherals.
All peripherals are not clocked except the ones
which get their clock supply from another clock
generator (such as an external or auxiliary oscilla-
tor).
Figure 20. HALT Mode timing overview
Figure 21. HALT modes flow-chart
HALT
RUN
4096 CPU CYCLE
DELAY
RESET
OR
INTERRUPT
HALT
INSTRUCTION
FETCH
VECTOR
HALT INSTRUCTION
Notes:
CPU
OSCILLATOR
PERIPHERALS
I BIT
OFF
0
OFF
RESET
EXTERNAL*
Y
N
Y
CPU
OSCILLATOR
PERIPHERALS
ON
OFF
INTERRUPT
HALT
FETCH RESET VECTOR
OR SERVICE INTERRUPT**
4096 clock cycles delay
CPU
OSCILLATOR
PERIPHERALS
ON
External interrupt or internal interrupts with Exit from Halt Mode capability
*
** Before servicing an interrupt, the CC register is pushed on the stack.
WATCHDOG
Y
N
ENABLE
相关PDF资料
PDF描述
ST72311N4T6/XXX 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PQFP64
ST72311J2B6/XXX 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PDIP42
ST72311N2T3/XXX 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PQFP64
ST72321BAR7T6 MICROCONTROLLER, QFP64
ST72321BR7T3 MICROCONTROLLER, QFP64
相关代理商/技术参数
参数描述
ST72141K2B6 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:8-BIT MCU WITH ELECTRIC-MOTOR CONTROL, ADC, 16-BIT TIMERS, SPI INTERFACE
ST72141K2M1 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:8-BIT MCU WITH ELECTRIC-MOTOR CONTROL, ADC, 16-BIT TIMERS, SPI INTERFACE
ST72141K2M3 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:8-BIT MCU WITH ELECTRIC-MOTOR CONTROL, ADC, 16-BIT TIMERS, SPI INTERFACE
ST72141K2M3/XXX 制造商:未知厂家 制造商全称:未知厂家 功能描述:Microcontroller
ST72141K2M6 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:8-BIT MCU WITH ELECTRIC-MOTOR CONTROL, ADC, 16-BIT TIMERS, SPI INTERFACE