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ST7LITE49M 数据表(PDF) 64 Page - STMicroelectronics

部件名 ST7LITE49M
功能描述  8-bit MCU with single voltage Flash memory data EEPROM, ADC, 8/12-bit timers, and I²C interface
PDF  188 Pages
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制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

ST7LITE49M 数据表(HTML) 64 Page - STMicroelectronics

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ST7LITE49M
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Figure 29.
Halt timing overview
1.
A reset pulse of at least 42µs must be applied when exiting from Halt mode.
Figure 30.
Halt mode flowchart
1.
WDGHALT is an option bit. See option byte section for more details.
2.
Peripheral clocked with an external clock source can still be active.
3.
Only some specific interrupts can exit the MCU from Halt mode (such as external interrupt). Refer to
Table 17: Interrupt mapping for more details.
4.
Before servicing an interrupt, the CC register is pushed on the stack. The I bit of the CC register is set
during the interrupt routine and cleared when the CC register is popped.
5.
The CPU clock must be switched to 1MHz (RC/8) or AWU RC before entering Halt mode.
HALT
RUN
RUN
256 CPU CYCLE
DELAY
RESET
OR
INTERRUPT
HALT
INSTRUCTION
FETCH
VECTOR
[Active Halt disabled]
HALT INSTRUCTION
RESET
INTERRUPT 3)
Y
N
N
Y
CPU
OSCILLATOR
PERIPHERALS 2)
IBIT
OFF
OFF
0
OFF
FETCH RESET VECTOR
OR SERVICE INTERRUPT
CPU
OSCILLATOR
PERIPHERALS
IBIT
ON
OFF
X 4)
ON
CPU
OSCILLATOR
PERIPHERALS
IBITS
ON
ON
X 4)
ON
256 CPU CLOCK CYCLE
DELAY 5)
WATCHDOG
ENABLE
DISABLE
WDGHALT 1)
0
WATCHDOG
RESET
1
(Active Halt disabled)



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