參數(shù)資料
型號(hào): MC68HC05F4FB
廠商: MOTOROLA INC
元件分類: 微控制器/微處理器
英文描述: 8-BIT, MROM, 1.789 MHz, MICROCONTROLLER, PQFP44
封裝: QFP-44
文件頁數(shù): 48/130頁
文件大小: 2089K
代理商: MC68HC05F4FB
MOTOROLA
2-2
MC68HC05F4
MODES OF OPERATION AND PIN DESCRIPTIONS
2
2.2.2
WAIT mode
The WAIT instruction places the MCU in a low power consumption mode, though it consumes
more power than in STOP mode. All CPU action is suspended, but the core timer and the 16-bit
timer remain active. An interrupt from the core timer, 16-bit timer, IRQ, keyboard, LVI, if enabled,
will cause the MCU to exit the WAIT mode. An external reset, or LVR, causes the MCU to exit the
wait mode.
During WAIT mode, the I-bit in the CCR is cleared to enable interrupts. All other registers, memory
and input/output lines remain in their previous state. The DMG is still active during WAIT mode.
Figure 2-1 STOP and WAIT owcharts
STOP
Stop oscillator
and all clocks;
clear I-mask
RESET
?
Any
interrupt
?
Fetch
interrupt or RESET
vector
Turn on oscillator;
wait tPORL for
stabilization
Yes
No
Yes
WAIT
Oscillator active;
stop processing;
clear I-mask
RESET
?
Any
interrupt
?
Fetch
interrupt or RESET
vector
Restart
processor
clocks
Yes
No
Yes
TPG
20
05F4Book Page 2 Tuesday, August 5, 1997 1:10 pm
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