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参数资料
| 型号： | MC68HC05C5CP |
| 厂商： | MOTOROLA INC |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PDIP40 |
| 封装： | DIP-40 |
| 文件页数： | 29/58页 |
| 文件大小： | 166K |
| 代理商： | MC68HC05C5CP |
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Page 29
Section 4: CPU Core
MOTOROLA
MC68HC05C5 Specification Rev. 1.2
4.6.2
WAIT
The WAIT instruction places the MCU in a low-power consumption mode, but the WAIT
mode consumes more power than the STOP mode. All CPU action is suspended, but the
timer and the oscillator remain active. Any interrupt or reset (including a COP reset) will
cause the MCU to exit the WAIT mode.
During the 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 timer may be
enabled to allow a periodic exit from the WAIT mode.
Figure 4-6: STOP/WAIT Flowcharts
Y
STOP
Oscillator Active
Timer Clock Active
Processor Clocks Stopped
Clear I Bit
Interrupt
(IRQ)
External
Reset
Turn On Oscillator
Wait for Time
Delay to Stabilize
1. Fetch Reset
Vector or
2. Service
Interrupt
a.Stack
b.Set I Bit
c.Vector to
Interrupt
Routine
Restart
Processor Clock
WAIT
Stop Oscillator
And All Clocks
Clear I Bit
Interrupt
Timer
Interrupt
(IRQ)
External
1. Fetch Reset
Vector or
2. Service
Interrupt
a.Stack
b.Set I Bit
c.Vector to
Interrupt
Routine
Y
N
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