参数资料
型号: MC68HC05V7FNR2
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, PQCC68
封装: PLASTIC, LCC-68
文件页数: 142/170页
文件大小: 589K
代理商: MC68HC05V7FNR2
SECTION 8: LOW-POWER MODES
MOTOROLA
Page 59
MC68HC05V7 Specification Rev. 1.0
Figure 8-2:
STOP/WAIT Flowcharts
8.1.2
WAIT INSTRUCTION
The WAIT instruction places the MCU in a low-power mode, which consumes more power
than the STOP Mode. In the WAIT Mode the internal processor clock is halted, suspending
all processor and internal bus activity. Internal timer clocks remain active, permitting
interrupts to be generated from the timer or a reset to be generated from the COP
Watchdog Timer. Execution of the WAIT instruction automatically clears the I-bit in the
Condition Code Register. All other registers, memory, and input/output lines remain in their
previous states.
MDLC
Bus
Edge?
Y
N
1.
Fetch Reset Vector
or
2.
Service Interrupt
a.
Stack
b.
Set I-Bit
c.
Vector to Interrupt Routine
WAIT
STOP Mask
Option En-
abled?
Y
N
External
RESET?
Y
N
IRQ
External
Interrupt?
Y
N
Stop External Oscillator,
Stop Internal Timer Clock,
and Reset Startup Delay
Restart External Oscillator,
and Stabilization Delay
Stop Internal Processor Clock,
Clear I-Bit in CCR,
End
of Startup
Delay
Y
N
IRQ
External
Interrupt?
Y
N
External Oscillator Active,
and Internal
Timer Clock Active
Restart
Internal Processor Clock
Stop Internal Processor Clock,
Clear I-Bit in CCR,
TIMER
Internal
Interrupt?
Y
N
External
RESET?
Y
N
STOP
MDLC
Bus
Edge?
Y
N
Port A
or C Falling
Edge?
Y
N
Port A
or C Falling
Edge?
Y
N
Reset Chip
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