參數(shù)資料
型號: HD407A4669
廠商: Hitachi,Ltd.
英文描述: Low-Voltage AS Microcomputers with On-Chip DTMF Generation Circuit(帶雙音多頻電路的低電壓微計算機)
中文描述: 低電壓如同在微機芯片的DTMF產(chǎn)生電路(帶雙音多頻電路的低電壓微計算機)
文件頁數(shù): 39/142頁
文件大?。?/td> 894K
代理商: HD407A4669
HD404669 Series
39
STOP/SBY
instruction
IF = 1 and
IM = 0
Hardware NOP
execution
PC (PC)+1
PC (PC)+1
MCU operation
cycle
Standby/watch
mode
IF = 1 and
IM = 0
Hardware NOP
execution
Instruction
execution
Stop mode
No
Yes
IE = 0
Yes
No
Yes
Note:
*
Refer to figure 15, Flowchart for Exiting Low Power Modes,
for IF and IM operation.
STOPC
= 0
RAME = 1
Reset MCU
No
No
Yes
*
Interrupt
service routine
Figure 20 MCU Operating (Low-Power Mode Operation)
Notes:
When the MCU is in watch mode or subactive mode, if the high level period before the falling
edge of
I NT
0
is shorter than the interrupt frame,
I NT
0
is not detected. Also, if the low level period
after the falling edge of
I NT
0
is shorter than the interrupt frame,
I NT
0
is not detected.
Edge detection is shown in figure 21. The level of the
INT
0
signal is sampled by a sampling
clock. When this sampled value changes to low from high, a falling edge is detected.
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