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參數(shù)資料
| 型號： | μPD784031Y |
| 廠商： | NEC Corp. |
| 英文描述： | 8/16 Bit Single Chip Microcontrollers(8/16 位微控制器) |
| 中文描述： | 8 / 16位單片機(jī)微控制器（8 / 16位微控制器） |
| 文件頁數(shù)： | 50/66頁 |
| 文件大?。?/td> | 392K |
| 代理商： | ΜPD784031Y |
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50
μ
PD784031Y
10. STANDBY FUNCTION
This function is to reduce the power dissipation of the chip, and can be used in the following modes:
HALT mode: Stops supply of the operating clock to the CPU. This mode is used in combination with the normal
operation mode for intermittent operation to reduce the average power dissipation.
IDLE mode: Stops the entire system with the oscillation circuit continuing operation. The power dissipation
in this mode is close to that in the STOP mode. However, the time required to restore the normal program
operation from this mode is almost the same as that from the HALT mode.
STOP mode: Stops the oscillator and thereby to stop all the internal operations of the chip. Consequently,
the power dissipation is minimized with only leakage current flowing.
These modes are programmable.
The macro service can be started from the HALT mode.
Figure 10-1. Transition of Standby Status
Waits for
oscillation
stabilization
Program
operation
Macro
service
HALT
(standby)
IDLE
(standby)
STOP
(standby)
Oscillation stabilization
time expires
Macro service request
End of one processing
End of macro service
Mcosrierqet
Edo n rcsig
Nt
StItrutrqet
Interrupt request of
masked interrupt
St DEmd
NM,INP,INP nu
Nt
SesSTOPmode
RESETinpu
NM,INP,INP nu
Nt
Notes 1.
When INTP4 and INTP5 are not masked
2.
Only interrupt requests that are not masked
Remark
Only the externally input NMI is valid. The watchdog timer cannot be used to release the standby mode
(STOP/IDLE mode).
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