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參數(shù)資料
| 型號： | μPD780308Y |
| 廠商： | NEC Corp. |
| 英文描述： | 8 Bit Single Chip Microcontrollers(8位單片微控制器) |
| 中文描述： | 8位單片機微控制器（8位單片微控制器） |
| 文件頁數(shù)： | 33/72頁 |
| 文件大?。?/td> | 531K |
| 代理商： | ΜPD780308Y |
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μ
PD780306Y, 780308Y
33
7.
STANDBY FUNCTION
The standby function is a function to reduce the current consumption and there are the following two kinds of standby
functions.
HALT mode : Halts CPU operating clock and can reduce average current consumption by the intermittent operation
along with the normal operation.
STOP mode : Halts main system clock oscillation. Halts all operations with the main system clock and sets ultra-
low current consumption state with subsystem clock only.
Figure 7-1. Standby Function
Note
Halting the main system clock enables the current consumption to be reduced.
When the CPU is operated by the subsystem clock, the main system clock should be halted by setting the bit 7 (MCC)
of the processor clock control register (PCC). The STOP instruction is not available.
Caution When the main system clock is stopped and the system is operated by the subsystem clock, the main
system clock should be returned to after securing the oscillation stabilization time by a program.
8.
RESET FUNCTION
There are the following two kinds of resetting methods.
External reset by RESET pin.
Internal reset by watchdog timer hung-up time detection.
CSS=1
CSS=0
Main system clock operation
Interrupt
request
STOP mode
Main system clock
oscillation halted
STOP
instruction
(
)
Interrupt
request
HALT instruction
HALT mode
Clock supply to CPU halted,
oscillation maintained
(
)
Subsystem clock operation
Note
HALT instruction
Interrupt
request
HALT mode
Note
Clock supply to CPU halted,
oscillation maintained
(
)
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