參數(shù)資料
型號(hào)： HD4074629
廠商： Hitachi,Ltd.
英文描述： AS Microcomputer Incorporating a DTMF Generator Circuit(微計(jì)算機(jī)帶雙音多頻發(fā)生器電路)
中文描述： 由于微機(jī)安裝有雙音多頻發(fā)電機(jī)斷路器（微計(jì)算機(jī)帶雙音多頻發(fā)生器電路）
文件頁數(shù)： 34/155頁
文件大?。?/td> 549K
代理商： HD4074629
HD404629R Series
34
Standby Mode:
In standby mode, the oscillators continue to operate, but the clocks related to instruction
execution stop. Therefore, the CPU operation stops, but all RAM and register contents are retained, and the
D or R port status, when set to output, is maintained. Peripheral functions such as interrupts, timers, and
serial interface continue to operate. The power dissipation in this mode is lower than in active mode
because the CPU stops.
The MCU enters standby mode when the SBY instruction is executed in active mode.
Standby mode is terminated by a RESET input or an interrupt request. If it is terminated by RESET input,
the MCU is reset as well. After an interrupt request, the MCU enters active mode and executes the next
instruction after the SBY instruction. If the interrupt enable flag is 1, the interrupt is then processed; if it is
0, the interrupt request is left pending and normal instruction execution continues. A flowchart of
operation in standby mode is shown in figure 15.
Standby mode
No
Yes
No
Yes
No
Yes
*
1
No
Yes
No
Yes
*
1
No
Yes
*
1
Yes
*
1
Watch mode
System clock
oscillator started
System clock
oscillator started
System reset
Interrupts
enabled
No
Yes
IF = 1,
IM = 0,
IE = 1
RESET = 1
IF0
IM0
= 1
IF1
IM1
= 1
IMTA
= 1
IF + IF2
IMTB
IM2
= 1
IF + IF3
IMTC
IM3
= 1
IF + IF4
IMTD
IM4
= 1
No
Yes
*
1
IF + IFS
IMAD
IMS
= 1
No
Stop mode
RESET = 1
STOPC
= 0
RAME = 1
RAME = 0
Yes
Yes
No
No
Next instruction
execution
Next instruction
execution
Note: 1. Only when clearing from standby mode
Figure 15 MCU Operation Flowchart
相關(guān)PDF資料
PDF描述
HD404629R AS Microcomputer Incorporating a DTMF Generator Circuit(微計(jì)算機(jī)帶雙音多頻發(fā)生器電路)
HD404638R 4-Bit Single-Chip Microcomputer(4位單片微計(jì)算機(jī))
HD40A4638R 4-Bit Single-Chip Microcomputer(4位單片微計(jì)算機(jī))
HD40A4639R 4-Bit Single-Chip Microcomputer(4位單片微計(jì)算機(jī))
HD404639R 4-Bit Single-Chip Microcomputer(4位單片微計(jì)算機(jī))
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
HD4074629F 制造商:Renesas Electronics Corporation 功能描述:
HD4074629FS 制造商:未知廠家 制造商全稱:未知廠家 功能描述:4-Bit Microcontroller
HD4074629H 制造商:未知廠家 制造商全稱:未知廠家 功能描述:4-Bit Microcontroller
HD4074629TF 制造商:未知廠家 制造商全稱:未知廠家 功能描述:4-Bit Microcontroller
HD4074654 制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:4-Bit Single-Chip Microcomputer
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