參數(shù)資料
型號： HD407A4374
廠商： Hitachi,Ltd.
英文描述： Low-Voltage AS Microcomputers with On-Chip A/D Converter(帶片上A/D轉(zhuǎn)換器的低壓微計算機)
中文描述： 低電壓如同在微機芯片的A / D轉(zhuǎn)換器（帶片上的A / D轉(zhuǎn)換器的低壓微計算機）
文件頁數(shù)： 49/162頁
文件大?。?/td> 482K
代理商： HD407A4374
HD404374/HD404384/HD404389/HD404082/HD404084 Series
49
Stop mode:
In stop mode, all MCU function stop except that states prior to entry into stop mode are retained. This
mode thus has the lowest power consumption of all operating mode.
In stop mode, the OSC
1
and OSC
2
oscillators stop. Bit 3 (SSR3) of the system clock select register (SSR:
$004) (figure 22) can be used to select the active (= 0) or stopped (= 1) state for the X1 and X2 oscillators.
The MCU is switched to stop mode by executing a STOP instruction while bit 3 (TMA3) of timer mode
register A (TMA: $00F) (figure 33) is cleared to 0 in active mode. Stop mode is cleared by
RESET
or
WU
0
input. When stop mode is cleared by
RESET
, the RESET signal should be input for at least the oscillation
settling time (tRC) (see "AC Characteristics") shown in figure 13. Then, the MCU is initialized and starts
instruction execution from the start (address 0) of the program (IE = 0, IMWU = 0). If IE is set before
entering stop mode (IE = 1, IMWU = 0), wakeup interrupt handling is executed after the transition to active
mode.
When the MCU detects a falling edge at
WU
0
in stop mode, it automatically waits for the oscillation
settling time, then switches to active mode. After the transition to active mode, the MCU resumes program
execution from the instruction following the STOP instruction.
If stop mode is cleared by wakeup input, RAM data and registers retain their values prior to entering stop
mode.
Stop mode
Oscillator
Internal clock
RESET
STOP instruction executed
t
res
(At least oscillation settling time (t
RC
))
Figure 13 Timing Chart for Clearing Stop Mode by RESET Input
Note:
If stop mode is cleared by wakeup input when an external clock is used as the system clock
(OSC1), the subclock should not be stopped in stop mode.
Watch mode ( Applies to HD404374 Series) :
In watch mode, the realtime clock function (timer A) and LCD function using the X1 and X2 oscillators
operate, but other functions stop. This mode thus has the second lowest power consumption after stop
mode, and is useful for performing realtime clock display only.
In watch mode, the OSC
1
and OSC
2
oscillators stop but the X1 and X2 oscillators continue to operate.
相關(guān)PDF資料
PDF描述
HD407A4384 Low-Voltage AS Microcomputers with On-Chip A/D Converter(帶片上A/D轉(zhuǎn)換器的低壓微計算機)
HD407A4389 Low-Voltage AS Microcomputers with On-Chip A/D Converter(帶片上A/D轉(zhuǎn)換器的低壓微計算機)
HD407C4374 Low-Voltage AS Microcomputers with On-Chip A/D Converter(帶片上A/D轉(zhuǎn)換器的低壓微計算機)
HD407C4384 Low-Voltage AS Microcomputers with On-Chip A/D Converter(帶片上A/D轉(zhuǎn)換器的低壓微計算機)
HD407C4389 Low-Voltage AS Microcomputers with On-Chip A/D Converter(帶片上A/D轉(zhuǎn)換器的低壓微計算機)
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
HD407A4374FT 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:Low-Voltage AS Microcomputers with On-Chip A/D Converter
HD407A4374FTI 制造商:Renesas Electronics Corporation 功能描述:
HD407A4384FT 制造商:未知廠家 制造商全稱:未知廠家 功能描述:4-Bit Microcontroller
HD407A4384S 制造商:未知廠家 制造商全稱:未知廠家 功能描述:4-Bit Microcontroller
HD407A4389FT 制造商:未知廠家 制造商全稱:未知廠家 功能描述:4-Bit Microcontroller
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