參數(shù)資料
型號(hào)： HD404629R
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)： 58/155頁
文件大?。?/td> 549K
代理商： HD404629R
HD404629R Series
58
Prescalers
The MCU has the following two prescalers, S and W.
The prescalers operating conditions are listed in table 25, and the prescalers output supply is shown in
figure 42. The timers A–D input clocks except external events, the serial transmit clock except the external
clock, and the LCD circuit operating clock are selected from the prescaler outputs, depending on
corresponding mode registers.
Prescaler Operation
Prescaler S:
11-bit counter that inputs the system clock signal. After being reset to $000 by MCU reset,
prescaler S divides the system clock. Prescaler S keeps counting, except in watch and subactive modes and
at MCU reset.
Prescaler W:
Five-bit counter that inputs the X1 input clock signal (32-kHz crystal oscillation) divided by
eight. After being reset to $00 by MCU reset, prescaler W divides the input clock. Prescaler W can be
reset by software.
Table 25 Prescaler Operating Conditions
Prescaler
Input Clock
Reset Conditions
Stop Conditions
Prescaler S
System clock (in active and standby mode),
Subsystem clock (in subactive mode)
MCU reset
MCU reset,
stop mode,
watch mode
Prescaler W
32-kHz crystal oscillation
MCU reset,
software
MCU reset,
stop mode
Subsystem
clock
Prescaler W
LCD
Timer A
Timer B
Timer C
Timer D
Serial
System
clock
Prescaler S
Clock
selector
Figure 42 Prescaler Output Supply
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
HD404629RFS 制造商:未知廠家 制造商全稱:未知廠家 功能描述:4-Bit Microcontroller
HD404629RH 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:AS Microcomputer Incorporating a DTMF Generator Circuit
HD404629RSERIES 制造商:未知廠家 制造商全稱:未知廠家 功能描述:
HD404629RTF 制造商:未知廠家 制造商全稱:未知廠家 功能描述:4-Bit Microcontroller
HD404629TF 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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