參數(shù)資料
型號: HD4048212R
廠商: Hitachi,Ltd.
英文描述: AS Microcomputer Incorporating a LCD controller/Driver Circuit(帶LCD控制/驅(qū)動電路的微計算機)
中文描述: 由于微機安裝有LCD控制器/驅(qū)動電路(帶液晶控制/驅(qū)動電路的微計算機)
文件頁數(shù): 57/147頁
文件大小: 519K
代理商: HD4048212R
HD404829R Series
57
Prescalers
The MCU has the following two prescalers, S and W.
The prescalers operating conditions are listed in table 19, 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 19 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
相關PDF資料
PDF描述
HD4074829 AS Microcomputer Incorporating a LCD controller/Driver Circuit(帶LCD控制/驅(qū)動電路的微計算機)
HD404828R AS Microcomputer Incorporating a LCD controller/Driver Circuit(帶LCD控制/驅(qū)動電路的微計算機)
HD404829R AS Microcomputer Incorporating a LCD controller/Driver Circuit(帶LCD控制/驅(qū)動電路的微計算機)
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相關代理商/技術參數(shù)
參數(shù)描述
HD4048212RFS 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:AS Microcomputer Incorporating a LCD controller/Driver Circuit
HD4048212RH 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:AS Microcomputer Incorporating a LCD controller/Driver Circuit
HD4048212RTF 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:AS Microcomputer Incorporating a LCD controller/Driver Circuit
HD4048212TF 制造商:未知廠家 制造商全稱:未知廠家 功能描述:4-Bit Microcontroller
HD404828FS 制造商:未知廠家 制造商全稱:未知廠家 功能描述:4-Bit Microcontroller