參數(shù)資料
型號(hào): HD40A43612
廠商: Hitachi,Ltd.
英文描述: 4-bit HMCS400-Series microcomputer(4位單片微計(jì)算機(jī))
中文描述: 4位HMCS400系列微機(jī)(4位單片微計(jì)算機(jī))
文件頁數(shù): 53/115頁
文件大?。?/td> 710K
代理商: HD40A43612
HD404369 Series
53
Prescalers
The MCU has the following two prescalers, S and W.
The prescaler operating conditions are listed in table 24, and the prescaler output supply is shown in figure
35. The timer A–C input clocks except external events and the serial transmit clock except the external
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 24
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
Timer A
Timer B
Timer C
Serial
Alarm output
circuit
System
clock
Prescaler S
Clock
selector
f
X
/8
f
X
/4 or f
X
/8
Figure 35 Prescaler Output Supply
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參數(shù)描述
HD40A43612F 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:microcomputer has an A/D converter
HD40A43612H 制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:4-bit HMCS400-Series microcomputer
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