參數(shù)資料
型號(hào): HD404652S
廠商: Hitachi,Ltd.
英文描述: 4-Bit Single-Chip Microcomputer
中文描述: 4位單片機(jī)
文件頁數(shù): 46/109頁
文件大小: 430K
代理商: HD404652S
HD404654 Series
46
Prescalers
The MCU has the following prescaler S.
The prescaler operating conditions are listed in table 21, and the prescaler output supply is shown in figure
32. The timer A–D 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 a system clock signal. After being reset to $000 by MCU reset,
prescaler S divides the system clock. Prescaler S keeps counting, except at MCU reset.
Table 21 Prescaler Operating Conditions
Prescaler
Input Clock
Reset Condition
Stop Conditions
Prescaler S
System clock
MCU reset
MCU reset, stop mode
System
clock
Prescaler S
Timer A
Timer C
Timer D
Serial 1
Figure 32 Prescaler Output Supply
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