參數(shù)資料
型號(hào)： HCD40C4344R
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系列微電腦（4位單片微計(jì)算機(jī)）
文件頁(yè)數(shù)： 49/100頁(yè)
文件大?。?/td> 610K
代理商： HCD40C4344R
HD404344R Series/HD404394 Series
49
Prescaler
The MCU has one built-in prescaler, S (PSS). This divides the system clock and outputs the divided clock
to the peripheral function modules as shown in figure 25.
Clocks for timers B and C except for external events, and clocks for serial interface except for the external
clock are all selected from the prescaler output by programming each mode register.
Prescaler S is an 11-bit counter which inputs the system clock. After an MCU reset clears the prescaler to
$000, it begins dividing the system clock. Prescaler S stops operating due to either an MCU reset or stop
mode. It cannot be stopped by any other mode.
Timer B
Timer C
Serial
System
clock
Prescaler S
Figure 25 Prescaler Output Supply
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