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)）
文件頁數(shù)： 61/100頁
文件大?。?/td> 610K
代理商： HCD40C4344R
HD404344R Series/HD404394 Series
61
Serial Interface
The MCU has a one-channel 8-bit serial interface built in with the following features.
One of 12 different internal clocks or an external clock can be selected as the transmit clock. The
internal clocks include the six prescaler outputs divided by two and by four, and the system clock.
During idle states, the serial output pin can be controlled as high or low output.
Transmit clock errors can be detected.
An interrupt request can be generated when any errors occurred or data transfer has completed.
I
÷
2
÷
8
÷
3
÷
1
÷
5
÷
2
Port mode
register C
(PMRC)
SCK
Selector
System
clock
PER
Prescaler S (PSS)
Idle
controller
3
Serial mode
register
(SMR)
Clock
Serial data
register (SR)
Serial interrupt
request flag
(IFS)
S
1/2
1/2
SI
SO
Octal
counter (OC)
I/O
controller
Transfer
control
signal
Figure 41 Serial Interface Block Diagram
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