參數(shù)資料
型號: HD404358S
廠商: Hitachi,Ltd.
英文描述: 4-bit HMCS400-Series microcomputer
中文描述: 4位HMCS400系列微機(jī)
文件頁數(shù): 61/100頁
文件大小: 398K
代理商: HD404358S
HD404358 Series
61
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 51 Serial Interface Block Diagram
Serial Interface Operation
Selecting and Changing the Operating Mode:
Table 27 lists the serial interface’s operating modes. To
select an operating mode, use one of these combinations of port mode register A (PMRA: $004) and the
serial mode register (SMR: $005) settings; to change the operating mode, always initialize the serial
interface internally by writing data to the serial mode register. Note that the serial interface is initialized by
writing data to the serial mode register. Refer to the following Serial Mode Register section for details.
Table 27
Serial Interface Operating Modes
SMR
PMRA
Bit 3
Bit 1
Bit 0
Operating Mode
1
0
0
Continuous clock output mode
1
Transmit mode
1
0
Receive mode
1
Transmit/receive mode
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