參數(shù)資料
型號: HD404654S
廠商: Hitachi,Ltd.
英文描述: 4-Bit Single-Chip Microcomputer
中文描述: 4位單片機
文件頁數(shù): 65/109頁
文件大小: 430K
代理商: HD404654S
HD404654 Series
65
Selector
Prescaler S (PSS)
÷
2
÷
8
÷
3
÷
1
÷
5
÷
2
S
I/O control
logic
Idle control
logic
Octal counter
(OC)
Serial interrupt
request flag
(IFS1)
Clock
Serial data
register
(SR1L/U)
Serial mode register
1A (SM1A)
Serial mode register
1B (SM1B)
Transfer
control
SO
1
SCK
1
SI
1
System
clock
I
3
PER
1/2
1/2
Figure 52 Block Diagram of Serial Interface 1
Serial Interface Operation
Selecting and Changing the Operating Mode:
Table 24 lists the serial interfaces’ operating modes. To
select an operating mode, use one of these combinations of port mode register A (PMRA: $004), and serial
mode register 1A (SM1A: $005) settings; to change the operating mode of serial interface 1, always
initialize the serial interface internally by writing data to serial mode register 1A. Note that serial interface
1 is initialized by writing data to serial mode register 1A. Refer to the following section Registers for
Serial Interface for details.
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