參數(shù)資料
型號: HD40A4356S
廠商: Hitachi,Ltd.
英文描述: 66 POS MOLDED PGA SOCKET
中文描述: 4位HMCS400系列微機
文件頁數(shù): 69/100頁
文件大小: 398K
代理商: HD40A4356S
HD404358 Series
69
Bit
Initial value
Read/Write
Bit name
3
0
W
PMRC3
2
0
W
PMRC2
0
0
W
PMRC0
1
Undefined
W
PMRC1
Port mode register C (PMRC: $025)
PMRC1
0
1
Output Level Control in Idle States
Low level
High level
PMRC0
0
1
Serial Clock Division Ratio
Prescaler output divided by 2
Prescaler output divided by 4
Alarm output function.
Refer to figure 50.
Figure 56 Port Mode Register C (PMRC)
Serial Data Register (SRL: $006, SRU: $007):
This register has the following functions (figures 57 and
58).
Transmission data write and shift
Receive data shift and read
Writing data in this register is output from the SO pin, LSB first, synchronously with the falling edge of the
transmit clock; data is input, LSB first, through the SI pin at the rising edge of the transmit clock.
Input/output timing is shown in figure 59.
Data cannot be read or written during serial data transfer. If a read/write occurs during transfer, the
accuracy of the resultant data cannot be guaranteed.
Bit
Initial value
Read/Write
Bit name
3
Undefined
R/W
SR3
2
Undefined
R/W
SR2
0
Undefined
R/W
SR0
1
Undefined
R/W
SR1
Serial data register (lower digit) (SRL: $006)
Figure 57 Serial Data Register (SRL)
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