參數(shù)資料
型號(hào): HD404369S
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(yè)數(shù): 81/115頁(yè)
文件大?。?/td> 452K
代理商: HD404369S
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HD404369 Series
81
Port Mode Register C (PMRC: $025):
This register has the following functions (figure 63).
Prescaler division ratio selection
Output level control in idle states
Port mode register C (PMRC: $025) is a 4-bit write-only register. It cannot be written during data transfer.
By setting bit 0 (PMRC0) of this register, the prescaler division ratio is selected. Bit 0 (PMRC0) can be
reset to 0 by MCU reset. By setting bit 1 (PMRC1), the output level of the SO pin is controlled in idle
states. The output level changes at the same time that PMRC1 is written to.
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 57.
Figure 63 Port Mode Register C (PMRC)
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