參數(shù)資料
型號: HD404318S
廠商: Hitachi,Ltd.
英文描述: 4-bit HMCS400-series microcomputer
中文描述: 4位HMCS400系列微機
文件頁數(shù): 41/66頁
文件大?。?/td> 305K
代理商: HD404318S
HD404318 Series
41
Alarm Output Function
The MCU has an alarm output function built in. By setting port mode register C (PMRC: $025), one of
four alarm frequencies supplied from the PSS can be selected.
Table 9
Port Mode Register C
PMRC
Bit 3
Bit 2
System Clock Divisor
0
0
÷
2048
÷
1024
÷
512
÷
256
1
1
0
1
I
÷
÷
÷
÷
2
5
1
2
Selector
System
clock
PER
Prescaler S (PSS)
2
Alarm output
control signal
BUZZ
Alarm output
controller
Port mode
register C
(PMRC)
Port mode
register A
(PMRA)
Figure 32 Alarm Output Function Block Diagram
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