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HD4043312FS Datasheet(PDF) 49 Page - Hitachi Semiconductor

Part # HD4043312FS
Description  4-bit HMCS400-Series microcomputer with large-capacity memory
PDF  78 Pages
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Manufacturer  HITACHI [Hitachi Semiconductor]
Direct Link  http://www.renesas.com/eng
Logo HITACHI - Hitachi Semiconductor

HD4043312FS Datasheet(HTML) 49 Page - Hitachi Semiconductor

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HD404339 Series
49
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.
Selector
System
clock
øPER
Prescaler S (PSS)
2
Alarm output
control signal
BUZZ
Alarm output
controller
Port mode
register C
(PMRC)
Port mode
register A
(PMRA)
Figure 37 Alarm Output Function Block Diagram
Table 9
Port Mode Register C
PMRC
Bit 3
Bit 2
System Clock Divisor
00
÷ 2048
1
÷ 1024
10
÷ 512
1
÷ 256



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