HD404669 Datasheet, PDF(8/142 Page) Hitachi Semiconductor – Low-Voltage AS Microcomputers with On-Chip DTMF Generation Circuit

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HD404669 Datasheet, PDF (8/142 Pages) Hitachi Semiconductor – Low-Voltage AS Microcomputers with On-Chip DTMF Generation Circuit

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HD404669 Series

Item

Voltage

comparator

Symbol

COMP0,

COMP1

VCref

Frequency SEL

division

ratio

selection

Pin Number

FP-64A, chip I/O

63, 64

I

Function

Comparator analog input pins.

1

â

Analog input pin threshold voltage reference level power

supply pin.

58

I

Pin that selects the system clock division ratio immediately

after a reset and when returning from stop mode to active

mode. Connect to Vcc voltage to select division-by-4, or to

GND potential to select division-by-32.

8

▷