UPD78044F datasheet(38/472 Pages) NEC

38 / 472 page

Chapter 2

Pin Function (µPD780828A Subseries)

User’s Manual U16504EE1V1UD00

VLCD

LCD drive voltage

SGO

Output

Sound generator output

Input

P60/SGOF

SGOA

Output

Sound generator amplitude output

Input

P61/PCL

SGOF

Output

Sound generator frequency output

Input

P60/SGO

ANI0 to ANI4 Input

AD converter analog input

Input

P10-P14

AVDD /AVREF -

AD converter reference voltage input. Power supply

of the AD converter.

AVSS

AD converter ground potential. Connect to VSS

SM11-SM14

Output

Meter control output

Hi-z

P20-P23

SM21-SM24

P24-P27

SM31-SM34

P50-P53

SM41-SM44

P54-P57

SMVDD

Meter C/D power supply

SMVSS

Meter C/D ground

RESET

Input

System reset input

Crystal connection for main system clock

VDD0,VDD1

Positive power supply

VSS0,VSS1

Ground potential

VPP

High voltage supply for flash programming

(only flash version)

-IC

Internal connection. Connect directly to VSS

(only Mask ROM version)

VPP

Table 2-2:

Non-Port Pins (2/2)

Pin Name

Input/Output

Function

After

Reset

Alternate

Function Pin

UPD78044F Datasheet(PDF) 38 Page - NEC

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