UPD784938 datasheet(44/733 Pages) NEC

Part #	UPD784938

Description	16-Bit Single-Chip Microcontrollers

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Manufacturer	NEC [NEC]

Direct Link	http://www.nec.com/

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CHAPTER 1

GENERAL

44

Preliminary User’s Manual U13987EJ1V0UM00

A8 to A19:

Address Bus

AD0 to AD7:

Address/Data Bus

ANI0 to ANI7:

Analog Input

ASCK, ASCK2:

Asynchronous Serial Clock

ASTB:

Address Strobe

AVDD:

Analog Power Supply

AVREF1:

Analog Reference Voltage

AVSS:

Analog Ground

CI:

Clock Input

CLKOUT:

Clock Output

HLDAK:

Hold Acknowledge

HLDRQ:

Hold Request

INTP0 to INTP5: Interrupt from Peripherals

NMI:

Non-maskable Interrupt

P00 to P07:

Port0

P10 to P17:

Port1

P20 to P27:

Port2

P30 to P37:

Port3

P40 to P47:

Port4

P50 to P57:

Port5

P60 to P67:

Port6

P70 to P77:

Port7

P90 to P97:

Port9

P100 to P107:

Port10

PWM0, PWM1:

Pulse Width Modulation 0, 1

RD:

Read Strobe

REFRQ:

Refresh Request

REGC:

Regulator Capacitance

REGOFF:

Regulator Off

RESET:

Reset

RX:

IEBus Receive Data

RxD, RxD2:

Receive Data

SCK0 to SCK3:

Serial Clock

SI0 to SI3:

Serial Input

SO0 to SO3:

Serial Output

TEST:

Test

TO0 to TO3:

Timer Output

TxD, TxD2:

Transmit Data

TX:

IEBus Transmit Data

VDD:

Power Supply

VPPNote:

Programming Power Supply

VSS:

Ground

WAIT:

Wait

WR:

Write Strobe

X1, X2:

Crystal (Main System Clock)

XT1, XT2:

Crystal (Watch)

Note

The VPP pin is used only in the

µPD78F4938.

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