UPD720122 datasheet(9/82 Pages) NEC

9 / 82 page

Data Sheet S16685EJ2V0DS

µPD720122

PIN INFORMATION

(1/2)

Pin Name

I/O

Buffer Type

Active

Level

Function

RESETB

5 V tolerant Input Schmitt

Low

Asynchronous reset signaling

XIN_CLK

3.3 V Input

System clock input or oscillator In

XOUT

3.3 V Output

Oscillator out

CSB

5 V tolerant Input

Low

Chip select signal

INTB_ALL

5 V tolerant Output

Low

Interrupt request signal

ALE

5 V tolerant Input

High

Address strobe signal (Function2/3)

A(7:1)

5 V tolerant Input

Address input (Function1)

D(15:0)

I/O

5 V tolerant I/O

Data bus (I/O) (Function1)

AD(7:0)

I/O

5 V tolerant I/O

Address/data multiplexed bus (I/O) (Function2)

I/O

5 V tolerant I/O

Data bus (I/O) (Function3)

AD(7:1)

I/O

5 V tolerant I/O

Address/data multiplexed bus (I/O) (Function3)

D(15:8)

I/O

5 V tolerant I/O

Data bus (I/O) (Function3)

WRB

5 V tolerant Input

Low

Write command input

RDB

5 V tolerant Input

Low

Read command input

INT0B

5 V tolerant Output

Low

Interrupt request (INT Status 0)

INT1B

5 V tolerant Output

Low

Interrupt request (INT Status 1)

INT2B

5 V tolerant Output

Low

Interrupt request (INT Status 2)

ACTIVE

5 V tolerant Input

DMA-related pins active level select(Function2/3)

SCAN(1:0)

3.3 V Input 50 k

Ω Pull Down

Chip test pin.

5 V tolerant Output

Status output pin

EP1_DRQB

5 V tolerant Output

Low

DMA transfer request output pin of EP1

EP1_DACKB

5 V tolerant Input

Low

DMA transfer enable input pin of EP1

EP1_RDB

5 V tolerant Input

Low

DMA Read command input pin of EP1

EP1_TCB

5 V tolerant Input

Low

DMA terminal count input pin of EP1

FM21

3.3 V Input

NEC Electronics test pin

EP2_DRQB

5 V tolerant Output

Low

DMA transfer request output pin of EP2

EP2_DACKB

5 V tolerant Input

Low

DMA transfer enable input pin of EP2

EP2_WRB

5 V tolerant Input

Low

DMA Write command input pin of EP2

EP2_TCB

5 V tolerant Input

Low

DMA terminal count input pin of EP2

LD(15:0)

I/O

5 V tolerant I/O

Data bus (I/O) pin for external local bus

BUNRI

5V torelant Input

NEC Electronics test pin

RREF

Analog

Reference resistor

RPU

USB pull-up control

USB’s 1.5 k

Ω pull-up resistor control

RSDP

USB full speed D+ O

USB’s full speed D+ signal

I/O

USB high speed D+ I/O

USB’s high speed D+ signal

I/O

USB high speed D- I/O

USB’s high speed D

− signal

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