BU21029GUL datasheet(2/29 Pages) ROHM

No de pièce	BU21029GUL

Description	4-wire Resistive Touch Screen Controller

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Fabricant	ROHM [Rohm]

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Datasheet

BU21029GUL

TSZ02201-0Y1Y0F300120-1-2

11.Nov.2013 Rev.002

www.rohm.co.jp

TSZ22111・15・001

●Pin Configuration

●Pin Description

No

Name

I/O

Description

Equivalent

circuit

A1

YP

I/O

YP channel input

D

A2

XN

I/O

XN channel input

D

A3

YN

I/O

YN channel input

D

A4

AD0

I

Slave address input bit0

A

B1

XP

I/O

XP channel input

D

B2

PGND

-

Ground for touch screen drivers

-

B3

AD1

I

Test input(*1)

A

B4

SDA

I/O

Serial data(*2)

C

C1

PVDD

-

Power supply for touch screen

drivers.

-

C2

AUX

I

Auxiliary channel input

D

C3

RSTB

I

System reset(*3)

A

C4

SCL

I

Serial clock(*2)

C

D1

VREF

-

Regulator

output

for

control

logic.(*4)

-

D2

GND

-

Ground

-

D3

VDD

-

Power supply

-

D4

INT

O

Interrupt output. Pin polarity with

active low.

B

(*1) Connect AD1 to GND.

(*2) SCL and SDA need a pull-up resistor greater than 2.2k

Ω.

(*3) Connect RSTB to VDD if it will not be controlled.

(*4) Bypass VREF, DVDD_IN, DVDD_OUT to GND with a 1.0uF capacitor

and do not

connect to the supply.

●Equivalent Circuit

PAD

Figure A.

Figure B.

Figure C.

Figure D.

1

2

3

4

A

B

C

D

Top View

VREF

GND

VDD

INT

PVDD

AUX

RSTB

SCL

XP

PGND

AD1

SDA

YP

XN

YN

AD0

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