BU21029GUL Datasheet, PDF (2/29 Pages) Rohm – 4-wire Resistive Touch Screen Controller

BU21029GUL
●Pin Configuration
Top View
1234
A YP XN YN AD0
B ^{XP PGND AD1 SDA}
C ^{PVDD AUX RSTB SCL}
D VREF GND VDD INT
●Equivalent Circuit
●Pin Description
Datasheet
Pin Pin
No Name
I/O
Description
A1
YP
I/O YP channel input
A2
XN
I/O XN channel input
A3
YN
I/O YN channel input
A4 AD0
I Slave address input bit0
B1
XP
I/O XP channel input
B2 PGND
- Ground for touch screen drivers
B3 AD1
I Test input(*1)
B4 SDA
C1 PVDD
I/O Serial data(*2)
-
Power supply for touch screen
drivers.
C2 AUX
I Auxiliary channel input
C3 RSTB
I System reset(*3)
C4 SCL
D1 VREF
I Serial clock(*2)
-
Regulator output for control
logic.(*4)
D2 GND
- Ground
D3 VDD
- Power supply
D4 INT
O
Interrupt output. Pin polarity with
active low.
(*1) Connect AD1 to GND.
(*2) SCL and SDA need a pull-up resistor greater than 2.2kΩ.
(*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
D
D
D
A
D
-
A
C
-
D
A
C
-
-
-
B
PAD
PAD
Figure A.
PAD
Figure B.
PAD
Figure C.
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TSZ22111・15・001
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Figure D.
TSZ02201-0Y1Y0F300120-1-2
11.Nov.2013 Rev.002