BU21049GUL Datasheet, PDF (2/26 Pages) Rohm – 4-wire Resistive Touch Screen Controller

BU21049GUL
●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
PAD
Datasheet
●Pin Description
Pin Pin
No Name
A1
YP
A2
XN
A3
YN
A4 AD0
B1
XP
B2 PGND
B3 AD1
B4 SDA
C1 PVDD
C2 AUX
C3 RSTB
C4 SCL
D1 VREF
D2 GND
D3 VDD
D4 INT
I/O
Description
I/O YP channel input
Equivalent
circuit
D
I/O XN channel input
D
I/O YN channel input
D
I Slave address input bit0
A
I/O XP channel input
D
- Ground for touch screen drivers
-
I Test input(*1)
A
I/O Serial data(*2)
C
-
Power supply for touch screen
drivers.
-
I Auxiliary channel input
D
I System reset(*3)
A
I Serial clock(*2)
-
-
Regulator output for control
logic.(*4)
-
- Ground
-
- Power supply
-
O
Interrupt output. Pin polarity with
active low.
B
(*1) AD1 connect to GND.
(*2) SCL and SDA need pull-up with over 2.2kΩ resister.
(*3) RSTB connect to VDD if not control.
(*4) VREF bypass to GND with a 1.0uF capacitor and cannot connect to supply.
PAD
Fig.A
Fig.B
PAD
PAD
Fig.C
Fig.D
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TSZ22111・15・001
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TSZ02201-0Y1Y0F300010-1-2
31.JAN.2012 Rev.001