BU21029MUV Datasheet, PDF (2/29 Pages) Rohm – 4-wire Resistive Touch Screen Controller

BU21029MUV
●Pin Configuration
●Pin Description
Datasheet
AD0 16
AD1 17
SDA 18
SCL 19
INT 20
10 (N.C.)
9 XP
8 AUX
7 PVDD
6 DVDD_OUT
TOP VIEW (LEAD SIDE DOWN)
INT 20
SCL 19
SDA 18
AD1 17
AD0 16
6 DVDD_OUT
7 PVDD
8 AUX
9 XP
10 (N.C.)
BOTTOM VIEW (LEAD SIDE UP)
●Equivalent Circuit
Pin
Pin
No
Name
1 RSTB
I/O
Description
I System reset (*3)
2 DVDD_IN
- Regulator input for control logic.(*4)
3 VDD
- Power supply
4 GND
- Ground
5 VREF
- Regulator input for control logic.(*4)
6 DVDD_OUT - Regulator output for control logic.(*4)
7 PVDD
-
Power supply for touch screen
drivers.
8 AUX
I Auxiliary channel input
9 XP
I/O XP channel input
10 (NC)
--
11 (NC)
--
12 YP
I/O YP channel input
13 XN
I/O XN channel input
14 YN
I/O YN channel input
15 PGND
- Ground for touch screen drivers
16 AD0
I Slave address input bit0
17 AD1
I Test input (*1)
18 SDA
I/O Serial data (*2)
19 SCL
20 INT
I Serial clock (*2)
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
A
-
-
-
-
-
-
D
D
-
-
D
D
D
-
A
A
C
C
B
PAD
PAD
Figure A.
PAD
Figure B.
PAD
Figure C.
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Figure D.
TSZ02201-0Y1Y0F300110-1-2
11.Nov.2013 Rev.004