BU21028FV-M Datasheet, PDF (3/36 Pages) Rohm – 4-wire Resistive Touch Screen Controller

BU21028FV-M
Pin Configuration(s)
Pin Description(s)
GNDP 1
AD0 2
(NC) 3
AD1 4
SDA 5
SCL 6
INT 7
RSTB 8
DVDD_IN 9
VDD 10
(TOP VIEW)
Equivalent Circuit
Pin Description(s)
20 YN
19 XN
18 YP
17 XP
16 AUX
15 VDDP
14 DVDD_OUT
13 (NC)
12 VREF
11 GND
Pin
Pin
No
Name
1 GNDP
2 AD0
3 (NC)
4 AD1
5 SDA
6 SCL
7 INT
8 RSTB
9 DVDD_IN
10 VDD
11 GND
12 VREF
13 (NC)
14 DVDD_OUT
15 VDDP
16 AUX
17 XP
18 YP
19 XN
20 YN
I/O
Description
- Ground for touch screen drivers
I Slave address input bit0
- - (Note4)
I Test input (Note1)
I/O Serial data (Note2)
I Serial clock (Note2)
O
Interrupt output.
Pin polarity with active low.
I System reset
-
Regulator input for control logic.
(Note3)
- Power supply
- Ground
-
Regulator input for control logic.
(Note3)
- - (Note4)
-
Regulator output for control logic.
(Note3)
-
Power supply for
touch screen drivers.
I Auxiliary channel input
I/O XP channel input
I/O YP channel input
I/O XN channel input
I/O YN channel input
(Note1) Connect AD1 to GND.
(Note2) SCL and SDA need a pull-up resistor greater than 2.2kΩ.
(Note3) Bypass VREF, DVDD_IN, DVDD_OUT to GND with a 1.0uF capacitor
and do not connect to the supply.
(Note4) Non-connect internal. Please connect to GND or OPEN.
Equivalent
circuit
-
A
-
A
C
C
B
A
-
-
-
-
-
-
-
D
D
D
D
D
PAD
PAD
Figure A.
PAD
Figure B.
PAD
Figure C.
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TSZ22111 • 15 • 001
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Figure D.
TSZ02201-0L5L0F300720-1-2
27.May.2016 Rev.002