BU21049GUL Datasheet, PDF (20/26 Pages) Rohm – 4-wire Resistive Touch Screen Controller

BU21049GUL
Datasheet
PAGE=0,ADDR=0x3 ～ 0x5: EVR
D7
D6
D5
D4
D3
D2
D1
D0
EVR_*[7:0]
Bits D7-D0: EVR_*
Gain setting 1 for dual touch detection. When using 2 points detection function, it is necessary to set here before conversion.
It corresponds X, Y and XY (Z). EVR_XY is not necessary to change from initial value.
PAGE=0, ADDR=0x9, 0xA: PIMIR
D7
D6
D5
D4
D3
D2
D1
D0
-
-
-
PIMIR_*[4:0]
Bits D7-D0: PIMIR_*
Gain setting 2 for dual touch detection. It is not necessary to change from initial value.
It corresponds X and Y.
PAGE=0, ADDR=0xB: CFR3
D7
D6
D5
D4
D3
D2
D1
D0
RM8 STRETCH PU90K DUAL
PIDAC_OFS[3:0]
Bit D7: RM8
Coordinate resolution setting
0= 12bit
1= 8bit
Bit D6: STRETCH
SCL_STRETCH function setting
0= off
1= on
Bit D5 : PU90K
Internal pull-up resistance for touch detection setting
0= about 90kΩ
1= about 50kΩ
Bit D4: DUAL
Dual touch detection function setting
0= Off
1= On
Bits D3-D0: PIDAC_OFS
Dual touch detection circuit adjustment setting. It is not necessary to change from initial value.
PAGE=0, ADDR=0xC: LDO
D7
D6
D5
D4
D3
D2
D1
D0
-
PVDD[2:0]
-
AVDD[2:0]
Bits D6-D4: PVDD
Regulator for apply to panel output setting.
By increasing voltage, the effect which reduces the influence of the exogenous noise from a panel interface terminal is
acquired.
PVDD setting table
value output
0
1.500V
1
1.556V
2
1.615V
3
1.680V
4
1.750V
5
1.826V
6
1.909V
7
2.000V
Bits D2-D0: AVDD
The output voltage setting of the analog circuit regulator.
The relationship of setting value and output voltage is same as PVDD.
It is not possible to change from initial value when use with VDD or PVDD lower supply than 2.5V.
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TSZ22111・15・001
20/23
TSZ02201-0Y1Y0F300010-1-2
31.JAN.2012 Rev.001