BU21049GUL Datasheet, PDF (8/26 Pages) Rohm – 4-wire Resistive Touch Screen Controller

BU21049GUL
Datasheet
Serial interface Command byte 0(CID=0)
MSB
LSB
D7
D6
D5
D4
D3
D2
D1
D0
0
ADDR[3:0]
PAGE
SWRST
STP
Bit D7: Command Byte ID
0= Command Byte 0(read/write data registers address specified by ADDR(Bit D6-D3).
Bits D6-D3: ADDR
D2: PAGE
“ADDR” and “PAGE” can select access register address as the below.
BU21049GUL Register map
PAGE ADDR INI
7
0 0x0 0x20 RSV0
0x1 0xA6 MAV
6
RSV0
5
CALIB
AVE
4
INTRM
3
RSV0
-
2
RSV0
1
RSV0
SMPL
0
RSV0
0x2 0x04
INTVL_TIME
TIME_ST_ADC
0x3 0x10
EVR_X
0x4 0x10
EVR_Y
0x5 0x10
EVR_XY
0x6 0x00
RSV0
0x7 0x00
RSV0
0x8 0x00 -
-
-
-
RSV0
0x9 0x0F -
-
-
PIMIR_X
0xA 0x0F -
-
-
PIMIR_Y
0xB 0x72 RM8 STRETCH PU90K DUAL
PIDAC_OFS
0xC 0x00 -
PVDD
-
AVDD
0xD 0x00 TEST AUTO PDM
-
BUSY ACTIVE CALIB TOUCH
0xE 0x02
HW_IDH
_DONE
0xF 0x49
HW_IDL
1
0x0 0x00 SW_YP_ SW_YP_ SW_YN_ SW_YN_ SW_XP_ SW_XP_ SW_XN_ SW_XN_
POW GND POW GND POW GND POW GND
0x1 0x00 RSV VREFN_XN VREFN_YN SW_AUX SW_YPM SW_YNM SW_XPM SW_XNM
0x2-0xF -
Reserved
(*1)RSV0 must be set 0.
(*2)INI= Initial value
Bit D1: SWRST
1= The BU21049GUL initialize all register, stop all operation and change state to power down. SWRST is automatically set
“0”.
Bit D0: STP
1= The BU21049GUL abort current running conversion and change state to power down. STP is automatically set “0”.
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TSZ02201-0Y1Y0F300010-1-2
31.JAN.2012 Rev.001