BU21028FV-M Datasheet, PDF (10/36 Pages) Rohm – 4-wire Resistive Touch Screen Controller

BU21028FV-M
Table 4. Serial interface Command Byte 0(CID=0)
MSB
D7
D6
D5
D4
D3
D2
0
ADDR[3:0]
PAGE
Bit D7: Command Byte ID
0=Reads/writes on data register addresses specified by ADDR (Bit D6-D3).
Bits D6-D3: ADDR
D2: PAGE
Register addresses that “ADDR” and “PAGE” can access are listed below.
D1
SWRST
LSB
D0
STP
Table 5. BU21028FV-M Register Map
PAGE ADDR INI
7
6
5
4
3
2
1
0
0
0x0 0x20 RSV0 RSV0 CALIB INTRM RSV0 RSV0 RSV0 RSV0
0x1 0xA6 MAV
AVE
-
SMPL
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 -
RSV1 RSV0 RSV0
-
RSV1 RSV0 RSV0
0xD 0x00 TEST AUTO PDM
-
BUSY ACTIVE CALIB TOUCH
0xE 0x02
HW_IDH
_DONE
0xF 0x29
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 RSV0 RSV0 RSV0 SW_AUX SW_YPM SW_YNM SW_XPM SW_XNM
0x2-0x4 -
Reserved
0x5 0x03 RSV0 DPRM RSV0 RSV0 RSV0 RSV0 RSV1 RSV1
0x6 0x00 RSV0 RSV0 RSV0 RSV0 RSV0 RSV0 RSV0 EX_TIME_ST
0x7-0xF -
Reserved
(*1) RSV0 must be set to 0.
(*2) RSV1 must be set to 1
Bit D1: SWRST
1= Initializes all registers, stops all operations, and changes state to power-down (SWRST is automatically set “0”.)
Bit D0: STP
1= Aborts currently running conversion and changes the state to power-down (STP is automatically set to “0”.)
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TSZ02201-0L5L0F300720-1-2
27.May.2016 Rev.002