BU21028FV-M Datasheet, PDF (26/36 Pages) Rohm – 4-wire Resistive Touch Screen Controller

BU21028FV-M
Table 22. STATUS Register (PAGE=0, ADDR=0xD, Reset value=0x00, Read only)
D7
D6
D5
D4
D3
D2
D1
TEST AUTO PDM
-
BUSY
ACTIVE
CALIB
_DONE
Bit D7: TEST
This bit will become “1” during TEST mode.
D0
TOUCH
Bit D6: AUTO
This bit will become “1” at conversion function 0.
Bit D5: PDM
PDM setting value of command byte1
Bit D3: BUSY
This bit will become “1” during conversion of 1^st coordinate data.
Bit D2: ACTIVE
This bit will become “1” when internal analog circuit is active.
Bit D1: CALIB_DONE
This bit will become “1” in case that dual touch detection parameter adjustment is finished by command (CF=0x5).
This bit will be clear when “1” is written on this bit.
Bit D0: TOUCH
This bit will become “1” when pen-down is internally detected.
Table 23. HW_ID1 Register (PAGE=0, ADDR=0xE, Reset value=0x02, Read only)
D7
D6
D5
D4
D3
D2
D1
D0
HW_IDH
Bits D7-D0: HW_IDH
High 8bit of IC’s ID
Table 24. HW_ID2 Register (PAGE=0, ADDR=0xF, Reset value=0x29, Read only)
D7
D6
D5
D4
D3
D2
D1
D0
HW_IDL
Bits D7-D0: HW_IDL
Low 8-bit of IC’s ID
Table 25. FREE_SW1 Register (PAGE=1, ADDR=0x0, Reset value=0x00)
D7
D6
D5
D4
D3
D2
D1
D0
SW_YP_ SW_YP_ SW_YN_ SW_YN_ SW_XP_ SW_XP_ SW_XN_ SW_XN_
POW GND POW GND POW GND POW GND
Bits D7-D0: SW_**_POW(GND)
Driver setting at conversion function 4(Free scan)
Drive to “+” by set POW and “-”by set GND, Must not set “+”and“-”to one terminal at the same time.
** = the corresponding terminal name
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TSZ02201-0L5L0F300720-1-2
27.May.2016 Rev.002