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BU21049GUL-E2 Folha de dados(PDF) 6 Page - Rohm |
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BU21049GUL-E2 Folha de dados(HTML) 6 Page - Rohm |
6 / 26 page BU21049GUL TSZ02201-0Y1Y0F300010-1-2 © 2011 ROHM Co., Ltd. All rights reserved. 31.JAN.2012 Rev.001 www.rohm.co TSZ22111・15・001 6/23 Datasheet Datasheet ●Host interface specification The BU21049GUL operates as I2C slave device. The host processor transmit address byte after start condition when start communication with the BU21049GUL. In case of operate convert function or write to register of the BU21049GUL, the host processor transmit command byte after receive acknowledge of address byte. Communication with the BU21049GUL is end when receive stop condition. Address byte Slave address for 2-wire interface is placed in the upper 7-bit of address byte and the last bit is READ/WRITE. The upper 6-bit of slave address is fixed to “100000”, and the last bit of slave address is selected by “AD0” input. Serial interface slave address byte MSB D7 D6 D5 D4 D3 D2 D1 LSB D0 10 0000 A0 R/W Bit D1: A0 Slave address bit0 (AD0) Bit D0: R/W 1=read (reading data) 0=write (writing data) Command byte The BU21049GUL operates depend on command byte. The host processor set CID (D7) to 1 when perform convert function or set CID(D7) to 0 when perform register access.. Serial interface Command byte 1(CID=1) MSB D7 D6 D5 D4 D3 D2 D1 LSB D0 1CMSK PDM STP CF Bit D7: Command Byte ID 1= Command Byte 1(start conversion function according to CF(Bit D6-D3) Bits D6-D4: CF Convert function select as detailed the below. BU21049GUL Convert function List CF Description 0x0 Touch screen scan function: X, Y, Z1 and Z2 coordinates and converted. 0x1 NOP 0x2 Auxiliary input converted. 0x3 Reserved 0x4 Free scan function: Drivers status and input of A/D assignment by Host. 0x5 Calibration: Paramters which used dual touch detection calibrated. 0x6 NOP 0x7 NOP 0x8 X+, X- drivers status. 0x9 Y+, Y- drivers status. 0xA Y+, X- drivers status. 0xB NOP 0xC Touch screen scan function: X coordinate converted. 0xD Touch screen scan function: Y coordinate converted. 0xE Touch screen scan function: Z1 and Z2 coordinates converted. 0xF Reserved |
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Descrição semelhante - BU21049GUL-E2 |
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