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XRA1200P Datasheet(PDF) 5 Page - Exar Corporation |
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XRA1200P Datasheet(HTML) 5 Page - Exar Corporation |
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5 / 16 page  XRA1200/1200P 5 REV. 1.0.0 8-BIT I2C/SMBUS GPIO EXPANDER 1.1.1 I2C-bus Addressing There could be many devices on the I2C-bus. To distinguish itself from the other devices on the I2C-bus, the XRA1200/1200P has up to 32 I2C slave addresses using the A2-A0 address lines. Table 1 below shows the different addresses that can be selected. TABLE 1: I C ADDRESS MAP C ADDRESS GND SCL GND 0x20 (0010 000X) GND SCL VCC 0x22 (0010 001X) GND SDA GND 0x24 (0010 010X) GND SDA VCC 0x26 (0010 011X) VCC SCL GND 0x28 (0010 100X) VCC SCL VCC 0x2A (0010 101X) VCC SDA GND 0x2C (0010 110X) VCC SDA VCC 0x2E (0010 111X) GND SCL SCL 0x30 (0011 000X) GND SCL SDA 0x32 (0011 001X) GND SDA SCL 0x34 (0011 010X) GND SDA SDA 0x36 (0011 011X) VCC SCL SCL 0x38 (0011 100X) VCC SCL SDA 0x3A (0011 101X) VCC SDA SCL 0x3C (0011 110X) VCC SDA SDA 0x3E (0011 111X) GND GND GND 0x40 (0100 000X) GND GND VCC 0x42 (0100 001X) GND VCC GND 0x44 (0100 010X) GND VCC VCC 0x46 (0100 011X) VCC GND GND 0x48 (0100 100X) VCC GND VCC 0x4A (0100 101X) VCC VCC GND 0x4C (0100 110X) VCC VCC VCC 0x4E (0100 111X) GND GND SCL 0x50 (0101 000X) GND GND SDA 0x52 (0101 001X) GND VCC SCL 0x54 (0101 010X) GND VCC SDA 0x56 (0101 011X) VCC GND SCL 0x58 (0101 100X) VCC GND SDA 0x5A (0101 101X) VCC VCC SCL 0x5C (0101 110X) VCC VCC SDA 0x5E (0101 111X) 2 A2 A1 A0 I2 |
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