XRA1200 Datasheet, PDF (5/16 Pages) Exar Corporation – 8-BIT I2C/SMBUS GPIO EXPANDER

REV. 1.0.0
1.1.1 I²C-bus Addressing
XRA1200/1200P
8-BIT I2C/SMBUS GPIO EXPANDER
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: I²C ADDRESS MAP
A2
GND
GND
GND
GND
VCC
VCC
VCC
VCC
GND
GND
GND
GND
VCC
VCC
VCC
VCC
GND
GND
GND
GND
VCC
VCC
VCC
VCC
GND
GND
GND
GND
VCC
VCC
VCC
VCC
A1
SCL
SCL
SDA
SDA
SCL
SCL
SDA
SDA
SCL
SCL
SDA
SDA
SCL
SCL
SDA
SDA
GND
GND
VCC
VCC
GND
GND
VCC
VCC
GND
GND
VCC
VCC
GND
GND
VCC
VCC
A0
GND
VCC
GND
VCC
GND
VCC
GND
VCC
SCL
SDA
SCL
SDA
SCL
SDA
SCL
SDA
GND
VCC
GND
VCC
GND
VCC
GND
VCC
SCL
SDA
SCL
SDA
SCL
SDA
SCL
SDA
I²C ADDRESS
0x20 (0010 000X)
0x22 (0010 001X)
0x24 (0010 010X)
0x26 (0010 011X)
0x28 (0010 100X)
0x2A (0010 101X)
0x2C (0010 110X)
0x2E (0010 111X)
0x30 (0011 000X)
0x32 (0011 001X)
0x34 (0011 010X)
0x36 (0011 011X)
0x38 (0011 100X)
0x3A (0011 101X)
0x3C (0011 110X)
0x3E (0011 111X)
0x40 (0100 000X)
0x42 (0100 001X)
0x44 (0100 010X)
0x46 (0100 011X)
0x48 (0100 100X)
0x4A (0100 101X)
0x4C (0100 110X)
0x4E (0100 111X)
0x50 (0101 000X)
0x52 (0101 001X)
0x54 (0101 010X)
0x56 (0101 011X)
0x58 (0101 100X)
0x5A (0101 101X)
0x5C (0101 110X)
0x5E (0101 111X)
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