参数资料
型号: XRA1206IL16-F
厂商: Exar Corporation
文件页数: 11/15页
文件大小: 0K
描述: IC I/O EXPANDER I2C 8B 16QFN
标准包装: 490
接口: I²C,SM 总线
输入/输出数: 8
中断输出:
频率 - 时钟: 400kHz
电源电压: 1.65 V ~ 3.6 V
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 16-VFQFN 裸露焊盘
供应商设备封装: 16-QFN(3x3)
包装: 散装
其它名称: 1016-1718
XRA1206
5
REV. 1.0.0
8-BIT I2C/SMBUS GPIO EXPANDER WITH INTEGRATED LEVEL SHIFTERS
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
XRA1206 has up to 4 I2C slave addresses using the A0 address line. Table 1 below shows the different
addresses that can be selected.
TABLE 1: I C ADDRESS MAP
C ADDRESS
GND
0x40 (0100 000X)
VCC
0x42 (0100 001X)
SCL
0x50 (0101 000X)
SDA
0x52 (0101 001X)
1.1.2
I2C Read and Write
A read or write transaction is determined by bit-0 of the slave address. If bit-0 is ’0’, then it is a write
transaction. If bit-0 is ’1’, then it is a read transaction.
1.1.3
I2C Command Byte
An I2C command byte is sent by the I2C master following the slave address. The command byte indicates the
address offset of the register that will be accessed. Table 2 below lists the command bytes for each register.
TABLE 2: I C COMMAND BYTE (REGISTER ADDRESS)
COMMAND BYTE
REGISTER NAME DESCRIPTION
READ/WRITE
DEFAULT VALUES
0x00
GSR - GPIO State
Read-Only
0xXX
0x01
OCR - Output Control
Read/Write
0xFF
0x02
PIR - Input Polarity Inversion
Read/Write
0x00
0x03
GCR - GPIO Configuration
Read/Write
0xFF
0x04
PUR - Input Internal Pull-up Resistor Enable/Disable
Read/Write
0x00
0x05
IER - Input Interrupt Enable
Read/Write
0x00
0x06
TSCR - Output Three-State Control
Read/Write
0x00
0x07
ISR - Input Interrupt Status
Read
0x00
0x08
REIR - Input Rising Edge Interrupt Enable
Read/Write
0x00
0x09
FEIR - Input Falling Edge Interrupt Enable
Read/Write
0x00
0x0A
IFR - Input Filter Enable/Disable
Read/Write
0xFF
2
A0
I2
2
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