SX8650 Datasheet, PDF (29/56 Pages) Semtech Corporation – World’s Lowest Power & Smallest Footprint 4-wire Resistive Touchscreen Controller with 15kV ESD

SX8650
World’s Lowest Power & Smallest Footprint 4-wire
Resistive Touchscreen Controller with 15kV ESD
ADVANCED COMMUNICATIONS & SENSING
DATASHEET
4.6. Host Interface and Control
The host interface consists of I2C (SCL and SDA) and the NIRQ, A0, NRST signals.
The I2C implemented on the SX8650 is compliant with:
- Standard Mode (100 kbit/s) & Fast Mode (400 kbit/s)
- Slave mode
- 7 bit slave address
4.6.1. I2C Address
Pin A0 defines the LSB of the I2C address. It is shown on Figure 27.
.
SX8650 Slave Address(7:1) =
1 0 0 1 0 0 0 with pin A0 connected to ground
1 0 0 1 0 0 1 with pin A0 connected to VDD
Figure 27. I2C slave address
Upon request of the customer, a custom I2C address can be burned in the NVM.
The host uses the I2C to read and write data and commands to the configuration and status registers. During a conversion,
the I2C clock can be stretched until the end of the processing.
Channel data read is done by I2C throughput optimized formats.
The supported I2C access formats are described in the next sections:
- I2C Write Registers
- I2C Read Registers
- I2C Host Commands
- I2C Read Channels
ACS Revision V2.15/October 2009
©2009 Semtech Corp.
Page 28
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