SX8652ICSTRT Semtech, SX8652ICSTRT Datasheet - Page 20

• Manufacturer Part Number: SX8652ICSTRT
• Description: 4/5-wire Resistive Touch Screen Controller (SPI)
• Manufacturer: Semtech

6.1.5. Invalid Qualified Data
The SX8652 will return 0xFFFF data in case of invalid qualified data.
This occurs:
Revision V1.6/July 2010
©2010 Semtech Corp.
ADVANCED COMMUNICATIONS & SENSING
Writing Register
Reading Register
CS
SCLK
DIN
DOUT
Reading Channel Data
CS
SCLK
DIN
DOUT
Other command
When the SX8652 has read all the channel data in the FIFO
When a conversion is done without a pen being detected.
CS
SCLK
DIN
DOUT
CS
SCLK
DIN
DOUT
0 0 1
0 0 0
0 1 0
CMD
RA[4:0]
RA[4:0]
Single Read
Single Read
Single Read
7 6 5 4 3 2 1 0
7 6 5 4 3 2 1 0
11 10 9 8 7 6 5 4 3 2 1 0
Figure 20. Data channel format
15kV ESD Low Power 4-Wire / 5-Wire Resistive
Page 20
Touchscreen Controller with SPI Interface
Multiple Read
Multiple Read
7 6 5 4 3 2 1 0
7 6 5 4 3 2 1 0
Multiple Read
11 10 9 8 7 6 5 4 3 2 1 0
Don’t care bit
Single read
Multiple read
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SX8652