SX8652ICSTRT Semtech, SX8652ICSTRT Datasheet - Page 23

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

Revision V1.6/July 2010
©2010 Semtech Corp.
ADVANCED COMMUNICATIONS & SENSING
RegSoftReset
RegChanMsk
RegCtrl2
RegStat
Register
The host status reading allows the host to read the status of the SX8652. The data goes from the SX8652
towards the host. Host writing to this register is ignored.
Bits
7:4
3:0
4:0
7:0
7
6
5
4
3
0
0
0
7
6
5
Default
00000
0000
0x00
0
1
1
0
0
0
0
0
0
0
0
1
reserved
SETDLY
XCONV
YCONV
Z1CONV
Z2CONV
AUXCONV
reserved
reserved
reserved
CONVIRQ
PENIRQ
RSTEVENT
reserved
If the host writes the value 0xDE to this register, then the SX8652 will be reset.
Any other data will not affect the SX8652
Table 13. SX8652 Register
Settling time while filtering (± 10%)
When filtering is enabled, the channel will initially bias for a time of
POWDLY for the first conversion, and for a time of SETDLY for each
subsequent conversion in a filter set.
0000: Immediate (0.5 us)
0001: 1.1 us
0010: 2.2 us
0011: 4.4 us
0100: 8.9 us
0101: 17.8 us
0110: 35.5 us
0111: 71.0 us
0: no sample
1: Sample X channel
0: no sample
1: Sample Y channel
0: no sample
1: Sample Z1 channel
0: no sample
1: Sample Z2 channel
0: no sample
1: Sample AUX channel
0: no IRQ pending
1: Conversion sequence finished
IRQ is cleared by the channel data read command
Operational in pen detect mode
0: no IRQ pending
1: Pen detected IRQ pending
IRQ is cleared by the RegStat reading
A reset event has occurred
15kV ESD Low Power 4-Wire / 5-Wire Resistive
Page 23
Touchscreen Controller with SPI Interface
Description
1000: 0.14 ms
1001: 0.28 ms
1010: 0.57 ms
1011: 1.14 ms
1100: 2.27 ms
1101: 4.55 ms
1110: 9.09 ms
1111: 18.19 ms
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DATASHEET
SX8652