SX8654ICSTRT SEMTECH [Semtech Corporation], SX8654ICSTRT Datasheet - Page 48

• Manufacturer Part Number: SX8654ICSTRT
• Description: Haptics Enabled 4/5-Wire Resistive Touchscreen Controller with Proximity Sensing
• Manufacturer: SEMTECH [Semtech Corporation]

ADVANCED COMMUNICATIONS & SENSING
Bits
Bits
Rev 1 – 25
7:4
3:0
7:5
3:2
4
Variable
TOUCHRATE
POWDLY
Variable
Reserved
TSTYPE
RPNDT
th
July 2011
Default
Default
0000
0000
001
00
0
Table 12 : RegTouch0 (Addr 0x00)
Description
Defines the touch coordinates acquisition rate:
0000 : OFF.
0001 : 10 cps
0010 : 20 cps
0011 : 40 cps
0100 : 60 cps
0101 : 80 cps
0110 : 100 cps
0111 : 200 cps
1000 : 300 cps
1001 : 400 cps
1010 : 500 cps
1011 : 1 kcps
1100 : 2 kcps
1101 : 3 kcps
1110 : 4 kcps
1111 : 5 kcps
Values above assume typical FOSCL, else vary accordingly.
Defines the bias settling time for each channel’s first conversion:
0000 : 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
1000 : 142 us
1001 : 284 us
1010 : 568 us
1011 : 1.14 ms
1100 : 2.27 ms
1101 : 4.55 ms
1110 : 9.09 ms
1111 : 18.19 ms
Values above assume typical FOSCH, else vary accordingly.
Description
Defines the type of touchscreen:
0 : 4-wire
1 : 5-wire
Defines the pen detection circuit’s pull-up resistor value:
00 : 114 kOhms
01 : 228 kOhms
10 : 57 kOhms
11 : 28 kOhms
Resistive Touchscreen Controller with Proximity Sensing
48
SX8654/SX8655/SX8656
Haptics Enabled 4/5-Wire
www.semtech.com