SX8658IWLTRT Semtech, SX8658IWLTRT Datasheet - Page 47
SX8658IWLTRT
Manufacturer Part Number
SX8658IWLTRT
Description
58T7572
Manufacturer
Semtech
Datasheet
1.SX8658IWLTRT.pdf
(61 pages)
Specifications of SX8658IWLTRT
Controller Type
Resistive Touch Screen
Ic Interface Type
I2C, Serial
Supply Voltage Range
2.3V To 3.6V
Operating Temperature Range
-40°C To +85°C
Resolution (bits)
12bit
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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
47
SX8657/SX8658
Haptics Enabled 4/5-Wire
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