SX8657IWLTRT Semtech, SX8657IWLTRT Datasheet - Page 17

• Manufacturer Part Number: SX8657IWLTRT
• Description: 58T7570
• Manufacturer: Semtech

Specifications of SX8657IWLTRT

• 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
• No. Of Pins: 20
• Resolution (bits): 12bit

ADVANCED COMMUNICATIONS & SENSING
The parameter SETDLY sets the settling time between the consecutive conversions of the same channel.
In most applications, SETDLY can be set to minimum (0.5us). However, in some particular applications where
an accuracy of 1LSB is required SETDLY may need to be increased.
Rev 1 – 25
th
July 2011
FILT
0
1
2
3
Nfilt Function
1
3
5
7
c
No average.
c
3 ADC samples are averaged.
c
5 ADC samples are averaged.
s
c
7 ADC samples are sorted and the 3 center samples are averaged.
n
n
max 1
n
n
=
=
=
=
Figure 15 – Digital Processing Block Diagram
Figure 16 – POWDLY and SETDLY (FILT=2)
1
-- -
3
s
1
-- -
3
1
-- -
5
n
Table 5 – Digital Processing Functions
4079
-- -- -- -- -- - - s
4095
4079
- - -- -- -- -- - - s
4095
4079
- - -- -- -- -- - - s
4095
s
m ax2
a
n
n
+
c
+
+
n
s
b
s
s
n 1
n 1
s
+
a
Resistive Touchscreen Controller with Proximity Sensing
–
–
N
s
1
c
s
+
+
17
b
∑
N
i
s
s
n 2
n 2
0
1
–
s
s
–
c
n
i
+
s
s
min 1
n 3
–
+
s
n 4
s
m in 2
–
SX8657/SX8658
Haptics Enabled 4/5-Wire
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