SX8654ICSTRT SEMTECH [Semtech Corporation], SX8654ICSTRT Datasheet - Page 18

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

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 17 – Digital Processing Block Diagram
Figure 18 – 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
+
+
18
b
∑
N
i
s
s
n 2
n 2
0
1
–
s
s
–
c
n
i
+
s
s
min 1
n 3
SX8654/SX8655/SX8656
–
+
s
n 4
s
m in 2
–
Haptics Enabled 4/5-Wire
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