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MTCH6301-I/ML Datasheet(PDF) 7 Page - Microchip Technology

Part # MTCH6301-I/ML
Description  The MTCH6301 is a turnkey projected capacitive con-troller that allows easy integration of multi-touch and gestures to create a rich user interface in your design.
PDF  32 Pages
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Manufacturer  MICROCHIP [Microchip Technology]
Direct Link  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

MTCH6301-I/ML Datasheet(HTML) 7 Page - Microchip Technology

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 2012 Microchip Technology Inc.
DS41663A-page 7
MTCH6301 PROJECTED CAPACITIVE TOUCH CONTROLLER
.
4.3.2
UNUSED RX/TX PINS
Unused RX/TX pins are driven to Vss automatically,
and should be left as no connects.
4.3.3
RX/TX SCALING COEFFICIENTS
Scaling coefficient registers exist in RAM for each axis
(RX/TX) and must be modified in accordance with the
number of channels that are in use. Special attention
must be paid to sensor dimensions that have fewer
than 5 channels, which will have a smaller maximum
touch output value (coordinate).
The relationship between these constant, as well as the
maximum coordinates that will be transmitted are
displayed in Table 4-2.
4.3.4
SENSOR ORIENTATION
The final output orientation is configured via the
FLIPSTATE register. This register can be adjusted dur-
ing operation for applications where rotation occurs
during use.
Figure 4-2 shows the initial upright orientation
FLIPSTATE register values for all possible sensor
layouts.
TABLE 4-1:
PIN MAP ID CHART
Pin
Map ID
(TX)
Map ID
(RX)
RX0
27
8
RX1
26
7
RX2
25
6
RX3
12
5
RX4
11
4
RX5
10
3
RX6
9
2
RX7
1
1
RX8
0
0
RX9
24
9
RX10
23
10
RX11
22
11
RX12
21
12
TX0
13
—
TX1
6
—
TX2
3
—
TX3
2
—
TX4
4
—
TX5
7
—
TX6
28
—
TX7
29
—
TX8
30
—
TX9
14
—
TX10
15
—
TX11
16
—
TX12
5
—
TX13
8
—
TX14
34
—
TX15
33
—
TX16
32
—
TX17
31
—
Note:
Trace routing for sensors requires proper
design technique. Please refer to the
mTouch Sensing Solution design center at
www.microchip.com/mtouch for additional
information on correctly routing touch
sensor traces.
TABLE 4-2:
RX/TX SCALING
COEFFICIENTS
Number of
Channels
RX/TX
Scaling
Coefficient
Controller
Output Range
3
65535
[0-2047]
4
[0-3071]
5
[0-4095]
6
52429
7
43691
8
37449
9
32768
10
29127
11
26214
12
23831
13
21845
14
20165
15
18725
16
17476
17
16384
18
15420



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