MK715R 查看數據表（PDF） - Integrated Circuit Systems
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MK715R Datasheet PDF : 22 Pages
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MK715
Calculating Touch Resistance
There are a total of six measurements possible:
RDPRESB RDPRESA
0
0
0
0
0
1
0
1
1
0
1
0
XSEL
0
1
0
1
0
1
DRIVE
YH, YL
XH, XL
YH, XL
XH, YL
YH, XL
XH, YL
PIN MEASURED
XH
YH
XH
YH
YL
XL
RESULT
C
D
E
F
G
H
where the result is a number from 0 to 1023.
From simple network theory, RTOUCH can be represented in many ways, 3 are given below:
RTOUCH
=
RX
·
D
1023
·
(
G
E
-
1)
where RX = X plate resistance
or
RTOUCH
=
RY
·
C
1023
· ( H - 1)
F
where RY = Y plate resistance
or
RTOUCH =
RX
E
·D
1023
·
(1023 - E) - RY
+
RY · C
1023
17
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