Specifications

Appendix D Daughterboard Controllers 109
Female Connector on the Touchscreen Cable
The touchscreen cable has five wires that terminate into a molded
12-pin dual row female connector. It also contains a 1K bit non-
volatile memory chip that stores screen linearization coefficients.
Table 21 shows the pin out for the female connector on the
touchscreen cable. The Molex part number for this connector is
70182-15-45-0906.
Table 21. Pin Out for the Female Connector (12-pin Dual Row) on the Touchscreen Cable
Pin # Signal Definition Supplied By Description
1
2
3
CLK
CE
DIO
NOVRAM clock
NOVRAM chip enable
NOVRAM data
Daughterboard
controller
Signals used by the controller to
store and retrieve linearization
coefficients from the non-volatile
RAM (NOVRAM) located on the
touchscreen cable.
4 VCC +5 VDC Host system The +5 volt supply input
provided by the host system. The
controller requires 70 mA
(typical), 85 mA (maximum),
+5% regulation, and 100 mV
maximum ripple and noise.
5 GND Signal ground Host system Provides the return path for the
supply current.
6 CGND Chassis ground Host system Provides a low impedance path to
chassis ground.
7 — Reserved — —
8 DRV Shield drive Daughterboard
controller
Provides a digitized sine-wave
output to drive the shield on the
touchscreen.
9
10
11
12
UR
LR
UL
LL
Upper right touch wire
Lower right touch wire
Upper left touch wire
Lower left touch wire
Daughterboard
controller
Bi-directional AC signals that
detect the current used to
determine the touch position.