Part II: PCM-959/phyCORE-OMAP44xx Carrier Board
phyCORE-OMAP44xx
114
©
PHYTEC Messtechnik GmbH
2012
L-760e_1
2.1.3.7.2 PDI Power Connector (X13)
The display power connector X13 (AMP microMatch 8-338069-2) provides all supply voltages needed to supply
the display and a backlight, and the brightness control.
2.1.3.7.3 Touch Screen Connectivity
As many smaller applications need a touch screen as user interface, provisions are made to connect 4-wire
resistive touch screens to the PDI data connector X12 (pins 34 - 37, refer to
screen panel are processed by a STMPE811 touch panel controller at U41. The touch panel controller is
connected to I
2
C bus I2C4 at address 0x41. By changing jumper J9 the address can be set to 0x44 if needed
An additional interrupt output is connected to GPIO 117 (X1A39 on the phyCORE-Connector) of the OMAP44xx.
Pin #
Signal
I/O
SL
Description
1
GND
-
-
Ground
2
VCC_3V3
O
3.3 V
3.3 V power supply display
3
GND
-
-
Ground
4
VCC_5V
O
5 V
5 V power supply display
5
GND
-
-
Ground
6
VCC_5V
O
5 V
5 V power supply display
7
GND
-
-
Ground
8
VCC_5V
O
5 V
5 V power supply display
9
GND
-
-
Ground
10
LS_BRIGHT
O
3.3 V
PWM brightness output
1
1.
11
VCC_12_24
O
+12 V - +24 V
Power Supply for backlight;
corresponds to the input
voltage at power jack X6
12
VCC_12_24
O
+12 V - +24 V
Power Supply for backlight;
corresponds to the input
voltage at power jack X6
Table 53:
PDI Power Connector X32 Signal Description
Caution:
There is no protective circuitry for the backlight. The output for the backlight supply voltage connects directly
to the main power input at X6. Thus the main supply voltage must match the input voltage of your backlight
power circuitry.
Содержание phyCORE-OMAP44 Series
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