Aaeon PCM-4330 Instructions Manual page 74

DACTRL
PWR
Bit Name
1 LOAD
0 DATA
The DA converter used on-board is a 12-bit converter from Linear Technology
(LTC1451). To avoid damaging the display, always check that the desired value is
supported by the connected display.
ADCTRL
PWR
Bit Name
1 CS
0 DATA
A 10-bit AD converter from Linear Technology (LTC1392) is used on-board. This
component also contains a temperature sensor. The 5 V supply voltage is measured
internally by a multiplexer of the LTC1392. Before the LTC1392. chip, an eight
channel multiplexer is put in line. This multiplexer measures several voltages on the
board. Please refer to the following table for the analog multiplexer input signals:
Channel 1
Channel 2
Channel 3
Channel 4
Channel 5
Channel 6
Channel 7
Channel 8
Before programming the LTC1390 or LTC1392. converters, please refer to the com-
ponent data sheets.
RES RES RES
x x x
x x x
D7 D6 D5
Funtion
Load impulse for DA converter
Data for DA converter
RES RES RES
x x x
x x x
D7 D6 D5
Function
Chip select for multiplexer and AD converter
Data for multiplexer and from AD converter
Programming voltage (12 Volt)
12 Volt
5 Volt (switched) voltage for LC-display
12 Volt (switched) voltage for LC-display
Keyboard voltage (5 Volt)
Positive contrast voltage (max. 30 Volt)
Negative contrast voltage (max. 30 Volt)
Battery voltage (3 volt)
RES RES RES
x x x
x x x
D4 D3 D2
RES RES RES
x x x
x x x
D4 D3 D2
LOAD DATA
x 0
w r/w
D1 D0
CS DATA
x x
w r/w
D1 D0