ald523d Advanced Linear Devices Inc (ALD), ald523d Datasheet - Page 8

• Manufacturer Part Number: ald523d
• Description: Multifunction 7-digit Serial Input Display Module Controller
• Manufacturer: Advanced Linear Devices Inc (ALD)

SELECTING AND CONFIGURING DISPLAY
SETTINGS
The ALD523D uses SEL0 and SEL1 control-input pins for
selecting different display sets “DGS0”, “DGS1”,
“DGS2”, and “DGS3”. Each display set “DGSx” has an
associated mode of operation “Mx”, unit display “UNTx”,
decimal point placement “LxDEC”, and multiplier scale
factors “±CALx”, where x=0, 1, 2 or 3.
The SEL0 and SEL1 switches have 4 logical states of
operations as described in Table 3. Each logical state
combination selects different measurement labels/units,
scale factors, decimal point location, and mode selections.
In all modes of operation, the SEL0 and SEL1 software
switch setting selections override the hardware jumper
functions of the DEC1 and DEC2 or M and Z switches
when either SEL0 or SEL1 are set to logical “1”.
When SEL0=0 and SEL1=0, the ALD523D selects
display set “DGS0”, which consists of a combination of
“M1”, “UNT1”, “+CAL1” and “−CAL1” parameters from
addresses 00H, 18H to 1FH, 30H to 37H, and 38H to 3FH
of the EEPROM memory, respectively. In the calibrated
reference mode (mode-A) and the display only mode
(mode-C), DEC1 and DEC2 hardware jumper switches are
used to place decimal point. In mode-B operation, no
decimal point is displayed.
When SEL0=1 and SEL1=0, the ALD523D selects
display set “DGS1”, which consists of a combination of
“M1”, “L1DEC”, “UNT1”, “+CAL1” and “−CAL1”
parameters from addresses 00H, 05H, 18H to 1FH, 30H to
37H, and 38H to 3FH of the EEPROM memory,
respectively. The decimal point is placed according to the
content of the “L1DEC” parameter.
GROUP
FUNCTION
PIN
SWITCHES
ALD523D
© © © © 2001 Advanced Linear Devices, Inc., 415 Tasman Drive, Sunnyvale, California 94089-1706, Tel: [phone], Fax: [phone]
SEL0
19
0
1
0
1
12/01
SEL1
20
0
0
1
1
DISPLAY SET
Table 3. Display setting switch configurations and operations
DGS0
DGS1
DGS2
DGS3
UNIT
UNT1
UNT1
UNT2
UNT3
http://www.aldinc.com
DISPLAY SETTING
MULTIPLIER
±CAL1
±CAL1
±CAL2
±CAL3
When SEL0=0 and SEL1=1, the ALD523D selects
display set “DGS2”, which consists of a combination of
“M2”, “L2DEC”, “UNT2”, “+CAL2” and “−CAL2”
parameters from addresses 01H, 06H, 20H to 27H, 40H to
47H, and 48H to 4FH of the EEPROM memory,
respectively. The decimal point is placed according to the
content of the “L2DEC” parameter.
When SEL0=1 and SEL1=1, the ALD523D selects
display set “DGS3”, which consists of a combination of
“M3”, “L3DEC”, “UNT3”, “+CAL3” and “−CAL3”
parameters from addresses 01H, 07H, 28H to 2FH, 50H to
57H, and 58H to 5FH of the EEPROM memory,
respectively. The decimal point is placed according to the
content of the “L3DEC” parameter.
Each of the “M1”, “M2”, and “M3” parameters is a 4-bit
hexadecimal number located on the first line of the .CDS
file (see Table 1 of the ALD523D Setup and Calibration
Software User Guide for the data sheet layout). Each of
these “M1”, “M2”, and “M3” parameters can have content
data of “A”, “B”, “C” or “D” which corresponds to mode-
A, mode-B, mode-C default mode, or mode-C clock and
sign bit inverted polarity mode, respectively.
Each of the “L1DEC”, “L2DEC”, and “L3DEC”
parameters is an 8-bit hexadecimal number at addresses
05H, 06H, and 07H of the first line location of the .CDS
file, respectively.
J1
OPERATION
DECIMAL
J2/NoDec
L1DEC
L2DEC
L3DEC
.
MODE SELECTION
M1
M1
M2
M3
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