Evaluate: MAX1246/MAX1247
MAX1246/MAX1247 Evaluation Systems
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Table 4. Command-Line Options
when Starting Software
Table 3. Command Reference
KEY FUNCTION
0, 1, 2, 3
P
Power-up delay. Timing is approximate and should be verified with an oscilloscope. When using an external refer-
ence, power-up delay is not necessary and should be set to zero. Power-up delay is used regardless of which
power-cycling mode is selected.
Enables or disables the corresponding input channel 0, 1, 2, or 3. The EV kit software scans all enabled channels.
O
Oscilloscope demo. Samples are collected and discarded as fast as possible. Observe waveforms and timing with
an oscilloscope.
F3
L
Enables or disables data logging. If the -L command-line option was not specified, the L command prompts for a
log-file name.
Writes a marker into the data-log file.
D
Delay between samples. Delays longer than one second are handled by the IBM PC; otherwise, the µC module
handles the delay. Timing is approximate and should be verified with an oscilloscope.
F4 Measures the value of a user-applied COM voltage.
F5 Changes the assumed value of VREF.
C Displays the conversion results in decimal form.
F6
S
Samples one of the four inputs at high speed. The sampling rate is controlled by the P and D delays. Due to pro-
gram overhead, the O and S commands operate at different rates. Timing should be verified with an oscilloscope.
Changes the assumed voltage at COM. Selecting G connects the COM pin to ground; selecting E connects the
COM pin to the EXTCOM input pad.
V Displays the conversion results in volts.
F7 Internal clock mode
F8 External clock mode
F1
Selects input scale (unipolar, bipolar, unipolar differential, bipolar differential) for all enabled channels. Disabled
channels are unaffected.
ALT+T Switches back to terminal mode.
ALT+X Exits to DOS.
Selects power-down mode.
COMMAND FUNCTION
COM
vvv
2 Defaults to COM2 PC serial port.
Specifies the voltage at the COM pin.
MONO
For use with monochrome or LCD
display.
?
FASTPD
Enables the fast power-down mode
for the MAX1246.
Lists command-line options.
VREF
vvv
Specifies the actual measured volt-
age at the VREF pin (nominally 2.5V).
-L
filename
Opens file
filename
for data logging
and enables the data-logging
commands.
⇑, ⇓
1 Defaults to COM1 PC serial port.
