Datasheet

USB-SERIAL
INTERFACE
POWER
SUPPLY
LOAD CELL
CONNECTORS
INPUT
FILTERING
MSP430F449
USB CONNECTOR
LCD SWITCHES
ADS1x31
+5V
+3.3V
CH1
SPI
GPIO
UART
Hardware www.ti.com
5.2.4 S—Start Streaming
When S is issued, the ADS1x31REF begins printing raw output codes from the installed ADS device in
hexadecimal format, separated by new lines. The device iterates continuously until a character is received
from the serial port.
S is used primarily by the EVM software for data collection.
5.2.5 D—Collect One Sample
Issuing the D command causes the ADS1x31REF to report the latest collected sample from the installed
ADS device. The sample is displayed in raw hexadecimal.
5.2.6 C—Set Channel
This command has no effect on the installed ADS device because there is only one channel.
• C0—set to channel 0
• C—(with no arguments) prints the current channel, always CHAN=0
5.2.7 Q—Query Parameters
Q causes the ADS1x31REF to issue a coded string summarizing the current settings. The format of the
string is:
P0R[F,S]OIC0
followed by a carriage-return and linefeed.
6 Hardware
A block diagram of the ADS1x31REF is shown in Figure 8. The schematic and layout drawings are given
in Appendix A.
Figure 8. ADS1x31REF Hardware Block Diagram
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ADS1131REF and ADS1231REF SBAU175A–July 2010–Revised August 2011
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