Texas Instruments TRS3122EEVM, User Manual

Page: 4 / 10

www.ti.com
4 SLCU001 – May 2016
Submit Documentation Feedback
Copyright © 2016, Texas Instruments Incorporated
TRS3122EEVM User's Guide
Driver Function Table
INPUTS OUTPUT
DRIVER STATUS
DIN FORCEON FORCEOFF
TIME ELAPSED SINCE LAST
RIN OR DIN TRANSITION
DOUT
X X L X Hi-Z Powered off
L H H X H
Normal operation with auto-
powerdown plus enabled
H H H X L
L L H <30s H
Normal operation with auto-
powerdown plus enabled
H L H <30s L
L L H >30s Hi-Z
Powered off by auto-
powerdown plus feature
H L H >30s Hi-Z
Receiver Function Table
INPUTS OUTPUT
RECEIVER STATUS
RIN FORCEOFF FORCEON
TIME ELAPSED SINCE LAST
RIN OR DIN TRANSITION
ROUT
X L X X Hi-Z Powered off
L H X X H
Normal Operation with auto-
powerdown plus
disabled/enabled
H H X X L
Open H X X H
• Pin 8 connects to the VL pin, which is the logic level supply to which all logic inputs and outputs are
referenced.
• Pin 9 is connected to VCC, the supply voltage for the device's charge pump.
• Pin 10 is connected to GND.
Board Test Points
EVM top view image
The TRS3122EEVM provides test points for all RS-232 (TX1, RTS1, RX1, CTS1) and logic (TX2, RTS2,
RX2, CTS2) communication lines in addition to a ground test point.