5–14
5.12.4
Logic Mode (CF = 1)
In this configuration, the received code is at logic level. The analog amplifier and comparator connected
internally to IN is bypassed. This is typically the configuration used when the transmitter and receiver are
connected together by a hard line.
5.12.5
Noninverting Mode (CI = 0) or Inverting Mode (CI = 1)
The code input to IN is not inverted before passing to the logic circuitry. The following considerations must
be taken to determine if a noninverting or inverting receiver should be used:
•
Transmitting from OUT on the transmitter is considered inverted.
•
Transmitting from IN on the transmitter is considered noninverted.
•
Using the logic mode on the receiver (CF = 1) does not invert the signal.
•
Using the analog mode on the receiver (CF = 0) does invert the signal.
•
Determine whether the signal path between the transmitter and receiver inverts the signal.
The code input to IN is internally inverted before passing to the logic circuitry.
NOTE:
Do not use the TMS3637 in the log inverting modes CA = 0, CC = 0, CF = 0, or
CI = 1. The amplifier sensitivity is degraded in these modes.
Summary of Contents for TMS3637P
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