User Manual

MHX-920 Operating Manual: Chapter 2 Electrical/Physical 5
Table 1 (continued)
GND 11-17
Ground reference for logic, radio and I/O pins.
\Reset 10
Active low reset input to the module. See
Section 2.4 for timing information.
I
RSSI1 29
Receive Signal Strength Indicator 1. This
output is the first of the three RSSI indicators
to become active high as the signal strength
increases. See Section 2.2 for details
O
RSSI2 30
Receive Signal Strength Indicator 2. This
output is the second RSSI indicator to become
active high as the signal strength increases.
See Section 2.2 for details.
O
RSSI3 31
Receive Signal Strength Indicator 3. This
output is the last RSSI indicator to become
active high as the signal strength increases.
See Section 2.2 for details.
O
RTS 27
RS-232 Request to Send. Active low (TTL
level) input.
I
RxD 22
RS-232 Receive Data. TTL level output.
O
RX/SYNC 33
Active high output indicates receive and
synchronization status. See Section 2.2.
O
TxD 23
RS-232 Transmit Data. TTL level input.
I
TXMODE 32
Active high output indicates module is
transmitting data over the RF channel. See
Section 2.2.
O