78
TransNET OEM Integration Guide
05-3946A01, Rev. C
NOTE: Radio modules equipped with a payload TTL interface are presented as
RS-232 mode from the Evaluation Board.
lists the
DATA
connector pin functions for an RS/EIA-232 signaling
interface.
NOTE:
The radio is hard-wired as a DCE in the EIA-232 mode.
Unterminated Pins
Four pins of the DB-9
DATA
Interface connector, J5, on the Evaluation PCB
are available for custom connections.
shows the location of eyelets connected to the Evaluation PCB’s
DATA interface connector, J5. These pins are provided for low-current and
low-voltage connections.
Figure 23. DATA Connector (DB-9F), J5
As viewed from outside the device
Table 32. DATA Connector, J5, Pin Descriptions—RS/EIA-232
Pin
Number
Input/
Output
Pin Description
1
—
Eyelet H11, Evaluation PCB
2
OUT
RXD (Received Data)
—
Supplies received data to the connected device.
3
IN
TXD (Transmitted Data)
—
Accepts TX data from the connected device.
4
—
Eyelet H13, Evaluation PCB
5
IN
Signal Ground
—Connects to ground (negative supply potential)
on the radio’s PC board and chassis.
6
—
Eyelet H12, Evaluation PCB
7
IN
RTS (Request-to-Send)
8
OUT
CTS (Clear-to-Send)
—Goes “high” after the programmed CTS
delay time has elapsed (DCE), or keys an attached radio when RF
data arrives (CTS KEY).
9
—
Eyelet H14, Evaluation PCB
5
9
6
1
