User's Manual

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.



Table 32 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.

Figure 17 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

Number

Input/

Output



Pin Description

1 — Eyelet H11, Evaluation PCB

2OUTRXD (Received Data)—

Supplies received data to the connected device.

3INTXD (Transmitted Data)—

Accepts TX data from the connected device.

4 — Eyelet H13, Evaluation PCB

5INSignal 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)

8OUTCTS (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