Technical data

USING THE UNIVERSAL DEVELOPER'S KIT

LZT 123 8020 R1A

Hence the module determines the state of the signal at the

System Connector Header. Refer to the appropriate Integrator's

Manual for a description of the signals.

12.3 Serial interface

The external host communicates with the module/radio device

through J501, which is a standard RS-232 9-pin interface (see

below). The straight-through serial cable provided connects

from J501 (DB-9 Female) to the serial port of a PC (DB-9 or

DB-25 Female).

Pin RS-232 Description

1 DCD Data Carrier Detect

2 TXD Transmission Data

3 RXD Receiver Data

4 DTR Data Terminal Ready

5 GND Ground

6 DSR Data Set Ready

7 RTS Request to Send

8 CTS Clear to Send

9 RI Ring Indicator

Table 7: RS-232 DB9 Pin-out

The primary connector, J501, routes all the signals to the

module interface, while level shifting the appropriate ones. The

secondary connector, J502, does not route all of the signals to

the module. The following table details the signal routing from

J502.

Pin RS-232 Routing

1 DCD Not Connected

2 TXD to X502, Routes to CFMS (System Connector Pin 39) or TD3

3 RXD to X501, Routes to CTMS (System Connector Pin 37) or RD3

4 DTR Not Connected

5 GND Ground

6 DSR Not Connected

7 RTS to J502 Pin 8 (CTS) through a 0 Ohm Resistor (R535)

8 CTS

to J502 Pin 7 (RTS) through a 0 Ohm Resistor (R535) and

N502 Pin 17 through a 0 Ohm Resistor (R536)

9 RI Not Connected

Table 8: RS-232 DB9 J502 Routing

Hardware Flow Control Mechanism is provided via the signals

CTS, DTR and RTS. Flow control is used for CSD applications.