User's Manual

29
RS232 EIA Serial Port Cable Information
The RS232 EIA Serial Port cable contains 25 pins through which the terminal or PC can
communicate to the MDK2001. The following table will describe the connections.
Pin # Name Direction Description
1 CHG - Chassis Ground
2 TXD TM Transmit Data
3 RXD FM Receive Data
4 RTS TM Request to Send
5 CTS FM Clear to Send
6 DSR/LIP FM Data Set Ready
7 GND - Signal Ground
8 DCD/MI FM Carrier Detect
20 DTR TM Data Terminal Ready
TM = To Module FM = From Module
Uploading New WHM900 Code
Equipment List:
1 MDK2001 WHM900 Development Board with power supply
1 WHM900 RF Module to be updated
1 Window 95, 98, or NT PC with parallel port
1 Copy WHM900 Hex File Code Disk
1 Copy of Flash Programmer Installation Disk
Setup Instructions:
1 - Carefully Unpack the MK2001 and Power Supply.
2 - Lineup the pins marked CN1 on the WHM900 with the header marked CN1
on the MDK2001 and carefully insert the RF module into the Development
Board. Pin 18 is keyed to prevent improper installation.
3 - The MDK2001 has two 2 pin headers with black mini jumpers attached to
them. These headers are marked JP20 and JP21. To program new code; make sure
that the mini jumpers are installed to cover the two pins. When the code upload is
finished always return the jumpers to the half on and half off position. This will
disable the parallel programming port and allow normal serial communication to
occur via the 25 RS232 connector located on the rear of the MDK2001.