MCCNFG/DOS
Introduction
MCCNFG/DOS is a DOS application that will program the MC145170 chip in the EXP-1.
In these days of Windows why write a DOS application? Mainly because I had an elderly Compaq Contura 386 Notebook in my closet that I new would be usefull for something..... and acting as a programmer for the PLL turned out to be the something.
MCCNFG/DOS gives you full control over the C, R and N registers of the PLL so it should be usable will all MC145170 installations with a little experimentation... particularly in the C values. I suggest you obtain the Motorola MC145170 data sheet for a full description of the options that appear on the MCCNFG/DOS configuration page.
Installing MCCNFG
MCCNFG/DOS accesses the LPT1 port on your PC to program the PLL. The port address is obtained automatically from the PC BIOS. Becauses MCCNFG/DOS accesses the ports directly it will not run under Windows NT but should operate in a DOS Windows of Windows 3.x, Windows 95 or Windows 98.
MCCNFG/DOS has been tested on machine ranging from a with processor speeds ranging from an 80386-20 to Pentium II-366 and in all cases successfully programmed the PLL.
MCCNFG/DOS is supplied as a ZIP file. To install do the following:
Configuring MCCNFG/DOS for your PLL
When MCCNFG/DOS is started you will see a screen similar to:
Press F2 to open the configuration form. You will see a screen similar to:
Configuration options with the recommended values for the EXP-1 are as follows:
Option | EXP-1 | Register | Note |
Phase Detector Output Polarity | 0 | C | Not Inverted |
Phase Detector A/B Selection | 1 | C | Phase Detector B |
Lock Detect Output | 0 | C | Disabled |
REFout Frequency | 0 | C | Static Low |
fVE Output | 0 | C | Disabled |
fR Output | 0 | C | Disabled |
PLL Reference Oscillator Frequency | 10000000 | R | hz |
PLL Tuning Step | 5000 | R | hz |
Display/Programmed Freq Difference | -10000 | hz | |
Minimum Input Frequency | 144000000 | hz | |
Maximum Input Frequency | 148000000 | hz | |
Display LPT Line Status | 1 | Enabled | |
Printer Port DIN Pin | 2 | ||
Printer Port ENB Pin | 3 | ||
Printer Port CLK Pin | 4 |
Notes:
Set the configuration options as accurately as possible and press F9 to close the configuration screen and save the options.
When back at the main screen enter the frequency you want to program into the PLL.
Notes on entering frequencies: