Evaluation Kit for CMX602B

EV6021

 2000 Consumer Microcircuits Limited

24

UM6021/4

1.6.4.1

In-circuit re-programming of PIC16C74A

In order that the PIC16C74A

µController may be re-programmed the existing program must be

erased by placing the device in a uv- eraser for approximately 15 minutes.

TO ENTER PROGRAMMING MODE

(a) Remove power from board

(b) Set switch, SW6, to ‘PROG’

(c)

Re-apply power to board

(d) Connect the programming voltage (VPP = 12.5V to 13.5V) power supply between test point

TP16 (+ve) and VSS (-ve)

(e) Ensure the PIC

µC programming utility PICPROGA.EXE is loaded into the PC under DOS and

the PC is connected to the evaluation kit

(f)

Reset the EV6021 board by momentarily pressing switch, SW5

USING THE SOFTWARE

This is supplied on disk as a self-documented executable file PICPROGA.EXE for a PC running

DOS (either directly or as a DOS window in Windows 3.11 or '95). It is not recommended for use on

Windows NT systems. Please note that this programming software does not meet the Arizona

Microchip Technology verification requirements for a "production quality" programmer. Also, it does

not support the programming of ID locations and there is no checksum facility.

The user interface consists of two windows. The top window contains the operating instructions and

the bottom window shows the command line and data communications with the PIC

µC. When the

top window first appears the user will be prompted to enter the number of the serial communications

port to which the EV6021 board is connected. Once the user has entered this number, the following

commands are displayed:

press F

to load file

press C

to enter Configuration Word.

Currently - xxxx

press B

to check target device is blank.

press P

to program target device.

press V

to verify target device.

press R

to read target device.

press A

to view contents of program data array.

press Esc

to return to DOS.

A new function from the above table can be selected whenever the >ok prompt appears in the

bottom window.

Notes:

a)

Assembler output files must be in the Intel hex format (.HEX) in order to be usable by this

programming software.

b)

The PIC

µC supplied has a Configuration Word which is preset 3FB1H. This selects the crystal

oscillator, disables the watch dog timer, enables the power up timer and disables code

protection. The programming software currently defaults to 3FB1H. Consult Arizona

Microchip Technology for more information on the Configuration Word.