EV6120 Datasheet, PDF (24/28 Pages) CML Microcircuits – For CMX612 Product Evaluation

Evaluation Kit for CMX612
EV6120
1.6.4.2 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. For boards fitted with an
OTP device the user will need a fresh µcontroller.
Note that V_DD must be set to 5.0 Volts for programming.
TO ENTER PROGRAMMING MODE
(a) Ensure the windows application ES6120 is not running.
(b) Connect the programming voltage (VPP = 12.5V to 13.5V) power supply between test point
TP16 (+ve) and VSS (-ve).
(c) Ensure the PIC µC programming utility PICPROGB.EXE is loaded into the PC under DOS and
the PC is connected to the evaluation kit.
(d) Reset the EV6120 board by momentarily pressing switch, SW5
USING THE SOFTWARE - PICPROGB
This is supplied on disk as a self-documented executable file PICPROGB.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.
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 EV6120 board is connected, and then, which device is programmed. For the
EV6120 select option 1, PIC16C74A. Once the user has entered this number, the following
commands may be selected:
press F to load file.
press C to configure device.
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.
© 2000 Consumer Microcircuits Limited
24
UM6120/1