EV8680 datasheet(25/39 Pages) CMLMICRO

25 / 39 page

Evaluation Kit for CMX868

EV8680

UM8680/2

AT Command Summary

The maximum command length is 48 characters, excluding the AT prefix and carriage return.

A user defined escape sequence (usually +++) is required to revert the modem from on-line (data transfer

mode) to the command mode, to allow the user to issue AT commands to the PIC.

Every command except for A/ and the escape sequence must begin with the AT prefix and be entered by

pressing a carriage return.

When the default command echoing and word result codes are enabled the firmware will send a LF

character directly after a CR character to ensure the terminal emulator display is legible.

Commands which are not fully implemented will return the result code ‘NYI’ (Not Yet Implemented).

Do not send AT commands to the Evaluation Kit until the previous result code (if enabled) has been

received.

1.6.4

Software Description

1.6.4.1 In-Circuit Programming of PIC16LC76

TO ENTER PROGRAMMING MODE

a) Remove power from board.

b) Insert a blank PIC16LC76-04/SP (OTP)

µC device into the U4 IC socket.

c) Using a 2-way jumper connect MODEA (J3:3) to MODEB (J3:4).

d) Re-apply power to board. (VDD = 5.0V).

e) Connect the programming voltage (12.5V to 13.5V) power supply between VPP, J3:15 (+ve) and

VSS (-ve).

f) Ensure the PIC µC programming utility PICPROGB.EXE is loaded into the PC under DOS and the

PC is connected to the evaluation kit.

g) Reset the EV8680 board by momentarily pressing switch SW1.

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.

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

status information. The bottom window contains prompting and progress information plus user input.

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

communications port to which the EV8680 board is connected, and then, which device is to be

programmed.

For the EV8680 board select option 2, PIC16C77. Once the user has entered this

information, 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.

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