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UPGRADING FROM ST625X/6XB TO ST625X/6XC

2 DEVELOPMENT TOOLS

The information given in this section applies only to ST development tools. For information on

Third Party tools, please contact your supplier.

2.1 STARTER KIT

Some communication problems have been encountered when programming ST625X/6XC de-

vices with the old ST626X starter kit (MB080 board). If, during the programming phase, the

message “Cannot communicate with the device" is displayed, first check the parallel cable and

jumper settings. If everything is correct, we then recommend to replace the U2 chip

(74HC125) by a 74LS125 which has better thresholds.

To program ST625X/6XC devices we also advise to use the latest version of the ST626X

starter kit (MB196 board) (which can be easily distinguished from the old one as it has 2

sockets for programming DIP16/20/28 devices). The order code of the new starter kit is

ST626XC-KIT.

2.2 HDS2 EMULATOR SERIES

The ST626X-EMU2 emulator can be used to emulate ST625X/6XC devices without any mod-

ification. However, new features such as the LVD, OSG, LFAO are only emulated on the new

ST62GP-EMU2 emulator.

2.3 EPROM PROGRAMMING BOARD

In order to program ST625X/6XC devices, the ST62E6XB EPROM Programming Board

firmware has been updated. The revision level is identified by a sticker on the main IC on the

board. The marking must be 310-32 or higher.

If the board has an earlier revision level, contact your local distributor or ST sales office to

order an upgrade or a new EPB (Order code ST626XC-EPB).

2.4 GANG PROGRAMMER

Like the EPB, the firmware of the gang programmer has been updated. The marking on the

chip must be at least 623-30.

If the programmer has an earlier revision level, contact your local distributor or ST sales office

to order an upgrade or a new Gang Programmer.