Chip-Tools

ITDEENBGES

Reading and writing NEC V850ES MCUs with the ZN078 adapter and ABPROG

The ZN078 is the updated version of the old ZN034 flat cable and is used for jobs needing separate RX/TX lines: reading, erasing and writing unlocked V850ES MCUs and direct connection to other modules' PCBs. It's included in the base ZN030 package.

Procedure

1. Locate the V850ES MCU communication points on the board: RX, TX, FLMD0, GND, +5V and Reset.
2. Solder the ZN078 wires respecting the colours stated on the DB25 connector: purple wire RX, blue wire TX, white wire FLMD0, black wire GND, red wire +5V, green wire Reset.
3. If you're building the harness on a male DB25, use the ZN078 pinout: PIN 5 RX (purple), PIN 6 TX (blue), PIN 13 FLMD0 (white), PIN 14 GND (black), PIN 20 +5V (red), PIN 25 Reset (green).
4. Connect the ZN078 to the female DB-25 on the ZN045 and the ZN045 to the DB-15 on the AVDI.
5. Start the ABPROG software and select "MCU", then the entry matching the V850ES MCU.
6. Run the read and save the dump: it's the mandatory backup before any write.
7. If needed run the erase, then load the file to be written and start the programming.
8. Read back and compare the content to confirm the write before refitting the module.
9. Note: many functions for these adapters live in the Upgraded version of the ABProg software.

Reference screenshots