If you haven't tried Unsecure_12 tool from P&E, then you should download it from www.pemicro.com. If it doesn't help, then chances are your MCU or multilink got damaged. You could check if you see some activity on BKGD and /RESET pins when trying to unsecure.
Thank you very much for your help.
I installed the Unsecure_12 tool with
Interface: USB HC08/HC!2 Multilink -USB Port
Port: USB!: USB ML -12 MCUSLK (pemicro -shared)
Oscillator frequency: 4 Mhz
On pressing Unsecure it gave me the following message:
Interface Cable Detected
Searching for Interface Speed .............
ERROR - Communication with target.
Appropriate interface speed not found.
So it was not unsecured
I checked BKGD and /RESET pin both on Multilink & on MCU and it showed activity on Oscilloscpe (in the form of Jitters)
The chip is warming up, but appropirate voltage (5v) is powering the MCU.
Can you guide us further action? We were thinking of using Flash Programmer to unsecure it.
We have AVR & PIC flash programmer avialable and we are not sure if it is compatible with this kit.
If these flash programmer can be use, can you guide us with the procedure and connection to be made to use the flash to program the smart car.
Thanks once again.
Chip should be cold. Probably it is damaged.
What is "in the form of jitters"? Do you see clean 0 <-> 5V transitions? Falling edges should be clean and sharp. Rising edges on BKGD may be little round, but it should not oscilate at some middle level, alvays full 5<->0V hi to lo or lo to high transitions.
Try checking voltages on VDD1, VDD2 and VDDPLL pins. They must be not 5V, but about 2.5.