I am using MCU MC9S12G series. The controller is already mounted on a PCB.
I am using a jig to flash the MCU using PEs USB BDM Multilink (6 pin).
The controller is part of a pre-aged component.
The actual working voltage of the whole pcb is 24v.
The regulator supplies the MCU with 5V.
The voltages at the jig and BDM Multilink interfaces are Vdd = 5V
Reset = 5V
BGND = 5V
I am using code warrior for loading the code. The error obtained is
Hi-WAVE Communication to the target has failed
(target MCU has no clock or wrong BDM clock speed is used or derivative is secured!)
I have set the clock.
CLKDIV: [entered value here |default 73]
When i try to unsecure the MCU using the unsecure command in code warrior i get the following message :
"Derivative could NOT be unsecured"
I am unable to flash the code.
Another team has used the same jig to flash the code on to a 12v version of the pcb having same MCU, successfully.
Can the input voltage of the jig have any effect on flashing if i am getting 5v to the mcu?