I follow information on Connection documents for E1/E20 and V850 family.
The connection as shown in 2 pictures below.
The problem I have now is I get error message "No response from Target Microcontroller (FLMD)The MCU is on a board but not my design and it is an ECU.The board can be self-powered either from the system or external. I am using external 5.0VPlease advise me.
Have you checked this thread if the response from Scott helps you: http://renesasrulz.com/other_products/v850/f/v850---forum/10440/using-e1-to-read-write-mcu-flash
JBRenesasRulz Forum Moderator
Sorry, I don't have this device so I can't even try this. Scott's response on that thread that I've linked talks about if there's a circuit in your target board which makes the device unable to be read or programmed. Are there other components attached on the pins that you've used for reading or programming? If not, maybe the issue is with the clock settings also that you're suspecting. Please check the hardware manual too.
I was able to configure RFP v2.05.03 to use 6MHz osc with multiplier of 8:
I don't have this exact device but I have no problem with uPD70F3580 using the E1 with RFPv2.