Read/write MB90F456 MCU with oramge 5 programmer

[Gennaro081]

Hello guys, I need help please... I'd like read Fujitsu MB90F456 MCU, I bought orange 5 programmer, But I don't have the correct adapter.. i can steel using cables, but to be onest, the software doesn't say were to connect pins...

I managed to connect TX, RX, VCC, RST, GND, but don't know were to connect other pins on the box. I'm getting MCU not answer error

Can someone can help me or tell me which adaptor can I use please?

[exe123]

Logic 0 = Pin needs to be tied to GND
Logic 1 = Pin needs to be tied to VCC

You need to measure logic level and decide if you need to lift pin

[Gennaro081]

Logic 0 = Pin needs to be tied to GND
Logic 1 = Pin needs to be tied to VCC

You need to measure logic level and decide if you need to lift pin


thank you for the quick answer. how can I understand, if I need or not to lift pin?

Tanks

[exe123]

If you don't have schematic of the target board, you need to measure it if pin is tied to GND or VCC or if it used for different function. If you are unsure, just lift all pins that need logic 0 or logic 1 and connect them to GND or VCC as needed

[Gennaro081]

If you don't have schematic of the target board, you need to measure it if pin is tied to GND or VCC or if it used for different function. If you are unsure, just lift all pins that need logic 0 or logic 1 and connect them to GND or VCC as needed

Something is appening... I have voltage error now..

The tacho is on, connected to 12V motorbike battery

I have MB90f456 datasheet, may it help?

[Gennaro081]

up please any idea?