JTAG ARM7tdmi ? please help

[CornholioGSM]

Hello,
please help. I am absolutely newbie in jtag.
I have device with Philips/NXP BGB203 IC.
Device is connected to oled display that is burned and is not possible to buy new one. So i have found solution how to connect another display...problem is that display is bad initialized (picture attached).
Soo i need to jtag read ic, edit and then write it back.
Ic is based on ARM7tdmi.

Can anyone tell me what i need for it? I have Altera USB blaster but i dont know if is it usable

EDIT: original oled have driver SSD1300...new have SSD1306/7

Thank you for help or any idea

Tomas

[stj]

Re: JTAG ARM7tdmi ? please help

get a datasheet for the chip and see what modes of debug/programming it supports.
i know the ST branded arm stuff uses a serial jtag or a standard serial port.

what's it from? if it's comercial then it may be protected.

[CornholioGSM]

Re: JTAG ARM7tdmi ? please help

in datasheet is only ..."JTAG for ICE and flash memory programming" and then jtag pinouts.

it's an old sony ericsson bluetooth watch

[stj]

Re: JTAG ARM7tdmi ? please help

you need the full datasheet, not that thing,
but i doubt you can read the code.
i also doubt you will find what you need given it's made by NXP(philips)

do you know how to hack machine-code software?
just asking.

[CornholioGSM]

Re: JTAG ARM7tdmi ? please help

Sooo maybe jtag is not needed.
I have found some datasheets of devices with same ic...and bgb203 can be programmed via rs232 with AT commands.So i will test it