Keil Target Options Settings for EZ-USB FX2(128pin)

Hi,

Some background information first. With regards to EZ-USB FX2(128pin), I am limited to using external parallel memory to store my program due to requirements. As such, I need to use EA=1 mode (as opposed to using the "normal" EA=0 mode with serial EEPROM).

On my board, I am pulling EZ-USB CS# to PROM CE#, EZ-USB OE# to PROM OE# (the respective address and data lines are connected too). The PROM I am using is AT27LV512A.

When compiling the HEX code, one of the settings I have tried for Target Options is as below but it dosen't seem to work. When plugged into a USB host, it is not able to detect the USB device and only shows up as an unknown device.

Off Chip Code Memory
EPROM start : 0x0000, 0x3D00 size

Off Chip Xdata Memory
RAM start : 0xE000, 0x0200 size
RAM start : 0xE400, 0x1C00 size

Anyone has any clue whether the settings are correct? Or is there some other implementation that I have to make?

Rgds

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