UPSD 3234A IAP

robin_tang · ‎2005-05-13

Posted on May 13, 2005 at 14:43

UPSD 3234A IAP

robin_tang · ‎2011-05-17

Posted on May 17, 2011 at 12:06

Hi,

I am working an IAP application for the UPSD3234A. The most of firmware code were based on DK3200 IAP example and I only changed a little bits to disable memory reading founction. The IAP application works well in the most of the time. But something it fails to write data into main flash in the range from 0xFF00 to 0xFFFF.

Project info: UPSD 3234A 40MHz

Main flash: 0x8000 - 0xFFFF

Boot flash: 0x2000 - 0x3FFF

Does anyone has similar experience ? Thanks in advance.

robin_tang · ‎2011-05-17

Posted on May 17, 2011 at 12:06

Thanks so much !

I guess it may be due to the hardware issue. The SRAM is in 0x0000 - 0x1FFF. DDCRAM is closed when IAP is doing flash programming.

I tested several chips and found one out of ten may failed to program the main flash in 0xFF00 to 0xFFFF. However, I will check the FLASH code again. If you have any idea, please kindly advise. Thanks again.