Hi, My customer are having a problem with AM335x GPMC. On their customer board, FPGA are connected to GPMC CS3( 8-bit Non-Multiplex mode ). The GPMC register configurations are as follow: ******************************************************** GPMC_SYSCONFIG = 0x00000008 GPMC_CONFIG = 0x00000010 GPMC_IRQENABLE = 0x00000000 GPMC_CONFIG1_3 = 0x00450000 GPMC_CONFIG2_3 = 0x000C0C00 GPMC_CONFIG3_3 = 0x00000000 GPMC_CONFIG4_3 = 0x08050B04 GPMC_CONFIG5_3 = 0x000A0C0C GPMC_CONFIG6_3 = 0x00000000 GPMC_CONFIG7_3 = 0x00000F41 (CS3 are enabled after all GPMC register settings are done) ********************************************************* GPMC CS3 are mapped to 0x0100_0000 - 0x01FF_FFFF(16MB). They are having following problem at single write access. 1. First they write 0xFF value to 0x01001000 address. Write access are done succcessfully. 2. Then they write 0xFF value to 0x01000000 address. But it can't write to 0x01000000 address. Because GPMC_A12 was still '1(High)', it didn't change to '0(Low)' at access time. So, it is accessing to 0x01000000 address which is not expected address. 3. Just after above step2, they tried writing 0xFF value to 0x01000000 address again. GPMC_A12 got changed to '0' and the write access was done successfully. They tried accessing to other address, but other GPMC_ADDRESS bit will change as expected. This problem always occur when doing step1 and step2. Can you please give us an advise for this issue? best regards, g.f.
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