This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

AM335x的gpmc_a0脚不能输出正确信号

Other Parts Discussed in Thread: AM3354

AM3354通过片选cs3与FPGA通信,12位地址线gpmc_a0 ~ gpmc_a11,8位数据线gpmc_ad0 ~ gpmc_ad7,使用8位非复用模式。测试中发现发读写命令时,实际使用的地址为a1 ~ a11,即比如读地址7时,a1 ~ a3为高电平,而a0却是在高电平下一个低脉冲。且无读写时a0一直保持高电平,在读写时一个脉冲。在16位非复用用模式下a0无变化。求ti专家解答。

7个配置寄存器值如下 

cfg1: 0x28600000
cfg2: 0x00011001
cfg3: 0x00020201
cfg4: 0x08031003
cfg5: 0x000f1111
cfg6: 0x0f030080
cfg7: 0x00000c4c