Other Parts Discussed in Thread: DRA789
The SOC part number is DRA789
NOR FLASH part number: MT25QL01GBBB
QSPI NOR Flash configurations as follows
memory map mode,
QSPI clock is 96MHz,
Read dummy clock cycles = 8,
Fast quad read for 3 Byte address,
read command = 6Bh,
Reading 256 Bytes data from QSPI NOR FLASH (0x602500 ~ 0x602600). There are 122 Bytes data error, always 0xFF.
Below is the waveform of QSPI-NOR flash. The first 128 Bytes data is identical to NOR FLASH, but the second 128 Bytes has error. DQ1 low level should be around 0V, but the waveform shows that it is higher than 1.5V, so the QSPI capture the input data as 0xFF.
CH1: SCLK, CH2: DQ1, CH4: CS