2023-03-10 08:31 AM
I have octospi hyperram memory to use on stm32h7b0 with nor flash I usually use stm32cubemx because it make the life easier but it's my first time configuring memories with it..can anyone help me with that ?
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2023-11-16 03:55 PM - edited 2023-11-16 04:03 PM
For my externa flash memory MX25L12833FMI-10G
Chip Select high time--->in datasheet of external flash memory: look for "deselect time after a non READ command"(tSHSL or tCSH): for my memory it's 30 ns. See picture below.
Example: fclk = 104Mhz = 9.62ns , prescaller = 1, what's the chip select high time?
Chip select high time: 30 ns/1*104Mhz = 3.12-->4.
For my external ram memory APS6408L-3OBM-BA_PSRAM
Chip select high time is : 2
Look at the parameter "tCPH =CE# HIGH between subsequent burst operations = 18 ns" to calculate this.
Example: fclk = 104Mhz = 9.62ns , prescaller = 1, what's the chip select high time?
Chip select high time: 18 ns/1*104Mhz = 1.87-->2.