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RM57L843: RM57L843

Part Number: RM57L843


Hi

I need to use MibSPI as a normal SPI with SPI Flash. Two questions,

1)- I'm using MibSPI as a normal SPI using only one CS and floating all other CS. Rest of the connections are straightforward like the normal SPI using MOSI, SIMO and Clk with slave device. Please confirm this hardware configuration is enough and nothing special required in H/W to use it in SPI mode.

2)- I consider that it will not impact DMA and I can use DMA mode in the SPI to avoid extra load on CPU. What is maximum length data offer in DMA for an SPI. Please confirm?

Regards;

  • Hello Bari,

    1. This setup is good enough (CS, CLK, SIMO, and SOMI). You can pull-up WP and HOLD of the flash if it has those 2 signals, or you can connect those 2 signals to GIO pins (with external pull-up too).
    2. The SPI data length is 16 bit. So the read size and write size are both 16-bit in the DMA setting.