CS8900 and SMDK2410 board

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1 total messages Started by geeko Mon, 30 Sep 2002 06:13

#171

Author: geeko
Date: Mon, 30 Sep 2002 06:13

23 lines
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Hi
    I am using  SMDK2410 board which is built around an ARM920 core.My board
has a CS8900A as the ethernet interface
Currently i am devloping a driver for CS8900A and facing some problems.
CS 8900A has a register called IO_BASE it is a16bit register to which i have
to write the IO_BASE address of the CS8900A my processor is a 32 bit
processor and all the address are 32 bit then how can i configure the
IO_BASE register.
Also another register called MEMORY_BASE is also causing problems it is
readwrite only for lower 20bits and i have to write a32 bit memory base
address into it.

    In my board the chip is mapped into the fourth memory bank of the ARM
by connecting the nGCS3 to CS of CS8900A
The I/O or Memory mode is selected by using the A24 line

            There are two modes for acessing the CS8900A I/O mode and MEMORY
mode the chip is in I/O mode by default
 at a reset.How can i acess the chip after a reset and write values into the
registers so that we can configure the chip


Any comments plz

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