Digi NS9210 - Manual (Page 27)

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C h i p s e l e c t s
The module has eight chip selects: four for dynamic memory and four for static
memory. Each chip select has a 256MB range.
Chip select
memory map
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S D R A M b a n k s
The module provides connection to 1 SDRAM chip, connected to CS1# (SDM_CS0#).
The other SDRAM chip selects are not used.
The standard module has one of these SDRAM onboard: 1Mx16x4-banks. A13 is the
highest address connected. BA0 and BA1 are connected to A21 and A22,
respectively.
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M u l t i p l e x e d G P I O p i n s
The 64 GPIOs pins available on the module connector are multiplexed with other
functions like:
Name CPU
Sig.
name Pin Address range Size
[Mb] Usage Comments
SDM_CS0# CS1# D6 0x00000000–
0x0FFFFFFF 256 SDRAM bank 0 First bank on module
SDM_CS1# CS3# B5 0x10000000–
0x1FFFFFFF 256 not used
SDM_CS2# CS5# A4 0x20000000–
0x2FFFFFFF 256 not used
SDM_CS3# CS7# B4 0x30000000–
0x3FFFFFFF 256 not used
EXT_CS0# CS0# C6 0x40000000–
0x4FFFFFFF 256 external, CS0#
INT_CS1# CS2# B6 0x50000000–
0x5FFFFFFFF 256 NOR-Flash Program memory on
module
EXT_CS2# CS4# C5 0x60000000–
0x6FFFFFFFF 256 external, CS2#
INT_CS3# CS6# A3 0x70000000–
0x7FFFFFFF 256 internal, CS3# Reserved for internal usage