LAN91C100 Datasheet, PDF (28/101 Pages) SMSC Corporation – FEAST™ Fast Ethernet Controller

I/O SPACE - BANK 0
OFFSET
NAME
8
MEMORY INFORMATION REGISTER
TYPE
READ ONLY
SYMBOL
MIR
HIGH
BYTE
FREE MEMORY AVAILABLE (IN BYTES * 256 * M)
1
1
1
1
1
1
1
1
LOW
BYTE
MEMORY SIZE (IN BYTES * 256 * M)
1
1
1
1
1
1
1
1
FREE MEMORY AVAILABLE This register can
be read at any time to determine the amount of
free memory. The register defaults to the
MEMORY SIZE upon reset or upon the RESET
MMU command.
MEMORY SIZE - This register can be read to
determine the total memory size.
All memory-related information is represented in
256 * M byte units, where the multiplier M is
determined by the MCR upper byte.
These registers default to FFh, which should be
interpreted as 256.
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