W3100A Datasheet, PDF (23/63 Pages) List of Unclassifed Manufacturers – i2Chip W3100A

Internal Memory and Registers
W3100A Top level Memory Map
WŸWWWWG
WŸWYWWG
WŸ[WWWG
Control registers
Not used
Tx data buffer
WŸ]WWWG
Rx data buffer
WŸ_WWWG
W3100A internal register and memory are comprised of 512 byte Control Registers and 16KB data buffer as
displayed in the diagram above.
-
0x0000 ~ 0x00FF: Space for Control Registers
-
0x0100 ~ 0x01FF: Space for Shadow Registers
-
0x0200 ~ 0x3FFF: Not used (This space can be used by other devices)
-
0x4000 ~ 0x5FFF: Tx Data Buffer
-
0x6000 ~ 0x7FFF: Rx Data Buffer
Tx data buffer is the memory used for MCU transmission, and MCU can execute ‘write’ but cannot execute
‘read’. Rx data buffer is the memory used for MCU reception, and MCU can execute ‘read’ but cannot
oˆ™‹ž™Œ‹Gp•›Œ™•Œ›Gj–••ŒŠ›› G~¡ˆ™‹GO~p•Œ›SGp•ŠUPG
YZ