COM90C66 Datasheet, PDF (39/76 Pages) SMSC Corporation – ARCNET Controller/Transceiver with AT Interface and On-Chip RAM

D0-D15
Data Register
I/O Address ODH
I/O Address 0CH Memory
Data Bus
High
Low
16
Address Pointer Register
I/O Address 0FH I/O Address 0EH
High
Low
1K x 16
RAM
11-Bit Counter
Memory
Address Bus
11
FIGURE 11 - SEQUENTIAL I/O MAPPED MEMORY ACCESS OPERATION
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