COM20020D Datasheet, PDF (37/72 Pages) SMSC Corporation – ULANC Revision D Universal Local Area Network Controller with 2K x 8 On-Board RAM

D0-D7
Data Register
I/O Address 04H
Memory
Data Bus
8
Address Pointer Register
I/O Address 02H I/O Address 03H
High
Low
11-Bit Counter
Memory
Address Bus
11
2K x 8
INTERNAL
RAM
FIGURE 8 - SEQUENTIAL ACCESS OPERATION
37