Datasheet

Revision 12-05-06 Page 4 SMSC COM20020I Rev D
PRODUCT PREVIEW
Block Diagram
Figure 1 - COM20020ID Internal Block Diagram
MICRO-
SEQUENCER
AND
WORKING
REGISTERS
STATUS/
COMMAND
REGISTER
RESET
LOGIC
RECONFIGURATION
TIMER
NODE ID
LOGIC
OSCILLATOR
TX/RX
LOGIC
ADDITIONAL
REGISTERS
ADDRESS
DECODING
CIRCUITRY
2K x 8
AD0-AD2,
BUS
ARBITRATION
CIRCUITRY
nPULSE1
nPULSE2
nTXEN
nINTR
nRESET
RAM
A
0
/
n
M
U
X
A
1
A
2
/
B
A
L
E
nRD/nDS
nWR/DIR
nCS
D3-D7
RXIN
XTAL1
XTAL2