COM20020-5 Datasheet, PDF (14/58 Pages) SMSC Corporation – Universal Local Area Network Controller with 2K x 8 On-Board RAM

XTAL1
XTAL2
D0-D7
A0
A1
A2
A7
nRES
nIOS
R/nW
nIRQ1
6801
COM20020-5
D0-D7
A0/nMUX
A1
A2/BALE
nCS
nRESET IN
nRD/nDS
nWR/DIR
nINTR
XTAL1
RXIN
TXEN
nPULSE1
nPULSE2
GND
75ALS176B
or Equiv.
XTAL2
Differential Driver
Configuration
* Media Interface
may be replaced
with Figure A, B or C.
47 pF
40 MHz
1K
47 pF
FIGURE 3 - NON-MULTIPLEXED, 6801-LIKE BUS INTERFACE WITH RS-485
INTERFACE
14