COM20019 Datasheet, PDF (15/81 Pages) SMSC Corporation – Low Cost ARCNET (ANSI 878.1) Controller with 2K x 8 On-Board RAM

XTAL1
XTAL2
D0-D7
A0
A1
A2
A7
nRES
nIOS
R/nW
nIRQ1
6801
COM20019
D0-D7
A0/nMUX
A1
A2/BALE
nCS
nRESET
nRD/nDS
nWR/nDIR
nINTR
XTAL1
RXIN
TXEN
nPULSE1
nPULSE2
GND
75176B or
Equiv.
XTAL2
Differential Driver
Configuration
* Media Interface
may be replaced
with Figure A or B.
27 pF
20MHz
XTAL
27 pF
FIGURE 3 - NON-MULTIPLEXED, 6801-LIKE BUS INTERFACE WITH RS-485 INTERFACE
15
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