10 Mbps ARCNET (ANSI 878.1) Controller with 2Kx8 On-Chip RAM
Datasheet
COM20022I
XTAL1
XTAL2
D0-D7
D0-D7
A0
A1
A0/nMUX
RXIN
A1
A2/BALE
75176B or
Equiv.
A2
TXEN
nPULSE1
nPULSE2
A7
nCS
nRES
nIOS
R/nW
nIRQ1
nRESET
nRD/nDS
GND
nWR/nDIR
nINTR
Differential Driver
Configuration
6801
* Media Interface
may be replaced
XTAL1
with Figure A, B or C.
XTAL2
27 pF
27 pF
20MHz
XTAL
+5V
HYC9068 or
HYC9088
+
10
uF
0.47
uF
6
RXIN
RXIN
12
11
N/C
nTXEN
0.01 uF
1KV
5.6K
1/2W
5.6K
1/2W
nPULSE1
nPULSE2
GND
nPULSE1
nPULSE2
17, 19,
4, 13, 14
3
Traditional Hybrid
Configuration
0.47
uF
-5V
+
10
uF
*Valid for 2.5 Mbps only.
FIGURE C
Figure 5.2 - Non-Multiplexed, 6801-Like Bus Interface with RS-485 Interface
Revision 09-27-07
Page 18
SMSC COM20022I
DATASHEET
SMSC [ SMSC CORPORATION ]
