COM20020I Datasheet, PDF (19/72 Pages) SMSC Corporation – 5Mbps ARCNET (ANSI 878.1) Controller with 2K x 8 On-Chip RAM

5Mbps ARCNET (ANSI 878.1) Controller with 2K x 8 On-Chip RAM
Datasheet
XTAL1
XTAL2
D0-D7
A0
A1
A2
A7
nRES
nIOS
R/nW
nIRQ1
6801
COM20020ID
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, B or C.
27 pF
20MHz
XTAL
27 pF
RXIN
HYC9068 or
HYC9088
RXIN
+5V
10 +
0.47
uF
uF
6
nTXEN N/C
nPULSE1
nPULSE2
GND
nPULSE1
nPULSE2
17, 19,
4, 13, 14
0.47
uF
12
11
5.6K
1/2W
5.6K
1/2W
0.01 uF
1KV
3
-5V
+ ₁₀
uF
Traditional Hybrid
Configuration
*Valid for 2.5 Mbps only.
FIGURE C
Figure 5.2 – Non-Multiplexed, 6801-Like Bus Interface with RS-485 Interface
SMSC COM20020I Rev D
Page 19
DATASHEET
Revision 12-05-06