COM20022I-3.3V Datasheet, PDF (18/73 Pages) SMSC Corporation – 10 Mbps ARCNET (ANSI 878.1) Controller with 2Kx8 On-Chip RAM

10 Mbps ARCNET (ANSI 878.1) Controller with 2Kx8 On-Chip RAM
Datasheet
XTAL1
XTAL2
D0-D7
A0
A1
A2
A7
nRES
nIOS
R/nW
nIRQ1
6801
COM20022
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
+5V
HYC9068 or
HYC9088
10 +
uF
0.47
uF
RXIN
6
nTXEN N/C
nPULSE1
nPULSE2
GND
nPULSE1
nPULSE2
17, 19,
4, 13, 14
12
11
3
0.47
uF
-5V
+ ₁₀
uF
FIGURE C
5.6K
1/2W
5.6K
1/2W
0.01 uF
1KV
Traditional Hybrid
Configuration
*Valid for 2.5 Mbps only.
Figure 5.2 - Non-Multiplexed, 6801-Like Bus Interface with RS-485 Interface
Revision 03-08-07
Page 18
DATASHEET
SMSC COM20022I 3.3V Rev.C