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COM20020 データシートの表示(PDF) - SMSC -> Microchip
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COM20020
COM20020 3.3V ULANC Universal Local Area Network Controller with 2K x 8 On-Board RAM
SMSC -> Microchip
COM20020 Datasheet PDF : 72 Pages
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XTAL1
XTAL2
D0-D7
A0
A1
A2
A7
nRES
nIOS
R/nW
nIRQ1
6801
COM2002
D0-D7
A0/nMUX
A1
A2/BALE
nCS
nRESET
nRD/nDS
nWR/nDIR
nINTR
XTAL1
RXIN
TXEN
nPULSE1
nPULSE2
GND
LTC1480 or
Equiv.
XTAL2
Differential Driver
Configuration
* Media Interface
may be replaced
with Figure A, B or C.
27 pF
20MHz
XTAL
27 pF
HYC9068 or
HYC9088
3.3V-5V Converter
RXIN
RXIN
+5V
10 +
0.47
uF
uF
6
12
nTXEN N/C
11
nPULSE1
nPULSE1
nPULSE2
nPULSE2
GND
17, 19,
4, 13, 14
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 3 - NON-MULTIPLEXED, 6801-LIKE BUS INTERFACE WITH RS-485 INTERFACE
15
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