CS8900A
Crystal LAN™ ISA Ethernet Controller
20 MHz
5 V
4.99 k
93
Ω
, 1%
4.7 k
Ω
10 BASE T
Isolation
Transformer
97
98
77
76
EEPROM
93C46
XTAL1 XTAL2 SLEEP
TEST RES
RJ45
1
4
3
2
3
6
5
4
92
1
16
14
6
CS
DO
DI
EECS
RXD-
1:1
100 Ω, 1%
EEDATAIN
EEDATAOUT
EESK
91
88
3
3
2
RXD+
TXD-
24.3 Ω, 1%
CLK
6
11
10
68 pF
1:
2
87
8
9
1
ISA
BUS
TXD+
Address
Decoder
PAL
.1 µF
12 V
24.3 Ω, 1%
4
7
LA[20:23]
CHIPSEL
CS8900A
15 pin D
AUI Isolation
Transformer
13
BALE
ELCS
20
84
83
82
81
80
79
1
2
4
5
7
8
16 10
SA[0:19]
SA[0:19]
MEMW
DO-
DO+
CI-
1:1
1:1
1:1
28
29
62
61
49
36
63
75
34
33
64
15
13
12
3
9
2
MEMR
IOW
CI+
DI-
10 12
IOR
9
5
REFRESH
SBHE
DI+
4, 6
39.2
39.2
Ω
, 1%
, 1%
39.2
Ω
, 1%
39.2
0.1
Ω, 1%
Ω
AEN
0.1
µ
F
µ
F
RESET
MEMCS16
IOCS16
IOCHRDY
SD[0:15]
INTRQ0
INTRQ1
INTRQ2
INTRQ3
DMARQ0
DMACK0
DMARQ1
DMACK1
DMARQ2
DMACK2
78
BSTATUS/HCI
5 V
680
680
Ω
Ω
100
16
LANLED
LINKLED
CSOUT
32
31
30
35
15
16
13
14
11
12
IRQ10
IRQ11
IRQ12
IRQ5
99
17
74LS245
OE
Boot-PROM
27C256
19
1
DRQ5
DACK5
DRQ6
DACK6
DRQ7
DACK7
20
22
CE
OE
DIR
PD[0:7]
15
8
SA[0:14]
SD[0:7]
Figure 3. Typical Connection Diagram
CIRRUS LOGIC PRODUCT DATA SHEET
DS271PP3
11
CIRRUS [ CIRRUS LOGIC ]
