Cirrus Logic Crystal LAN CS8900A Application Note page 7

X1
1 2
XTAL
20.0 MHz
SA00
SA01
SA02
SA03
SA04
SA05
SA06
SA07
SA08
SA09
SA10
SA11
SA12
SA13
SA14
SA15
SA16
SA17
SA18
SA19
SMEMW
SMEMR
IOW
IOR
REFRESH
SBHE
AEN
TSTSEL
RESET
+5V
AN83REV3
4.99k, 1%
R4
93
RES
97
XTL1
98
XTL2
37
ISA0
38
ISA1
39
ISA2
40
ISA3
41
ISA4
42
ISA5
43
ISA6
44
ISA7
45
ISA8
46
ISA9
47
ISA10
48
ISA11
50
ISA12
51
ISA13
52
ISA14
53
ISA15
54
ISA16
58
ISA17
59
ISA18
60
ISA19
7
CHIPSEL
28
MEMW
29
MEMR
62
IOW
61
IOR
49
REFRESH
36
SBHE
63
AEN
76
TESTSEL
77
SLEEP
75
RESET
Figure 9. Overall Schematic
+5V
EEDATAOUT
BSTATUS / HC1
U1
CS8900
0.1 µ F
1
CS
EE_CLK
2
CLK
3
U3
D1
5
VSS
1K_EEPROM_S
3
EECS
5
99
LED0/HC0
78
LED2 100
DO- 84
DO+ 83
CI- 82
CI+ 81
80
DI-
79
DI+
RXD- 92
91
RXD+
88
TXD-
87
TXD+
32
INTRQ0
31
INTRQ1
INTRQ2 30
INTRQ3 35
MEMCS16 34
I0CS16 33
I0CHRDY 64
15
DMARQ0
13
DMARQ1
11
DMARQ2
CSOUT 17
+5V
C7
VCC 8
D0 4
NC2 7
NC1 6
10BT_RD-
10BT_RD+
10BT_TD-
10BT_TD+
IRQ10
IRQ11
IRQ12
IRQ5
MEMCS16
I0CS16
I0CHRDY
DRQ5
DRQ6
DRQ7