Cirrus Logic CRYSTAL LAN CS890 Technical Reference Manual page 14

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
14
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
+5V
Figure 2.1.2. Overall Schematic
CS8900 Technical Reference Manual
+5V
EEDATAOUT
LED0/HC0
BSTATUS / HC1
U1
CS8900
MEMCS16
I0CHRDY
DMARQ0
DMARQ1
DMARQ2
0.1 µ F
1
CS VCC
EE_CLK
2
CLK D0
3
U3
D1
NC2
5
VSS
NC1
1K_EEPROM_S
3
EECS
5
99
78
LED2 100
84
DO-
DO+ 83
CI- 82
CI+ 81
DI- 80
DI+ 79
RXD- 92
10BT_RD-
91
RXD+ 10BT_RD+
88
TXD- 10BT_TD-
87
TXD+ 10BT_TD+
INTRQ0 32
IRQ10
31
INTRQ1
IRQ11
INTRQ2 30
IRQ12
INTRQ3 35
IRQ5
34
MEMCS16
I0CS16 33
I0CS16
64
I0CHRDY
15
DRQ5
13
DRQ6
11
DRQ7
CSOUT 17
AN83REV1
+5V
C7
8
4
7
6