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+3.3V
CLKAVDD
+3.3V
R118
1
2
22R3
1
TC14
BC285
BC168
2
ST22U
SCD1U
SC4D7U16V6ZY
Width-Space
6mil-10mil
R207
$VGA14M
1
2
10
$VGA14M
47R3
R206
AUDIO14M
1
2
23
AUDIO14M
47R3
R208
MODEM14M
1
2
16mil
19
MODEM14M
47R3
CLKAVDD
R216
33_14M
1
2
4
33_14M
47R3
R209
1
2
$P33CLK
$P33CLK
4
REF0
47R3
2272X1
R210
2272X2
1
2
$VGACLK
REF1
$VGACLK
10
47R3
PCICLK_F
R211
PCICLK0
1
2
$CARDCLK
PCICLK1
$CARDCLK
25
PCICLK2
47R3
R212
1
2
$P31CLK
3
$P31CLK
47R3
R213
1
2
PWR_DWN#
+3.3V
SEL1
20KR3
$SMBDATA
1,4,5,8,26
$SMBCLK
4,5,8,26
BC274
MODEM14M
SC33P
$USBCLK
BC273
$VGA14M
SC33P
$SIO24M
BC272
AUDIO14M
SC33P
BC275
33_14M
SC33P
$CPUCLK
$L2CLK
BC276
$P33CLK
$31CLK
SC33P
BC277
$VGACLK
$SDRAM_CLK0
SC33P
BC278
$CARDCLK
$SDRAM_CLK1
SC22P
BC279
$P31CLK
SC33P
CX16
BC150
BC165
BC162
BC151
BC152
SC1KP
SCD1U
SC1KP
SCD1U
SC1KP
SCD1U
(SMT)
X2
4
3
1
2
2272X1
2272X2
XTAL4P-14.318MHZ
BC149
BC148
SC10P
SC10P
16mil
VIO
40mil
+3.3V
+3.3V
U23
1
48
AVDD
VDDQS
2
47
USBCLK
REF0
USBCLK
3
46
SIO24M
VSS
IOCLK
4
45
XTALIN
VSS
5
44
CPUCLK
XTALOUT
CPUCLK0
6
43
L2CLK
REF1
CPUCLK1
7
42
VDDQS
VDDCPU
8
41
31CLK
PCICLK_F
CPUCLK2
9
40
VSS
CPUCLK3
10
39
PCICLK0
VSS
11
38
SDRAM0
PCICLK1
SDRAM0
12
37
SDRAM1
PCICLK2
SDRAM1
13
36
PCICLK3
VDDQS
14
35
VDDQS
SDRAM2
15
34
PCICLK4
SDRAM3
16
33
VSS
VSS
17
32
EPCICLK
SDRAM4
18
31
VSS
SDRAM5
19
30
VDDQS
VDDQS
20
29
PWR_DWN#
CPU_STOP#
21
28
$PCISTP#
SEL1
PCI_STOP#
$PCISTP#
22
27
VSS
VSS
23
26
$CPUSTP#
SDATA
SEL0
$CPUSTP#
24
25
SEL2
SCLK
SEL2
CY2272
BC289
+3.3V
SC10P
BC290
+5V
SC22P
1
R239
100KR3
2
CLKSEL1
1
CLKSEL1
BC291
SC10P
BC292
SC10P
+5V
BC293
1
SC15P
R237
100KR3
2
BC294
CLKSEL2
CLKSEL2
1
SC10P
BC295
SC10P
+3.3V
VIO
BC166
BC167
BC161
SCD1U
SC4D7U16V6ZY
SC4D7U10V5ZY
R227
1
2
$USBCLK
$USBCLK
4
47R3
R228
1
2
$SIO24M
$SIO24M
20
47R3
R229
1
2
$CPUCLK
$CPUCLK
1
56R3
R230
1
2
$L2CLK
$L2CLK
6
8mil-12mil
56R3
R231
1
2
$31CLK
$31CLK
3
56R3
R232
1
2
$SDRAM_CLK0
$SDRAM_CLK0
8
56R3
R233
1
2
$SDRAM_CLK1
$SDRAM_CLK1
8
56R3
4
4
$SLOWDWN
$SLOWDWN
4
BC286
SCD1U
+3.3V
1
R238
U24A
47KR3
1
4
1
2
2
3
SEL1
7
SOLCX125M
SEL1
0
0
$SLOWDWN
+3.3V
CPUSTOP#=SEL0=0 => freq/4
+3.3V
1
R236
CLKDWN=1 => SEL1=1, SEL2=1, freq=55MHz
U24B
47KR3
1
4
4
2
5
6
SEL2
7
SOLCX125M
VIO
CX15
BC164
BC163
SC1KP
SCD1U
SC4D7U10V5ZY
+3.3V
R234
$PCISTP#
1
2
10KR3
R235
1
2
$CPUSTP#
10KR3
V : Install
X : Not install
SEL1
SEL2
SEL2
CPUCLK
R107
R99
0
60.0MHz
V
V
1
66.6MHz
V
X
Acer Inc.
365
Title
Clock Generator CY2272
Size Document Number
REV
B
97160-SB, CLOCK
V14
Date:
February
3, 1998
Sheet
9
of
28
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