
Clock Generator for IntelCalistoga Chipset
CY28446
....................... Document #: 001-00168 Rev *F Page 1 of 19
400 West Cesar Chavez, Austin, TX 78701
1+(512) 416-8500
1+(512) 416-9669
www.silabs.com
Features
Compliant to Intel CK410M
Selectable CPU frequencies
Low power differential CPU clock pairs
100 MHz Low power differential SRC clocks
96 MHz Low power differential DOT clock
48 MHz USB clock
SRC clocks stoppable through OE#
33 MHz PCI clocks
Buffered 14.318 MHz reference clock
Low-voltage frequency select input
I2C support with readback capabilities
Ideal Lexmark Spread Spectrum profile for maximum
electromagnetic interference (EMI) reduction
3.3V Power supply
64 pin QFN package
Table 1. Output Configuration Table
CPU
SRC
PCI
REF
DOT96
48M
x2/x3
x9/10
x5
x1
x 1
Pin Configuration
OE
1#
FS_B
/TES
T_MODE
D
O
T
C
_96
D
O
T
_96
V
D
_48
V
SS_P
C
I
U
SB_48/F
S
_A
FS_C/TES
T_SE
L
VTTP
W
R
GD#/PD
V
SS_P
C
I
VD
D_
P
C
I
P
C
IF0/ITP
_
EN
PC
I0
PC
I1
PC
I2
PC
I3
64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49
VSS_48
1
48
VDD_PCI
SRCT0
2
47
REF
SRCC0
3
46
VSS_REF
OE0#
4
45
XIN
SRCT1
5
44
XOUT
SRCC1
6
43
VDD_REF
OEA#
7
42
SDATA
SRCT2
8
41
SCLK
SRCC2
9
40
CPU_STOP#
VDD_SRC
10
39
CPUT0
VSS_SRC
11
38
CPUC0
OE3#
12
37
VSS_CPU
SRCT3
13
36
VDD_CPU
SRCC3
14
35
CPUT1
OE6#
15
34
CPUC1
PCI_STOP#
16
33
VSS_SRC
17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32
VD
D_
S
R
C
SR
CT5
SR
CC
5
SR
CC
6
SR
CT6
SR
CT8
SR
CC
8
OE
B#
SR
CC
9
SR
CT9
SRC
T
10
SR
CC
1
0
VD
D_
S
R
C
VSS
_SR
C
CP
UC
2_ITP/SR
C
7
CP
UT
2
_
IT
P
/S
R
C
T
7
CY28446