
Clock Generator for IntelCalistoga Chipset
CY28445-5
........................Document #: 38-07739 Rev *C Page 1 of 25
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
Differential CPU clock pairs
100 MHz differential SRC clocks
96 MHz differential dot clock
27 MHz Spread and Non-spread video clock
48 MHz USB clock
SRC clocks independently stoppable through
CLKREQ#
96/100 MHz Spreadable differential video clock.
33 MHz PCI clock
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
68-pin QFN (MLF) package
CPU
SRC
PCI
REF
DOT96
USB_48M
LCD100M
27M
x2 / x3
x8/9/10
x7
x2
x 1
x1
x2
Pin Configuration
Block Diagram
IREF
VDD
REF
VDD
CPUT2_ITP/SRCT10
CPUC2_ITP/SRCC10
VDD
Divider
14.318MHz
Crystal
CPU
PLL
LVDS
PLL
Fixed
PLL
PLLReference
XIN
XOUT
PCI_STP#
FS[C:A]
VTT_PWRGD#/PD
CPUT[0:1]
CPUC[0:1]
SRCT[1:8]
VDD
PCI[1:5]
VDD
PCIF[0:1]
VDD_PCI
CPU_STP#
CLKREQ#
VDD
FCTSEL[0:1]
SEL_CLKREQ
ITP_SEL
SRCC[1:8]
48M
VDD48
SRCT0/100MT_SST
SRCC0/100MC_SST
I2C
Logic
SDATA
SCLK
27MHz
PLL
Divider
27M- Spread
VDD
VDD48
DOT96T
DOT96C
27M- nonSpread
VDD48
PCI
F
0
/
IT
P
_
S
E
L
VD
D_P
C
I
VS
S_
PCI
P
C
I5
/
FC
TS
E
L
1
PC
I4
PC
I3
VS
S_
PCI
VD
D_P
C
I
CL
KRE
Q
#_
5
CL
KRE
Q
#_
3
PC
I2
PC
I1
PC
I_
STP#
CP
U_S
T
P
#
RE
F0
/
FS
C
RE
F1
/
FCT
S
E
L
0
VS
S_
REF
68 67 66 65 64 63 62 61 60 59 58 57 56 55 54 53 52
PCIF1
1
51 XIN
VTT_PWRGD# / PD
2
50 XOUT
VDD48
3
49 VDD_REF
48M/FSA
4
48 SDATA
VSS48
5
47 SCLK
DOT96T / 27MHz non spread
6
46 VSS_CPU
DOT96C/ 27MHz spread
7
45 CPUT0
FSB
8
44 CPUC0
CLKREQ#_1
9
43 VDD_CPU
SRCT_0 / LCD100MT
10
42 CPUT1
SRCC_0 / LCD100MC
11
41 CPUC1
VDD_SRC
12
40 IREF
SRCT_1
13
39 VSSA
SRCC_1
14
38 VDDA
SRCT_2
15
37 CPUT2_ITP / SRCT_10
SRCC_2
16
36 CPUC2_ITP / SRCC_10
VDD_SRC
17
35 VDD_SRC
18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34
S
RCT
_3
S
RCC_
3
CLK
R
EQ#
_
4
S
RCT
_4
S
RCC_
4
S
RCT
_5
S
RCC_
5
CLK
R
EQ#
_
6
S
RCT
_6
S
RCC_
6
VD
D_S
R
C
S
RCT
_7
S
RCC_
7
VS
S_S
R
C
S
RCC_
8
S
RCT
_8
CLK
R
EQ#
_
8
CY28445-5