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CY28412OCT

Description
Clock Generator for Intel㈢ Grantsdale Chipset
File Size206KB,16 Pages
ManufacturerSpectraLinear
Websitehttp://www.spectralinear.com/
Download Datasheet Compare View All

CY28412OCT Overview

Clock Generator for Intel㈢ Grantsdale Chipset

PRELIMINARY
CY28412
Clock Generator for Intel
®
Grantsdale Chipset
Features
• Supports Intel P4 and Prescott CPU
• Selectable CPU frequencies
• Differential CPU clock pairs
• 100 MHz differential SRC clocks
• 96 MHz differential dot clock
• 48 MHz USB clocks
• 33 MHz PCI clock
CPU
x2 / x3
SRC
x7 / x8
PCI
x8
REF
x2
DOT96
x1
USB_48
x1
• Low-voltage frequency select input
• I
2
C Support with read back capabilities
• Ideal Lexmark Spread Spectrum profile for maximum
electromagnetic interference (EMI) reduction
• 3.3V power supply
• 56-pin SSOP package
Block Diagram
XIN
XOUT
CPU_STP#
PCI_STP#
FS_[C:A]
VTT_PWRGD#
IREF
Pin Configuration
PCI0
PCI1
VDD_PCI
VDD_CPU
GND_PCI
CPUT[0:1], CPUC[0:1],
CPU(T/C)2_ITP]
PCI2
VDD_SRC
PCI3
SRCT[0:6], SRCC[0:6],
PCI4
SATA[T/C]
PCI5
GND_PCI
VDD_PCI
VDD_PCI
TEST_SEL/PCIF0
PCI[0:5]
ITP_EN/PCIF1
VDD_PCIF
PCIF[0:1]
VDD_48
USB48/FS_B
GND_48
VDD_48 MHz
DOT96T
DOT96T
DOT96C
DOT96C
VTT_PwrGd#/PD
USB_48
SRCT0
SRCC0
SRCT1
STCC1
VDD_SRC
GND_SRC
SRCT2
SRCC2
SATAT
SATAC
VDD_REF
REF[1:0]
XTAL
OSC
PLL1
PLL Ref Freq
Divider
Network
PD
PLL2
SDATA
SCLK
I
2
C
Logic
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
56
55
54
53
52
51
50
49
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
VDD_REF
REF0/FS_C
REF1/FS_A
GND_REF
X1
X2
SDATA
SCLK
GND_CPU
CPUT0
CPUC0
VDD_CPU
CPUT1
CPUC1
IREF
GND_A
VDD_A
CPUT2_ITP/SRCT6
CPUC2_ITP/SRCC6
VDD_SRC
SRCT5
SRCC5
GND_SRC
SRCT4
SRCC4
SRCT3
SRCC3
VDD_SRC
56 SSOP
CY28412
Rev 1.0, November 20, 2006
2200 Laurelwood Road, Santa Clara, CA 95054
Tel:(408) 855-0555
Fax:(408) 855-0550
Page 1 of 16
www.SpectraLinear.com

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