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CY28378OC Datasheet(PDF) 1 Page - SpectraLinear Inc

Part # CY28378OC
Description  FTG for Pentium 4짰 and Intel짰 845 Series Chipset
Download  21 Pages
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Manufacturer  SPECTRALINEAR [SpectraLinear Inc]
Direct Link  http://www.spectralinear.com
Logo SPECTRALINEAR - SpectraLinear Inc

CY28378OC Datasheet(HTML) 1 Page - SpectraLinear Inc

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FTG for Pentium 4® and Intel® 845 Series Chipset
CY28378
Rev 1.0, November 20, 2006
Page 1 of 21
2200 Laurelwood Road, Santa Clara, CA 95054
Tel:(408) 855-0555
Fax:(408) 855-0550
www.SpectraLinear.com
Features
•Compatible with Intel® CK-Titan and CK-408 Clock
Synthesizer/Driver specifications
• System frequency synthesizer for Intel Brookdale 845
and Brookdale – G Pentium 4® chipsets
• Programmable clock output frequency with less than
1-MHz increment
• Integrated fail-safe Watchdog timer for system
recovery
• Automatically switch to HW selected or SW
programmed clock frequency when Watchdog timer
time-out
• Programmable 3V66 and PCI output frequency mode
• Capable of generating system RESET after a Watchdog
timer time-out or a change in output frequency via
SMBus interface occurs
• Support SMBus byte read/write and block read/ write
operations to simplify system BIOS development
• Vendor ID and Revision ID support
• Programmable drive strength support
• Programmable output skew support
• Power management control inputs
• Available in 48-pin SSOP
Table 1. Frequency Table
CPU
3V66
PCI
REF
48M
24_48M
x 3
x 4
x 10
x 2
x 1
x 1
Note:
1. Signals marked with ‘*’ and ‘**’ have internal pull-up and pull-down resistors, respectively.
Block Diagram
VDD_REF
CPUT[0:1], CPUC[0:1],
XTAL
PLL Ref Freq
X2
X1
VDD_PCI
OSC
SCLK
PLL 1
SMBus
Logic
VDD_48MHz
SDATA
VDD_3V66
Divider
Network
VDD_CPU
*FS0:4
2
PWRDWN#
SSOP-48
REF0:1
VTT_PWRGD#
*MULTSEL1/REF1
VDD_REF
X1
X2
GND_PCI
*FS2/PCI_F0
*FS3/PCI_F1
PCI_F2
VDD_PCI
*FS4/PCI0
PCI1
PCI2
GND_PCI
PCI3
PCI4
PCI5
PCI6
VDD_PCI
VTT_PWRGD#
RESET#
GND_48MHz
*FS0/48MHz_0
*FS1/24_48MHz
VDD_48MHz
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
28
27
26
25
32
31
30
29
REF0/MULTSEL0**
GND_REF
VDD_CPU
CPU_ITP
CPU_ITP#
GND_CPU
PWRDWN#*
CPUT0
CPUC0
VDD_CPU
CPUT1
CPUC1
GNDC_CPU
IREF
VDD_CORE
GND_CORE
VDD_3V66
3V66_0
3V66_1
GND_3V66
3V66_2
3V66_3/48MHz_1
SCLK
SDATA
*MULTSEL0:1
3V66_0:2
PCI_F0:2
PCI0:6
48MHz_0
24_48MHz
RESET#
CPU_ITP, CPU_ITP#
VDD_48MHz
3V66_3/48MHz_1
2
Fract.
Aligner
PLL2
Pin Configuration[1]


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