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FTG for Intel Pentium 4 CPU and Chipsets
CY28323PVC
....Document #: 38-07004 Rev. *B Page Page 1 of 21 of 21
400 West Cesar Chavez, Austin, TX 78701
1+(512) 416-8500
1+(512) 416-9669
www.silabs.com
Features
Compatible to Intel CK-Titan & CK-408 Clock Synthe-
sizer/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
Capable of generating system RESET after a Watchdog
timer time-out occurs or a change in output frequency
via SMBus interface
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
CPU
3V66
PCI
REF
48M
24_48M
x 3
x 4
x 10
x 2
x 1
Note:
1. Signals marked with ‘*’ and “^” has internal pull-up and pull-down resistors respectively.
~
Block Diagram
Pin Configuration
VDD_REF
CPU0:1, CPU0:1#,
XTAL
PLL Ref Freq
X2
X1
VDD_PCI
OSC
SCLK
PLL 1
SMBus
Logic
VDD_48MHz
SDATA
VDD_3V66
Divider
Network
VDD_CPU
PLL2
*FS0:4
2
PWR_DWN#
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#
RST#
GND_48MHz
*FS0/48MHz
*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
PWR_DWN#
CPU0
CPU0#
VDD_CPU
CPU1
CPU1#
GND_CPU
IREF
VDD_CORE
GND_CORE
VDD_3V66
3V66_0
3V66_1
GND_3V66
3V66_2
3V66_3
SCLK
SDATA
C
Y
283
23
*MULTSEL0:1
3V66_0:3
PCI_F0:2
PCI0:6
48MHz
24_48MHz
RST#
CPU_ITP, CPU_ITP#
[[1]]
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