
PRELIMINARY
FTG for Intel
Pentium
4 CPU and Chipsets
CY28324
Cypress Semiconductor Corporation
Document #: 38-07002 Rev. *A
3901 North First Street
San Jose
CA 95134
Revised November 14, 2001
408-943-2600
Features
Compatible to Intel
CK-00, CK-Titan & CK-408 Clock
Synthesizer/Driver Specifications
System frequency synthesizer for Intel 850, 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
x 2
3V66
x 4
PCI
x 10
REF
x 2
48M
x 1
24_48M
x 1
Intel and Pentium are registered trademarks of Intel Corporation.
~
Block Diagram
Pin Configuration
VDD_REF
REF0:1
CPU0:1, CPU0:1#
XTAL
OSC
PLL Ref Freq
X2
X1
VDD_PCI
PCI_F0:2
SCLK
PLL 1
SMBus
Logic
VDD_48MHz
48MHz
SDATA
VDD_3V66
3V66_0:3
Divider
Network
VDD_CPU
Stop
Stop
PLL2
*FS0:4
2
*CPU_STP#
*MULTSEL0:1
PWR_DWN#
*PCI_STP#
SSOP-48
VTT_PWRGD#
*MULTSEL1/REF1
VDD_REF
X1
X2
GND_PCI
*FS2/PCI_F0
*FS3/PCI_F1
*MODE/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
32
31
30
29
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
REF0/MULTSEL0*
GND_REF
VDD_MREF
3VMREF/CPU_STP#*
3VMREF#/PCI_STP#*
GND_MREF
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
PCI0:6
24_48MHz
RST#
VDD_MREF
3VMREF, 3VMREF#
Note:
1.
Signals marked with
‘
*
’
have internal pull-up resistor.