PRELIMINARY
CY28324
FTG for Intel
廬
Pentium
廬
4 CPU and Chipsets
Features
鈥?Compatible to Intel
廬
CK-00, CK-Titan & CK-408 Clock
Synthesizer/Driver Specifications
鈥?System frequency synthesizer for Intel 850, Brookdale
(845) and Brookdale - G Pentium
廬
4 Chipsets
鈥?Programmable clock output frequency with less than 1
MHz increment
鈥?Integrated fail-safe Watchdog Timer for system
recovery
鈥?Automatically switch to HW selected or SW
programmed clock frequency when Watchdog Timer
time-out
鈥?Capable of generating system RESET after a Watchdog
Timer time-out occurs or a change in output frequency
via SMBus interface
鈥?Support SMBus byte read/write and block read/write
operations to simplify system BIOS development
鈥?Vendor ID and Revision ID support
鈥?Programmable drive strength support
鈥?Programmable output skew support
鈥?Power management control inputs
鈥?Available in 48-pin SSOP
CPU
x2
3V66
x4
PCI
x 10
REF
x2
48M
x1
24_48M
x1
Block Diagram
X1
X2
Pin Configuration
VDD_REF
REF0:1
XTAL
OSC
PLL 1
SSOP-48
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
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
PLL Ref Freq
Divider
Network
Stop
Clock
Control
*FS0:4
VTT_PWRGD#
*CPU_STP#
*MULTSEL0:1
PWR_DWN#
Stop
Clock
Control
*PCI_STP#
*MULTSEL1/REF1
VDD_REF
X1
X2
GND_PCI
*FS2/PCI_F0
*FS3/PCI_F1
VDD_MREF
3VMREF, 3VMREF#
*MODE/PCI_F2
VDD_PCI
VDD_3V66
*FS4/PCI0
3V66_0:3
PCI1
PCI2
GND_PCI
VDD_PCI
PCI3
PCI_F0:2
PCI4
PCI0:6
PCI5
PCI6
VDD_PCI
VTT_PWRGD#
RST#
GND_48MHz
*FS0/48MHz
*FS1/24_48MHz
VDD_48MHz
VDD_48MHz
VDD_CPU
CPU0:1, CPU0:1#
48MHz
~
CY28324
PLL2
24_48MHz
2
Note:
1. Signals marked with 鈥?鈥?have internal pull-up resistor.
SDATA
SCLK
SMBus
Logic
RST#
Intel and Pentium are registered trademarks of Intel Corporation.
Cypress Semiconductor Corporation
Document #: 38-07002 Rev. *A
鈥?/div>
3901 North First Street
鈥?/div>
San Jose
鈥?/div>
CA 95134 鈥?408-943-2600
Revised November 14, 2001
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