CY28324 Datasheet, PDF (1/21 Pages) Cypress Semiconductor – FTG for Intel Pentium 4 CPU and Chipsets

CY28324
FTG for Intel^® Pentium^® 4 CPU and Chipsets
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 3V66
PCI
REF
48M 24_48M
x2
x4
x 10
x2
x1
x1
Block Diagram
X1
X2
*FS0:4
VTT_PWRGD#
*CPU_STP#
*MULTSEL0:1
XTAL
OSC
PLL Ref Freq
PLL 1
Divider
Network
Stop
Clock
Control
PWR_DWN#
*PCI_STP#
PLL2
SDATA
SCLK
SMBus
Logic
Stop
Clock
Control
2
VDD_REF
REF0:1
Pin Configuration
SSOP-48
*MULTSEL1/REF1 1
VDD_CPU
CPU0:1, CPU0:1#
VDD_REF 2
X1 3
X2 4
GND_PCI 5
*FS2/PCI_F0 6
VDD_MREF
*FS3/PCI_F1 7
3VMREF, 3VMREF# *MODE/PCI_F2
8
VDD_PCI 9
VDD_3V66
*FS4/PCI0 10
3V66_0:3
PCI1 11
PCI2 12
VDD_PCI
PCI_F0:2
GND_PCI 13
PCI3 14
PCI4 15
PCI0:6
PCI5 16
PCI6 17
VDD_PCI 18
VTT_PWRGD# 19
RST# 20
GND_48MHz 21
*FS0/48MHz 22
VDD_48MHz
48MHz
*FS1/24_48MHz 23
VDD_48MHz 24
48 REF0/MULTSEL0*
47 GND_REF
46 VDD_MREF
45 3VMREF/CPU_STP#*
44 3VMREF#/PCI_STP#*
43 GND_MREF
42 PWR_DWN#
41 CPU0
40 CPU0#
39 VDD_CPU
38 CPU1
37 CPU1#
36 GND_CPU
35 IREF
34 VDD_CORE
33 GND_CORE
32 VDD_3V66
31 3V66_0
30 3V66_1
29 GND_3V66
28 3V66_2
27 3V66_3
26 SCLK
25 SDATA
24_48MHz
Note:
1. Signals marked with ‘*’ have internal pull-up resistor.
RST#
Intel and Pentium are registered trademarks of Intel Corporation.
Rev 1.0, November 20, 2006
2200 Laurelwood Road, Santa Clara, CA 95054
Tel:[phone] Fax:[phone]
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