CY28551 Datasheet, PDF (1/30 Pages) Cypress Semiconductor – Universal Clock Generator for Intel, VIA, and SIS®

CY28551
Universal Clock Generator for Intel, VIA,
and SIS^®
Features
• Compliant to Intel^® CK505
• Selectable CPU clock buffer type for Intel P4 or K8 selection
• Selectable CPU frequencies
• Universal clock to support Intel, SiS and VIA platform
• 0.7V Differential CPU clock for Intel CPU
• 3.3V Differential CPU clock for AMD K8
• 100 MHz differential SRC clocks
• 96 MHz differential dot clock
• 133 MHz Link clock
• 48 MHz USB clock
• 33 MHz PCI clocks
• Dynamic Frequency Control
• Dial-A-Frequency^®
• WatchDog Timer
• Two Independent Overclocking PLLs
• Low-voltage frequency select input
• I²C support with readback capabilities
• Ideal Lexmark Spread Spectrum profile for maximum
electromagnetic interference (EMI) reduction
• 3.3V Power supply
• 64-pin QFN package
CPU SRC SATA PCI REF LINK DOT96 24_48M 48M
x 2 x 8 x1 x 7 x 3 x2
x1
x1
x1
Block Diagram
Xin
14.318MHz
Xout
Crystal
PLL Reference
DOC[2:1]
FS[D:A]
SEL_P4_K8
SEL[1:0]
PLL1 ^Divider
CPU
PLL2 _Divider
PCIEX
Multiplexer
Controller
PLL3 Divider
SATA
TPWR_GD#/PD
SEL24_48
RESET_I#
SDATA
SCLK
PLL4
Fixed Divider
I2C
Logic
WDT
Pin Configuration
VDD_REF
REF[2:0]
VDD_CPU
CPUT[1:0]
CPUC[1:0]
VDD_PCIEX
PCIET [8:1]
PCIEC [8:1]
VDD_SATA
PCIET0 /SATAT
PCIEC0 /SATAC
VDD_DOT
DOT96T/SATAT/LINK0
DOT96C/SATAC/LINK1
VDD_PCI
PCI[6:0]
64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49
PCI6_F 1
48 VDDREF
VDD48 2
**SEL24_48 / 24_48M 3
47 SCLK
46 SDATA
**SEL1/48M 4
45 VTTPWRG#/PD
VSS48 5
44 CPUT0
VDDDOT 6
43 CPUC0
LINK0/DOT96T/SATAT 7
42 VDDCPU
LINK1/DOT96C/SATAC 8
VSSDOT 9
CY28551
41 CPUT1
40 CPUC1
VDDSATA 10
39 VSSCPU
SATAT/PCIEXT0 11
38 **DOC2
SATAC/PCIEXC0 12
37 VSSA
VSSSATA 13
36 VDDA
PCIEXT1 14
35 PCIEXT8/CPU_STP#
PCIEXC1 15
34 PCIEXC8/PCI_STP#
VSSPCIE 16
33 VDDPCIE
17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32
VDD_48
48M
24_48M
SRESET#
* Indicates internal pull up
** indicates internal pull down
Cypress Semiconductor Corporation
Document #: 001-05675 Rev. *C
• 198 Champion Court • San Jose, CA 95134-1709 • 408-943-2600
Revised July 26, 2006