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CY28326 Datasheet

  • CY28326

  • FTG for VIA PT880 Serial Chipset

  • 23頁

  • CYPRESS

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CY28326
FTG for VIA PT880 Serial Chipset
Features
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
Supports P4
錚?/div>
CPUs
3.3V power supply
Ten copies of PCI clocks
One 48 MHz USB clock
Two copies of 25 MHz for SRC/LAN clocks
One 48 MHz/24 MHz programmable SIO clock
鈥?Three differential CPU clock pairs
鈥?SMBus support with Byte Write/Block Read/Write
capabilities
鈥?Spread Spectrum EMI reduction
鈥?Dial-A-Frequency
features
鈥?Auto Ratio features
鈥?48-pin SSOP package
Block Diagram
XIN
XOUT
PLL1
CPU_STP#
IREF
Power
on
Latch
/2
Pin Configuration
[1]
REF[0:2]
CPUT[0:2]
CPUC[0:2]
25MHz[0:1]
AGP[0:2]
FS[A:D]
VTTPWRGD#
PCI_STP#
**FSA/REF0
**FSB/REF1
VDDREF
XIN
XOUT
VSSREF
*FSC/PCIF0
*FSD/PCIF1
*Mode/PCIF2
VDDPCI
VSSPCI
PCI0
PCI1
PCI2
PCI3
PCI4
VDDPCI
VSSPCI
*(PCI_STP#)/Ratio0/PCI5
*(CPU_STP#)/Ratio1/PCI6
48MHz
**24_48_SEL/24_48MHz
VSS48
VDD48
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
VDDA
VSSA
IREF
CPUT2
CPUC2
VSSCPU
CPUT1
CPUC1
VDDCPU
CPUT0
CPUC0
VSSSRC
25MHz1
25MHz0
VDDSRC
*VTT_PWRGD/*PD#
SD
ATA
SCLK
SRESET#
AGP2
VSSAGP
VDDAGP
AGP1/*RatioSel
AGP0
CY2 8 3 2 6
PCI[0:6]
PCI_F[0:2]
PLL2
MODE
PD#
SDATA
SCLK
WD
Logic
I2C
Logic
48MHz
24_48MHz
SRESET
48 Pin SSOP
Note:
1. Pins marked with [*] have internal 150k鈩?pull-up resistors. Pins marked with [**] have internal 150k鈩?pull-down resistors.
Cypress Semiconductor Corporation
Document #: 38-07616 Rev. *A
鈥?/div>
3901 North First Street
鈥?/div>
San Jose
,
CA 95134
鈥?/div>
408-943-2600
Revised June 22, 2004

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