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CY28341ZCT

更新时间: 2024-11-18 03:57:23
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SPECTRALINEAR 晶体外围集成电路光电二极管双倍数据速率时钟
页数 文件大小 规格书
19页 264K
描述
Universal Single-Chip Clock Solution for VIA P4M266/KM266 DDR Systems

CY28341ZCT 数据手册

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CY28341  
Universal Single-Chip Clock Solution for VIA P4M266/KM266  
DDR Systems  
Features  
Table 1. Frequency Selection Table  
• Supports VIA¥ P4M266/KM266 chipsets  
• Supports Pentium® 4, Athlon™ processors  
• Supports two DDR DIMMS  
FS(3:0)  
0000  
0001  
0010  
0011  
0100  
0101  
0110  
0111  
1000  
1001  
1010  
1011  
1100  
1101  
1100  
1111  
CPU  
AGP  
66.80  
66.80  
60.00  
66.67  
72.00  
70.00  
64.00  
70.00  
77.00  
73.33  
60.00  
60.00  
60.00  
66.67  
66.67  
66.67  
PCI  
66.80  
33.40  
33.40  
30.00  
33.33  
36.00  
35.00  
32.00  
35.00  
38.50  
36.67  
30.00  
30.00  
30.00  
33.33  
33.33  
33.33  
100.00  
120.00  
133.33  
72.00  
• Supports three SDRAMS DIMMS at 100 MHz  
• Provides:  
— Two different programmable CPU clock pairs  
— Six differential SDRAM DDR pairs  
— Three low-skew/low-jitter AGP clocks  
— Seven low-skew/low-jitter PCI clocks  
— One 48M output for USB  
105.00  
160.00  
140.00  
77.00  
— One programmable 24M or 48M for SIO  
110.00  
180.00  
150.00  
90.00  
• Dial-a-Frequency™ and Dial-a-dB¥ features  
• SpreadSpectrumforbestelectromagneticinterference  
(EMI) reduction  
100.00  
200.00  
133.33  
• Watchdog feature for systems recovery  
• SMBus-compatible for programmability  
• 56-pin SSOP and TSSOP packages  
Pin Configuration[1]  
Block Diagram  
VDDR  
XIN  
XOUT  
1
2
3
4
5
6
7
8
56  
55  
54  
53  
52  
51  
50  
49  
48  
47  
46  
45  
44  
43  
42  
41  
40  
39  
38  
37  
36  
35  
34  
33  
32  
31  
30  
29  
*FS0/REF0  
VSSR  
XIN  
XOUT  
VDDAGP  
AGP0  
VTTPWRGD#/REF1  
VDDR  
VSSC  
CPUT/CPUOD_T  
CPUC/CPUOD_C  
VDDC  
REF(0:1)  
VDDI  
XTAL  
FS2  
REF0  
CPUCS_T/C  
FS0  
VDDC  
SELP4_K7#  
*SELP4_K7/AGP1  
AGP2  
VSSAGP  
**FS1/PCI_F  
**SELSDR_DDR/PCI1  
VDDI  
CPU(0:1)/CPU0D_T/C  
PLL1  
CPUCS_C  
CPUCS_T  
VSSI  
FBOUT  
BUF_IN  
DDRT0/SDRAM0  
DDRC0/SDRAM1  
DDRT1/SDRAM2  
DDRC1/SDRAM3  
VDDD  
9
VDDPCI  
10  
11  
12  
13  
14  
15  
16  
17  
18  
19  
20  
21  
22  
23  
24  
25  
26  
27  
28  
PCI(3:6)  
FS3 FS1  
*MULTSEL/PCI2  
VSSPCI  
PCI3  
PCI_F  
MULTSEL  
PCI2  
PD#  
PCI4  
VDDPCI  
PCI5  
PCI1  
VDDAGP  
AGP(0:2)  
PCI6  
VSSD  
VSS48M  
**FS3/48M  
**FS2/24_48M  
VDD48M  
VDD  
DDRT2/SDRAM4  
DDRC2/SDRAM5  
DDRT3/SDRAM6  
DDRC3/SDRAM7  
VDDD  
VDD48M  
48M  
SDATA  
SCLK  
SMBus  
PLL2  
/ 2  
WDEN  
VSS  
VSSD  
24_48M  
IREF  
*PD#/SRESET#  
SCLK  
DDRT4/SDRAM8  
DDRC4/SDRAM9  
DDRT5/SDRAM10  
DDRC5/SDRAM11  
SRESET#  
VDDD  
WD  
SDATA  
SELSDR_DDR  
FBOUT  
S2D  
DDRT(0:5)/SDRAM(0,2,4,6,8,10)  
DDRC(0:5)/SDRAM(1,3,5,7,9,11)  
56 pin SSOP  
Buf_IN  
CONVERT  
Note:  
1. Pins marked with [*] have internal pull-up resistors. Pins marked with [**] have internal pull-down resistors.  
Rev 1.0, November 20, 2006  
Page 1 of 19  
2200 Laurelwood Road, Santa Clara, CA 95054  
Tel:(408) 855-0555 Fax:(408) 855-0550  
www.SpectraLinear.com  

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