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ICS9248-131 PDF预览

ICS9248-131

更新时间: 2024-09-28 22:11:03
品牌 Logo 应用领域
矽成 - ICSI /
页数 文件大小 规格书
16页 499K
描述
Frequency Generator & Integrated Buffers for Celeron & PII/III??

ICS9248-131 数据手册

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Integrated  
Circuit  
Systems, Incꢀ  
ICS9248-131  
Frequency Generator & Integrated Buffers for Celeron & PII/III™  
RecommendedApplication:  
™
ALI -Aladdin V - mobile style chipsets  
Pin Configuration  
OutputFeatures:  
VDDF  
*REF0/CPU2.5_3.3#  
GND  
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  
VDDAGP  
AGP0  
AGP1  
•
•
•
•
•
•
3-CPUs@2ꢀ5/3ꢀ3V, upto100MHzꢀ  
3-AGPCLK@3ꢀ3V  
13-SDRAM@3ꢀ3V  
6-PCI@3ꢀ3V  
1-48MHz,@3ꢀ3Vfixedꢀ  
1-REF@3ꢀ3V,14ꢀ318MHzꢀ  
X1  
X2  
VDDPCI  
GND  
CPUCLK0  
CPUCLK1  
VDDL  
CPUCLK2  
SDRAM12  
GND  
SDRAM0  
SDRAM1  
VDDSDR  
SDRAM2  
SDRAM3  
GND  
SDRAM4  
SDRAM5  
VDDSDR  
SDRAM6  
SDRAM7  
GND  
*PCICLK_F/FS1  
*PCICLK0/FS2  
GND  
PCICLK1  
PCICLK2  
PCICLK3  
PCICLK4  
VDDA  
BUFFERIN  
GND  
Features:  
•
Support power management: CPU, PCI, AGP stop and  
Power down Mode from I2C programmingꢀ  
Spread spectrum for EMI controlꢀ  
Uses external 14ꢀ318MHz crystal  
FS pins for frequency select  
•
•
•
*CPU_STOP#/SDRAM11  
*PCI_STOP#/SDRAM10  
VDDSDR  
*AGP_STOP#/SDRAM9  
*PD#/SDRAM8  
GND  
KeySpecifications:  
•
•
•
CPU–CPU:<250ps  
AGP–PCI:<550ps  
CPU(early)-PCI:1-4ns, Center2-6ns  
SDATA  
SCLK  
48MHz/FS0*  
AGP_F/MODE*  
48-Pin SSOP  
* Internal Pull-up Resistor of  
240K to 3ꢀ3V on indicated inputs  
Block Diagram  
Functionality  
PLL2  
48MHz  
CPU, SDRAM  
PCI  
(MHz)  
AGP  
(MHz)  
FS2 FS1 FS0  
(MHz)  
X1  
X2  
XTAL  
OSC  
REF  
1
1
1
1
0
0
0
0
1
1
0
0
1
1
0
0
1
0
1
0
1
0
1
0
100  
95.25  
83.3  
97  
33.33  
31.75  
33.30  
32.33  
30.50  
32.07  
33.33  
30.00  
66.67  
63.50  
66.60  
64.66  
61.00  
64.15  
66.67  
60.00  
PLL1  
Spread  
Spectrum  
CPU  
DIVDER  
Stop  
Stop  
CPUCLK (2:0)  
3
5
91.5  
96.22  
66.67  
60  
PCI  
DIVDER  
PCICLK (4:0)  
PCICLK_F  
CPU2.5_3.3#  
Control  
Logic  
SDATA  
SCLK  
FS (2:0)  
Note:REF&IOAPIC=14ꢀ318MHz  
AGP  
DIVDER  
Stop  
AGP (1:0)  
AGP_F  
PD#  
PCI_STOP#  
CPU_STOP#  
SDRAM_STOP#  
AGP-STOP#  
MODE  
2
Config.  
Reg.  
Power Groups  
Analog  
Digital  
VDDF  
VDDA  
VDDPCI  
VDDSDR  
VDDAGP  
SDRAM (12:0)  
BUFFERIN  
13  
Pentium is a trademark of Intel Corporation  
I2C is a trademark of Philips Corporation  
ICS reserves the right to make changes in the device data identified in  
this publication without further notice. ICS advises its customers to  
obtain the latest version of all device data to verify that any  
9248-131RevB7/17/00  
information being relied upon by the customer is current and accurate.  

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