Frequency Generator & Integrated Buffers - Integrated Circuit Systems
Description
Integrated Circuit Systems, Inc.
ICS9148-111
Frequency Generator & Integrated Buffers for PENTIUM/ProTM
Recommended Application: ALI (Aladdin V ) mobile.
Output Features: • 3 - CPUs @ 2.
5V/3.
3V, up to 100MHz.
• 3 - AGPCLK @ 3.
3V • 13 - SDRAM @ 3.
3V, up to 100MHz.
• 6 - PCI @ 3.
3V, including one free running.
• 1 - 48MHz, @ 3.
3V fixed.
• 1 - REF @ 3.
3V, 14.
318MHz.
Features: • Up to 100MHz frequency support • Support power management: CPU, PCI, AGP stop and, Power down Mode from I2C programming.
• Spread spectrum for EMI control (0 to -0.
6%, ± 0.
25%).
• Uses external 14.
318MHz crystal • FS pins for frequency select Key Specifications: • CPU – CPU: <250ps • SDRAM - SDRAM: <250ps • AGP-AGP: <250ps • PCI – PCI: <500ps • CPU-SDRAM <500ps • CPU(early)-PCI: 1-4ns, Center 2-6ns • CPU-AGP <500ps
Pin Configuration
48-Pin 300mil SSOP
* Internal Pull-up Resistor of 240K to 3.
3V on indicated inputs
Block Diagram
Functionality
CPU, PCI AGP FS2 FS1 FS0 SDRAM (MHz) (MHz) (MHz) 1 1 1 100 33.
33 66.
67 1 1 0 95.
25 31.
75 63.
50 1 0 1 83.
3 33.
30 66.
60 1 0 0 75 30.
00 60.
00 0 1 1 91.
5 30.
50 61.
00 0 1 0 96.
22 32.
07 64.
15 0 0 1 66.
8 33.
40 66.
80 0 0 0 60 30.
00 60.
00 REF, IOAPIC (MHz) 14.
318 14.
318 14.
318 14.
318 14.
318 14.
318 14.
318 14.
318
9148-111 Rev A 10/19/99 Third party brands and names are the property of their respective owners.
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 information being relied upon by the customer is current and accurate.
ICS9148-111
Pin Configuration
PIN NUMBER 1 2 3,9,16,22,27, 33,39,45 4 5 6 7 FS11, 2 8 10, 11, 12, 13 14 15 17 PCICLK0 FS21, 2 PCICLK(1:4) VDD5 BUFFERIN CPU_STOP#1 SDRAM 11 18 28, 29, 31, 32, 34, 35,37,38 20 PCI_STOP#1 SDRAM 10 SDRAM (0:9) AGP_STOP# SDRAM9 21 19,30,36 23 24 25 MODE1, 2 48MHz 26 41, 43, 44 40 42 46, 47 48 FS01, 2 CPUCLK(0:3) SDRAM12 VDDL AGP (1:2) VDD4 IN OUT IN OUT ...
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