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ICS950223

Part Number	ICS950223
Manufacturer	Integrated Circuit Systems
Description	Programmable Timing Control Hub
Published	Nov 17, 2005
Detailed Description	Integrated Circuit Systems, Inc. ICS950223 Programmable Timing Control Hub™ for P4™ Recommended Application: Brookdale...
Datasheet	ICS950223 PDF File

Overview

Integrated Circuit Systems, Inc.
ICS950223 Programmable Timing Control Hub™ for P4™ Recommended Application: Brookdale and Brookdale-G chipset with P4 processor.
Output Features: • 3 - Pairs of differential CPU clocks (differential current mode) • 3 - 3V66 @ 3.
3V • 10 - PCI @ 3.
3V • 1 - 48MHz @ 3.
3V fixed • 2 - REF @ 3.
3V, 14.
318MHz • 1 - 48_66MHz selectable @ 3.
3V fixed • 1 - 24_48MHz selectable @ 3.
3V Features/Benefits: • QuadRomTM frequency selection.
• Programmable output frequency.
• Programmable asynchronous 3V66 & PCI frequency.
• Programmable output divider ratios.
• Programmable output rise/fall time.
• Programmable output skew.
• Programmable spread percentage for EMI control.
• Watchdog timer technology to reset system if system malfunctions.
• Programmable watchdog safe frequency.
• Support I2C Index read/write and block read/write operations.
• Uses external 14.
318MHz reference input.
Key Specifications: • CPU Output Jitter <150ps • 3V66 Output Jitter <250ps • CPU Output Skew <100ps Pin Configuration *MULTSEL1/REF1 1 VDDREF 2 X1 3 X2 4 GND 5 *FS2/PCICLK0 6 *FS3/PCICLK1 7 **SEL48_24#/PCICLK2 8 VDDPCI 9 *FS4/PCICLK3 10 PCICLK4 11 PCICLK5 12 GND 13 PCICLK6 14 PCICLK7 15 PCICLK8 16 PCICLK9 17 VDDPCI 18 Vttpwr_GD# 19 RESET# 20 GND 21 ~ *FS0/48MHz 22 *FS1/24_48MHz 23 AVDD48 24 48 REF0/MULTSEL0** 47 GNDREF 46 VDDCPU 45 CPUCLKT2 44 CPUCLKC2 43 GNDCPU 42 PD#* 41 CPUCLKT0 40 CPUCLKC0 39 VDDCPU 38 CPUCLKT1 37 CPUCLKC1 36 GNDCPU 35 IREF 34 AVDD 33 GND 32 VDD3V66 31 3V66_0 30 3V66_1 29 GND 28 3V66_2 27 3V66_3_48MHz/Sel66_48#** 26 SCLK 25 SDATA 48-SSOP * Internal Pull-Up Resistor ** Internal Pull-Down Resistor ~ This output has 2X drive strength Frequency Table Bit4 FS4 0 0 0 0 0 0 0 0 0 0 Bit3 FS3 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 Bit2 FS2 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 Bit1 FS1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 Bit0 FS0 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 ...

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