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ICS951403 Datasheet(PDF) 1 Page - Renesas Technology Corp |
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ICS951403 Datasheet(HTML) 1 Page - Renesas Technology Corp |
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1 / 18 page  Integrated Circuit Systems, Inc. ICS951403 0486B—02/23/04 Block Diagram Functionality Pin Configuration 48-Pin SSOP & TSSOP Recommended Application: ATI chipset with K7 systems Output Features: • 3 differential pair open drain CPU clocks (1.5V external pull-up; up to 150MHz achieviable through I 2C) • 2 - AGPCLK @ 3.3V • 8 - PCI @3.3V, including 1 free running • 1 - 48MHz @ 3.3V • 1 - 24/48MHz @ 3.3V • 2- REF @3.3V, 14.318MHz. Features: • Programmable ouput frequency • Programmable ouput rise/fall time • Programmable group skew • Real time system reset output • Spread spectrum for EMI control typically by 7dB to 8dB, with programmable spread percentage • Watchdog timer technology to reset system if over-clocking causes malfunction • Uses external 14.318MHz crystal • Asyncronous CPU and SDRAM clocks • CPU and PCI outputs are aligned • CPU - AGP skew <500ps AMD-K7TM System Clock Chip * Internal 120K pullup resistor on indicated inputs ** Internal 240K pullup resistor on indicated inputs Power Groups VDD48, GND48 = 48MHz, PLL2 VDDREF, GNDREF= REF, X1, X2 VDD, GND = PLL Core SEL24_48# SDATA SCLK FS (2:0) PD# PCI_STOP# CPU_STOP# SPREAD# PLL2 PLL1 Spread Spectrum 48MHz 24_48MHz SDRAM_OUT PCICLK (6:0) AGP (1:0) PCICLK_F 2 7 X1 X2 XTAL OSC CPU DIVDER SDRAM DIVDER PCI DIVDER AGP DIVDER Stop Stop Control Logic Config. Reg. / 2 REF (1:0) 3 3 CPUCLKT (2:0) CPUCLKC (2:0) 0 0 0 0 100.00 100.00 33.33 66.67 50.00 0 0 0 1 100.00 133.33 33.33 66.67 50.00 0 0 1 0 100.00 150.00 30.00 60.00 50.00 0 0 1 1 100.00 66.67 33.33 66.67 50.00 0 1 0 0 133.33 133.33 33.33 66.67 50.00 0 1 0 1 125.00 100.00 31.25 62.50 50.00 0 1 1 0 124.00 124.00 31.00 62.00 46.50 0 1 1 1 133.33 100.00 33.33 66.67 50.00 1 0 0 0 112.00 112.00 33.60 67.20 56.00 1 0 0 1 150.00 150.00 30.00 60.00 50.00 1 0 1 0 111.11 166.67 33.33 66.67 55.56 1 0 1 1 110.00 165.00 33.00 66.00 55.00 1 1 0 0 166.67 166.67 33.33 66.67 55.56 1 1 0 1 90.00 90.00 30.00 60.00 45.00 1 1 1 0 48.00 48.00 32.00 64.00 48.00 1 1 1 1 45.00 60.00 30.00 60.00 45.00 PCICLK Bit 7 FS2 FS1 FS0 CPU SDRAM AGP SEL = 0 AGP SEL = 1 |
Similar Part No. - ICS951403 |
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Similar Description - ICS951403 |
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