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ICS952906A Datasheet(PDF) 1 Page - Integrated Circuit Systems |
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ICS952906A Datasheet(HTML) 1 Page - Integrated Circuit Systems |
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1 / 23 page  Integrated Circuit Systems, Inc. ICS952906A 1236A—08/06/07 Recommended Application: VIA VN800/CN700/P4M800 style chipset for P4 processor Output Features: • 3 - 0.7V current-mode differential CPU pairs • 10 - PCI, 3 free running, 33MHz • 2 - REF, 14.318MHz • 3 - 3V66, 66.66MHz • 1 - 48MHz • 1 - 24/48MHz • 2 - 25MHz @ 2.5V Key Specifications: • CPU/SRC outputs cycle-cycle jitter < 125ps • 3V66 outputs cycle-cycle jitter < 250ps • PCI outputs cycle-cycle jitter < 250ps • CPU - AGP skew < +/- 350ps • AGP-PCI skew between 1~3.5ns Programmable Timing Control Hub™ for Next Gen P4™ processor Features/Benefits: • Programmable output frequency. • Programmable asynchronous 3V66&PCI frequency. • Programmable output divider ratios. • Programmable output skew. • Programmable spread percentage for EMI control. • Watchdog timer technology to reset system if system malfunctions. • Programmable watch dog safe frequency. • Support I2C Index read/write and block read/write operations. • Uses external 14.318MHz reference input. 48-pin SSOP & TSSOP *FS1/REF0 1 48 VDDA **FS0/REF1 2 47 GND VDDREF 3 46 IREF X1 4 45 CPUCLKT_ITP/(PCI_STOP#) X2 5 44 CPUCLKC_ITP/(CPU_STOP#) GND 6 43 GND **FS2/PCICLK_F0 7 42 CPUCLKT1 **FS4/PCICLK_F1 8 41 CPUCLKC1 PCICLK_F2 9 40 VDDCPU VDDPCI 10 39 CPUCLKT0 GND 11 38 CPUCLKC0 **MODE/PCICLK0 12 37 GND PCICLK1 13 36 25Mhz_0 PCICLK2 14 35 25Mhz_1 PCICLK3 15 34 VDD2.5 PCICLK4 16 33 VttPWR_GD/PD# VDDPCI 17 32 SDATA GND 18 31 SCLK PCICLK5 19 30 Reset# PCICLK6 20 29 3V66_0 **FS3/48MHz 21 28 GND **Sel24_48#/24_48MHz 22 27 VDD3V66 GND 23 26 3V66_1 VDD48 24 25 3V66_2 * This pin have 120K pull-up to VDD ** This pin have 120K pull-down to GND Bit4 Bit3 Bit2 Bit1 Bit0 CPU AGP PCI FS4FS3 FS2FS1 FS0 MHz MHz MHz 000 00 100.00 66.67 33.33 000 01 200.00 66.67 33.33 000 10 133.33 66.67 33.33 000 11 166.67 66.67 33.33 001 00 200.00 66.67 33.33 001 01 400.00 66.67 33.33 001 10 266.67 66.67 33.33 001 11 333.33 66.67 33.33 010 00 100.99 67.33 33.66 010 01 201.98 67.33 33.66 010 10 134.65 67.33 33.66 010 11 168.31 67.32 33.66 01 1 00 115.00 76.67 38.33 011 01 230.00 76.67 38.33 011 10 153.33 76.66 38.33 011 11 191.67 76.67 38.33 1 00 00 100.00 66.66 33.33 100 01 200.00 66.66 33.33 100 10 133.33 66.66 33.33 100 11 166.67 71.43 35.71 1 01 00 200.00 66.66 33.33 101 01 400.00 66.66 33.33 101 10 266.67 66.66 33.33 101 11 333.33 66.66 33.33 110 00 105.00 69.99 35.00 110 01 210.00 69.99 35.00 110 10 140.00 69.99 35.00 110 11 175.00 69.99 35.00 11 1 00 110.00 73.33 36.66 111 01 220.00 73.33 36.66 111 10 146.66 73.33 36.66 111 11 183.34 73.33 36.66 Functionality Pin Configuration |
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