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ICS950223 bảng dữ liệu(PDF) 1 Page - Integrated Circuit Systems |
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ICS950223 bảng dữ liệu(HTML) 1 Page - Integrated Circuit Systems |
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1 / 24 page  Integrated Circuit Systems, Inc. ICS950223 0496C—05/06/05 Block Diagram Pin Configuration 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 I 2C 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 Programmable Timing Control Hub™ for P4™ Frequency Table PLL2 PLL1 Spread Spectrum 48MHz PCICLK (9:0) 3V66 (2:0) 24_48MHz X1 X2 XTAL OSC CPU DIVDER PCI DIVDER 3V66 DIVDER PD# MULTSEL(1:0) SDATA SCLK Vtt_PWRGD# SEL 48_24# SEL 66_48# FS (4:0) I REF RESET# Control Logic Config. Reg. REF (1:0) 3 10 4 3 CPUCLKT (2:0) CPUCLKC (2:0) / 2 3V66 DIVDER 3V66_48MHz *MULTSEL1/REF1 1 48 REF0/MULTSEL0** VDDREF 2 47 GNDREF X1 3 46 VDDCPU X2 4 45 CPUCLKT2 GND 5 44 CPUCLKC2 *FS2/PCICLK0 6 43 GNDCPU *FS3/PCICLK1 7 42 PD#* **SEL48_24#/PCICLK2 8 41 CPUCLKT0 VDDPCI 9 40 CPUCLKC0 *FS4/PCICLK3 10 39 VDDCPU PCICLK4 11 38 CPUCLKT1 PCICLK5 12 37 CPUCLKC1 GND 13 36 GNDCPU PCICLK6 14 35 IREF PCICLK7 15 34 AVDD PCICLK8 16 33 GND PCICLK9 17 32 VDD3V66 VDDPCI 18 31 3V66_0 Vttpwr_GD# 19 30 3V66_1 RESET# 20 29 GND GND 21 28 3V66_2 ~*FS0/48MHz 22 27 3V66_3_48MHz/Sel66_48#** *FS1/24_48MHz 23 26 SCLK AVDD4824 25SDATA 48-SSOP * Internal Pull-Up Resistor ** Internal Pull-Down Resistor ~ This output has 2X drive strength Bit4 Bit3 Bit2 Bit1 Bit0 CPU 3V66 PCI FS4FS3 FS2FS1 FS0 MHz MHz MHz 0 0000 102.00 68.00 34.00 0 0001 105.00 70.00 35.00 0 0010 108.00 72.00 36.00 0 0011 111.00 74.00 37.00 0 0100 114.00 76.00 38.00 0 0101 117.00 78.00 39.00 0 0110 120.00 80.00 40.00 0 0111 123.00 82.00 41.00 0 1000 126.00 72.00 36.00 0 1001 130.00 74.29 37.14 0 1010 136.00 68.00 34.00 0 1011 140.00 70.00 35.00 0 1100 144.00 72.00 36.00 0 1101 148.00 74.00 37.00 0 1110 152.00 76.00 38.00 0 1111 156.00 78.00 39.00 1 0000 160.00 80.00 40.00 1 0001 164.00 82.00 41.00 1 0010 166.60 66.64 33.32 1 0011 170.00 68.00 34.00 1 0100 175.00 70.00 35.00 1 0101 180.00 72.00 36.00 1 0110 185.00 74.00 37.00 1 0111 190.00 76.00 38.00 1 1000 66.80 66.80 33.40 1 1001 100.20 66.80 33.40 1 1010 133.60 66.80 33.40 1 1011 200.40 66.80 33.40 1 1100 66.67 66.67 33.34 1 1101 100.00 66.67 33.33 1 1110 200.00 66.67 33.33 1 1111 133.33 66.67 33.33 |
Số phần tương tự - ICS950223 |
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Mô tả tương tự - ICS950223 |
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