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CY28RS400ZCT Datasheet(PDF) 1 Page - SpectraLinear Inc |
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CY28RS400ZCT Datasheet(HTML) 1 Page - SpectraLinear Inc |
1 / 18 page Clock Generator for ATI RS400 Chipset CY28RS400 Rev 1.0, November 22, 2006 Page 1 of 18 2200 Laurelwood Road, Santa Clara, CA 95054 Tel:(408) 855-0555 Fax:(408) 855-0550 www.SpectraLinear.com Features • Supports Intel CPU • Selectable CPU frequencies • Differential CPU clock pairs • 100 MHz differential SRC clocks • 48 MHz USB clock • 33 MHz PCI clock • Low-voltage frequency select input •I2C support with readback capabilities • Ideal Lexmark Spread Spectrum profile for maximum electromagnetic interference (EMI) reduction • 3.3V power supply • 56-pin SSOP and TSSOP packages CPU SRC PCI REF USB_48 x3 x8 x1 x 3 x 1 Block Diagram Pin Configuration Xin XOUT USB_48 VSS_48 VTT_PWRGD#/PD SCLK SDATA FSC CLKREQ#0 CLKREQ#1 SRCT5 SRCC5 VDD_SRC VSS_SRC SRCT4 SRCC4 SRCT3 SRCC3 VSS_SRC VDD_SRC SRCT2 SRCC2 SRCT1 SRCC1 VDD_REF VSS_REF SRCST0 VSS_SRC1 VSSA IREF VDDA CPUT2 CPUC2 CPUC1 VSS_CPU CPUT1 VDD_CPU CPUT0 CPUC0 CPU_STOP# PCI0/409_410 VDD_PCI REF1/FSB REF2 REF0/FSA VDD_SRC1 VSS_SRC SRCST1 SRCSC1 SRCT0 SRCC0 VSS_SRCS SRCSC0 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 32 31 30 29 VDD_REF XTAL PLL Ref Freq XOUT XIN OSC SCLK PLL1 I2C Logic VDD_48 MHz SDATA VDD_PCI Divider Network VDD_CPU FS_[C:A] REF[0:2] VTT_PWRGD# IREF PCI PLL2 CPUT[0:2], CPUC[0:2], VDD_SRC SRCT[0:5],SRCC[0:5] USB_48 CPU_STP# CLKREQ[0:1]# VDD_48 VDD_SRCS VSS_PCI 56 SSOP/TSSOP PD VDD_SRCS SRCST[0:1],SRCSC[0:1] |
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