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CY28326OXC Datasheet(PDF) 3 Page - SpectraLinear Inc |
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CY28326OXC Datasheet(HTML) 3 Page - SpectraLinear Inc |
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3 / 22 page  CY28326 Rev 1.0, November 20, 2006 Page 3 of 22 24 VDD48 I Power for 48MHz clock output. 25,29 AGP0/AGP2 VDDAGP O AGP Clock Output. 26 *RatioSEL /AGP1 VDDAGP I/O Power-on Bi-directional Input/output. At power up, RatioSel is the input. when the power supply voltage crosses the input threshold voltage, RatioSel state is latched and this pin becomes AGP clock output. Default pull-up. 27 VDDAGP I 3.3V power supply for AGP clock output. 28 VSSAGP I Ground for AGP clock output. 30 SRESET# O System Reset Control Output. 31 SCLK I Serial clock input. Conforms to the Philips I2C specification. 32 SDATA I/O Serial clock input. Conforms to the Philips I2C specification of a Slave Receive/Transmit device. it is an input when receiving data. It is open drain output when acknowledging or transmitting data. 33 *VTT_PWRG D/PD# I VTT_PWRGD: 3.3V LVTTL input to determine when FS[D:A], MODE, RatioSEL and 24_48_SEL inputs are valid and ready to be sampled. PD#: Invokes powerdown mode. Default Internal pull up. 34 VDDSRC I Power for 25 MHz clock output. 3.3V Power Supply. 35,36 25MHz[0:1] VDDSRC O 25 MHz Clock Output. 37 VSSSRC I Ground for 25 MHz clock output. 39,38,42,41,45,44 CPU[T/C][0:2] VDDCPU O CPU Clock outputs. 40 VDDCPU I Power for CPU clock output. 43 VSSCPU I Ground for CPU clock output. 46 IREF I Current Reference. A precision resistor is attached to this pin, which is connected to the internal current reference. 47 VSSA I Ground for output. 48 VDDA I 3.3V Power Supply for output Table 1. Frequency Table FS(D:A) FS(3:0) CPU (MHz) AGP (MHz) PCI (MHz) SATA (MHz) VCO (MHz) PLL Gear Constant (Million) 0000 110.0 73.3 36.6 25.0 660.00 25.00258122 0001 146.6 73.3 36.6 25.0 586.68 37.50387182 0010 220.0 73.3 36.6 25.0 440.00 75.00774365 0011 183.3 73.3 36.6 25.0 733.33 37.50387182 0100 233.3 66.7 33.3 25.0 466.67 75.00774365 0101 266.6 66.7 33.3 25.0 533.33 75.00774365 0110 333.3 66.7 33.3 25.0 666.67 75.00774365 0111 300.0 66.7 33.3 25.0 600.00 75.00774365 1000 100.9 67.3 33.6 25.0 807.2 18.75193591 1001 133.9 67.0 33.5 25.0 803.4 25.00258122 1010 200.9 67.0 33.5 25.0 803.6 37.50387182 1011 166.9 66.8 33.4 25.0 667.6 37.50387182 1100 100.0 66.7 33.3 25.0 800.00 18.75193591 1101 133.3 66.7 33.3 25.0 800.00 25.00258122 1110 200.0 66.7 33.3 25.0 800.00 37.50387182 1111 166.6 66.7 33.3 25.0 666.67 37.50387182 Pin Definition (continued) Pin No. Name PWR Type Description |
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