W164G Cypress Semiconductor Corp., W164G Datasheet
W164G
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W164G Summary of contents
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Features • Maximized EMI suppression using Cypress’s Spread Spectrum technology • Reduces measured EMI by as much • programmable to 153 MHz (16 selectable frequencies) • Two skew-controlled copies of CPU output • SEL100/66# ...
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Pin Definitions Pin Pin Name No. Type CPU0:1 22, 21 PCI1 10, PCI_F 11, 4 IOAPIC 24 48MHz 13 24/48MHz 14 REF2X/SEL48# 27 SEL100/66# 16 SDATA 18 SCLOCK VDDQ3 9, 12, ...
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W164 Power-on Output Three-state Reset Timer Figure 1. Input Logic Selection Through Resistor Load Option W164 Power-on Output Three-state Reset Timer Figure 2. Input Logic Selection Through Jumper Option Serial Data Interface The W164 features a two-pin, serial data interface ...
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Table 3. Byte Writing Sequence Byte Sequence Byte Name Bit Sequence 1 Slave Address 11010010 2 Command Don’t Care Code 3 Byte Count Don’t Care 4 Data Byte 0 Don’t Care 5 Data Byte 1 6 Data Byte 2 7 ...
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Writing Data Bytes Each bit in the data bytes controls a particular device function except for the “reserved” bits, which must be written as a logic 0. Bits are written MSB (most significant bit) first, which is bit 7. Table ...
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Table 5. Additional Frequency Selections through Serial Data Interface Data Bytes Input Conditions Data Byte 3, Bit Bit 7 Bit 6 Bit 5 SEL_3 SEL_2 SEL_1 ...
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Absolute Maximum Ratings Stresses greater than those listed in this table may cause per- manent damage to the device. These represent a stress rating only. Operation of the device at these or any other conditions Parameter ...
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DC Electrical Characteristics: Parameter Description Crystal Oscillator V X1 Input Threshold Voltage TH C Load Capacitance, as seen by LOAD [7] External Crystal C X1 Input Capacitance IN,X1 Pin Capacitance/Inductance C Input Pin Capacitance IN C Output Pin Capacitance OUT ...
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PCI Clock Outputs, PCI1:6 and PCI_F (Lump Capacitance Test Load = 30 pF Parameter Description t Period P t High Time H t Low Time L t Output Rise Edge Rate R t Output Fall Edge Rate F t Duty ...
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Clock Output (Lump Capacitance Test Load = 20 pF) Parameter Description f Frequency, Actual f Deviation from 48 MHz D m/n PLL Ratio t Output Rise Edge Rate R t Output Fall Edge Rate F t Duty ...
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Package Diagram 28-Pin Small Outline Integrated Circuit (SOIC, 300 mils) Document #: 38-07169 Rev. *A © Cypress Semiconductor Corporation, 2001. The information contained herein is subject to change without notice. Cypress Semiconductor Corporation assumes no responsibility for the use of ...
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Document Title: W164 Spread Spectrum Desktop/Notebook System Frequency Generator Document Number: 38-07169 Issue REV. ECN NO. Date ** 110279 11/05/01 *A 122810 12/15/02 Document #: 38-07169 Rev. *A Orig. of Change Description of Change SZV Change from Spec number: 38-00841 ...