W211BH Cypress Semiconductor Corp, W211BH Datasheet
W211BH
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W211BH Summary of contents
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THIS SPEC IS OBSOLETE Spec No: 38-07174 Spec Title: W211B FTG for 440BX, VIA Apollo Pro-133, and ProMedia Sunset Owner: Rose Galindez (RGL) Replaced by: None ...
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... Internal pull-up resistors should not be relied upon for setting I/O pins HIGH. Pin function with parentheses determined by MODE pin resistor strapping. Unlike other I/O pins, input FS3 has an internal pull-down resistor. Cypress Semiconductor Corporation Document #: 38-07174 Rev. OBS Table 1. Mode Input Table Mode Table 2 ...
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Pin Definitions Pin Pin Name Pin No. Type CPU_F 44 O Free-running CPU Clock: Output voltage swing is controlled by the voltage applied to VDDQ2. See Table 2 and Table 6 for detailed frequency information. CPU1 43 O CPU Clock ...
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Overview The W211B was developed as a single-chip device to meet the clocking needs of both Intel 440BX and VIA Apollo Pro-133 core logic chip sets. In addition to the typical outputs provided by a standard FTG, the W211B adds ...
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Spread Spectrum Frequency Timing Generator The device generates a clock that is frequency modulated in order to increase the bandwidth that it occupies. By increasing the bandwidth of the fundamental and its harmonics, the ampli- tudes of the radiated electromagnetic ...
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Table 3. Serial Data Interface Control Functions Summary Control Function Clock Output Disable Any individual clock output(s) can be disabled. Disabled outputs are actively held LOW. CPU Clock Frequency Provides CPU/PCI frequency selections through Selection software. Frequency is changed in ...
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Table 5. Data Bytes 0–7 Serial Configuration Map (continued) Affected Pin Bit(s) Pin No. Pin Name 4 — — SEL_0 3 — — Hardware/Software Frequency Select 2 — — SEL_4 1 — — SEL_3 0 — — Data Byte 1 ...
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Table 5. Data Bytes 0–7 Serial Configuration Map (continued) Affected Pin Bit(s) Pin No. Pin Name 0 — — (Reserved) Data Byte 5 7 — — (Reserved) 6 — — (Reserved) 5 — — (Reserved IOAPIC Clock Output ...
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Table 6. Additional Frequency Selections through Serial Data Interface Data Bytes (continued) Input Conditions Data Byte 0, Bit Bit 2 Bit 1 Bit 6 SEL_4 SEL_3 SEL_2 ...
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Absolute Maximum Ratings Stresses greater than those listed in this table may cause permanent damage to the device. These represent a stress Parameter Voltage on any pin with respect to GND Storage Temperature STG ...
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DC Electrical Characteristics: Parameter Description Crystal Oscillator V X1 Input Threshold Voltage TH C Load Capacitance, Imposed on LOAD [6] External Crystal C X1 Input Capacitance IN,X1 Pin Capacitance/Inductance C Input Pin Capacitance IN C Output Pin Capacitance OUT L ...
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PCI Clock Outputs, PCI0:5 (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 Cycle D ...
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... Output Fall Edge Rate F t Duty Cycle D f Frequency Stabilization ST from Power-up (cold start Output Impedance o Ordering Information Ordering Code W211BH W211BHT Document #: 38-07174 Rev. OBS SDRAMIN = 66.8 MHz Min. Typ. Max. Min. Typ. Max. Min. Typ. Max 250 4.5 6.0 15 ...
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Layout Example FB .005mF Vishay ILB1206 - 300 (300Ω @ 100 MHz) or TDK ACB2012L-120 Cermaic Caps C1 & µF C2 & .005 µ ...
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... Document #: 38-07174 Rev. OBS © Cypress Semiconductor Corporation, 2003. The information contained herein is subject to change without notice. Cypress Semiconductor Corporation assumes no responsibility for the use of any circuitry other than circuitry embodied in a Cypress Semiconductor product. Nor does it convey or imply any license under patent or other rights. Cypress Semiconductor does not authorize its products for use as critical components in life-support systems where a malfunction or failure may reasonably be expected to result in significant injury to the user ...
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Document History Page Document Title: W211B FTG for 440BX, VIA Apollo Pro-133, and ProMedia Document Number: 38-07174 REV. ECN NO. Issue Date ** 110284 11/05/01 *A 122815 12/21/02 *B 129738 10/03/03 OBS 294234 See ECN Document #: 38-07174 Rev. OBS ...