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W150

Part Number	W150
Manufacturer	Cypress Semiconductor
Description	440BX AGPset Spread Spectrum Frequency Synthesizer
Published	Apr 17, 2005
Detailed Description	PRELIMINARY W150 440BX AGPset Spread Spectrum Frequency Synthesizer Features • Maximized EMI suppression using Cypress...
Datasheet	W150 PDF File

Overview

PRELIMINARY W150 440BX AGPset Spread Spectrum Frequency Synthesizer Features • Maximized EMI suppression using Cypress’s Spread Spectrum Technology • Single chip system frequency synthesizer for Intel® 440BX AGPset • Three copies of CPU output • Seven copies of PCI output • One 48-MHz output for USB / One 24-MHz for SIO • Two buffered reference outputs • Two IOAPIC outputs • 17 SDRAM outputs provide support for 4 DIMMs • Supports frequencies up to 150 MHz • I2C™ interface for programming • Power management control inputs Table 1.
Mode Input Table Mode 0 1 Table 2.
Pin Selectable Frequency Input Address FS3 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 FS2 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 FS1 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 [1] Pin 3 PCI_STOP# REF0 FS0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 CPU_F, 1:2 (MHz) 133.
3 124 150 140 105 110 115 120 100 133.
3 112 103 66.
8 83.
3 75 124 PCI_F, 0:5 (MHz) 33.
3 (CPU/4) 31 (CPU/4) 37.
5 (CPU/4) 35 (CPU/4) 35 (CPU/3) 36.
7 (CPU/3) 38.
3 (CPU/3) 40 (CPU/3) 33.
3 (CPU/3) 44.
43 (CPU/3) 37.
3 (CPU/3) 34.
3 (CPU/3) 33.
4 (CPU/2) 41.
7 (CPU/2) 37.
5 (CPU/2) 41.
3 (CPU/3) Key Specifications CPU Cycle-to-Cycle Jitter: .
250 ps CPU to CPU Output Skew: 175 ps PCI to PCI Output Skew: .
.
.
.
500 ps SDRAMIN to SDRAM0:15 Delay: .
3.
7 ns typ.
VDDQ3: .
.
.
3.
3V±5% VDDQ2: .
.
.
2.
5V±5% SDRAM0:15 (leads) to SDRAM_F Skew: .
.
.
.
0.
4 ns typ.
Logic Block Diagram VDDQ3 REF0/(PCI_STOP#) X1 X2 XTAL OSC PLL Ref Freq I/O Pin Control CLK_STOP# Pin Configuration REF1/FS2 Stop Clock Control VDDQ2 IOAPIC_F IOAPIC0 VDDQ2 CPU_F PLL 1 ÷2,3,4 Stop Clock Control CPU1 CPU2 VDDQ3 PCI_F/MODE PCI0/FS3 PCI1 PCI2 PCI3 Stop Clock Control SDATA SCLK I2C Logic PCI4 PCI5 VDDQ3 VDDQ3 REF1/FS2 REF0/(PCI_STOP#) GND X1 X2 VDD...

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