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W215B Datasheet(PDF) 1 Page - Cypress Semiconductor |
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W215B Datasheet(HTML) 1 Page - Cypress Semiconductor |
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1 / 14 page  PRELIMINARY Notebook PC System Frequency Generator for K6 Processors W215B Cypress Semiconductor Corporation • 3901 North First Street • San Jose • CA 95134 • 408-943-2600 Document #: 38-07222 Rev. *A* Revised December 15, 2002 Features • Generates system clocks for CPU, IOAPIC, SDRAM, PCI, USB plus 14.318 MHz (REF0:1) • MODE input pin selects optional power management input control pins (reconfigures pins 26 and 27) • Two fixed outputs separately selectable as 24-MHz or 48-MHz (default = 48-MHz) •VDDQ3 = 3.3V±5%, VDDQ2 = 3.3V±5% • Uses external 14.318-MHz crystal • Available in 48-pin TSSOP (6.1-mm) • 10 Ω CPU output impedance Table 1. Pin Selectable Frequency 95/100_SEL CPU, SDRAM Clocks (MHz) PCI Clocks 095.0 CPU/3 1 100.0 CPU/3 Pin Configuration Block Diagram VDDQ3 REF0 VDDQ2 IOAPIC CPU0 CPU1 CPU2 CPU3 SDRAM0 SDRAM1 SDRAM2 SDRAM3 SDRAM4 SDRAM5 SDRAM6/CPUSTOP# SDRAM7/PCISTOP# PCI_F PCI0 XTAL PLL Ref Freq PLL 1 95/100_SEL MODE X2 X1 REF1 VDDQ3 Stop Output Control Stop Output Control PCI1 PWR_DWN# Power Down Control PCI2 PCI3 PCI4 PCI5 48/24MHZ 48/24MHZ PLL2 OSC I/O Control VDDQ2 REF1 REF0 GND X1 X2 MODE VDDQ3 PCI_F PCI0 GND PCI1 PCI2 PCI3 PCI4 VDDQ3 PCI5 GND 95/100_SEL Reserved Reserved VDDQ3 48/24MHZ 48/24MHZ GND VDDQ3 CPU_2.5# VDDQ2 IOAPIC PWR_DWN# GND CPU0 CPU1 VDDQ2 CPU2 CPU3 GND SDRAM0 SDRAM1 VDDQ3 SDRAM2 SDRAM3 GND SDRAM4 SDRAM5 VDDQ3 SDRAM6/CPU_STOP# SDRAM7/PCI_STOP# VDDQ3 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 CPU_2.5# |
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