W83193R-01 Просмотр технического описания (PDF) - Winbond

Номер в каталоге

Компоненты Описание

Список матч

W83193R-01

83.MHZ 3-DIMM CLOCK

Winbond 

W83193R-01

1.0 GENERAL DESCRIPTION

83.MHZ 3-DIMM CLOCK

The W83193R-01 is a Clock Synthesizer which provides all clocks required for high-speed RISC or

CISC microprocessor such as Intel PentiumPro , AMD or Cyrix. Eight different frequency of CPU and

PCI clocks are externally selectable with smooth transitions.

The W83193R-02/-04 also provides I2C serial bus interface to program the registers to enable or

disable each clock outputs and choose the 0.6% or 1.5% center type spread spectrum.

The W83193R-01 accepts a 14.318 MHz reference crystal as its input and runs on a 3.3V supply.

High drive PCI and SDRAM CLOCK outputs typically provide greater than 1 V /ns slew rate into 30

pF loads. CPU CLOCK outputs typically provide better than 1 V /ns slew rate into 20 pF loads as

maintaining 50¡Ó 5% duty cycle. The fixed frequency outputs as REF, 24MHz, and 48 MHz provide

better than 0.5V /ns slew rate.

2.0 PRODUCT FEATURES

• Supports Pentium™, Pentium™ Pro, Pentium™ II, AMD and Cyrix CPUs with I2C.

• 4 CPU clocks.

• 12 SDRAM clocks for 3 DIMs.

• 7 PCI synchronous clocks.

• One IOAPIC clock for multiprocessor support.

• Optional single or mixed supply:

(Vdd = Vddq3 = Vddq2 = 3.3V) or (Vdd = Vddq3 = 3.3V, Vddq2 = 2.5V)

• < 250ps skew among CPU and SDRAM clocks.

• < 250ps skew among PCI clocks.

• Smooth frequency switch with selections from 50 MHz to 83.3 MHz CPU.

• I2C 2-Wire serial interface.

• 0.6% or 1.5% center type spread spectrum function to reduce EMI.

• Programmable registers to enable/stop each output and select modes.

(mode as Tri-state, or Normal )

• MODE pin for power Management.

• 48 MHz for USB.

• 24 MHz for super I/O.

• 48-pin SSOP package.

Publication Release Date: May 1998

-1-

Revision 0.20

Share Link: