|
|
Numéro de référence | W83193R-02 | ||
Description | 83.3 MHZ 3-DIMM CLOCK | ||
Fabricant | Winbond | ||
Logo | |||
1 Page
Preliminary W83193R-02/-04/-04A
83.3 MHZ 3-DIMM CLOCK
1.0 GENERAL DESCRIPTION
The W83193R-02/-04/-04A is a Main board Clock Synthesizer which provides all clocks required for
high-speed RISC or CISC microprocessor such as Intel PentiumPro, PentiumII, AMD or Cyrix. Eight
different frequency of CPU and PCI clocks are externally selectable with smooth transitions.
The W83193R-02/-04/-04A also provides I2C serial bus interface to program the registers to enable
or disable each clock outputs and choose the 0.5% or 1.5% center type spread spectrum.
The W83193R-02/-04/-04A 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 1V /nS slew rate
into 30 pF loads. CPU CLOCK outputs typically provide better than 1V /nS slew rate into 20 pF loads
as maintaining 50 ±5% duty cycle. The fixed frequency outputs as REF, 24 MHz, and 48 MHz provide
better than 0.5V /nS slew rate.
2.0 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 = VDDq2b = 3.3V) or (VDD = VDDq3 = 3.3V, VDDq2 = VDD2b = 2.5V)
• < 250 pS skew among CPU and SDRAM clocks.
• < 250 pS skew among PCI clocks.
• Smooth frequency switch with selections from 50 MHz to 83.3 MHz CPU. (W83193R-04)
• Smooth frequency switch with selections from 50 MHz to 112 MHz CPU. (W83193R-04A)
• I2C 2-Wire serial interface and I2C read back.
• 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
• Packaged in 48-pin SSOP
Publication Release Date: April 1999
- 1 - Revision A1
|
|||
Pages | Pages 18 | ||
Télécharger | [ W83193R-02 ] |
No | Description détaillée | Fabricant |
W83193R-01 | 83.MHZ 3-DIMM CLOCK | Winbond |
W83193R-02 | 83.3 MHZ 3-DIMM CLOCK | Winbond |
W83193R-04 | 83.3 MHZ 3-DIMM CLOCK | Winbond |
W83193R-04A | 83.3 MHZ 3-DIMM CLOCK | Winbond |
US18650VTC5A | Lithium-Ion Battery | Sony |
TSPC106 | PCI Bus Bridge Memory Controller | ATMEL |
TP9380 | NPN SILICON RF POWER TRANSISTOR | Advanced Semiconductor |
www.DataSheetWiki.com | 2020 | Contactez-nous | Recherche |