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零件编号 | W83193R-01 | ||
描述 | 83.MHZ 3-DIMM CLOCK | ||
制造商 | Winbond | ||
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1 Page
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
W83193R-01
PRELIMINARY
7.3.2 Register 1 : CPU , 48/24 MHz Clock Register (1 = enable, 0 = Stopped)
Bit @PowerUp Pin
Description
7 1 26 48MHz (Active / Inactive)
6 1 25 24 MHz (Active / Inactive)
5 1 - 0 - test mode, 1 - normal mode
4 X - Reserved
3 1 40 CPUCLK3 (Active / Inactive)
2 1 41 CPUCLK2 (Active / Inactive)
1 1 43 CPUCLK1 (Active / Inactive)
0 1 44 CPUCLK0 (Active / Inactive)
7.3.3 Register 2: PCI Clock Register (1 = enable, 0 = Stopped)
Bit @PowerUp Pin
Description
7 x - Reserved
6 1 7 PCICLK_F / FS1 (Active / Inactive)
5 1 15 PCICLK5 / PCI_STOP# (Active / Inactive)
4 1 13 PCICLK4 (Active / Inactive)
3 1 12 PCICLK3 (Active / Inactive)
2 1 11 PCICLK2 (Active / Inactive)
1 1 10 PCICLk1/FTS (Active / Inactive)
0 1 8 PCICLK0 / FS2 (Active / Inactive)
7.3.4 Register 3: SDRAM Clock Register ( 1 = enable, 0 = Stopped )
Bit @PowerUp Pin
Description
7 1 28 SDRAM7 (Active / Inactive)
6 1 29 SDRAM6 (Active / Inactive)
5 1 31 SDRAM5 (Active / Inactive)
4 1 32 SDRAM4 (Active / Inactive)
3 1 34 SDRAM3 (Active / Inactive)
2 1 35 SDRAM2 (Active / Inactive)
1 1 37 SDRAM1 (Active / Inactive)
0 1 38 SDRAM0 (Active / Inactive)
Publication Release Date: May 1998
- 8 - Revision 0.20
W83193R-01
PRELIMINARY
Vdd
Device
Pin
Series
10kΩ Terminating
Resistor
Clock
Trace
10kΩ
EMI
Reducing
Cap
Ground
Optional
Ground
Programming Header
Vdd Pad
10kΩ
Device
Pin
Ground Pad
Series
Terminating
Resistor
Clock
Trace
EMI
Reducing
Cap
Optional
Ground
- 16 -
Publication Release Date: May 1998
Revision 0.20
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页数 | 19 页 | ||
下载 | [ W83193R-01.PDF 数据手册 ] |
零件编号 | 描述 | 制造商 |
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 |
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