W83193R-04A中文資料華邦電子數(shù)據(jù)手冊(cè)PDF規(guī)格書(shū)

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.

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