W83194R-17A中文資料華邦電子數(shù)據(jù)手冊PDF規(guī)格書

GENERAL DESCRIPTION

The W83194R-17/-17A is a Clock Synthesizer which provides all clocks required for high-speed RISC or CISC microprocessor such as Intel PentiumII, PentiumPro , AMD or Cyrix. Eight different frequency of CPU, AGP and PCI clocks are externally selectable with smooth transitions. The W83194R-17/-17A provides AGP clocks especially for clone chipset. The highest CPU frequency provided by the W83194R-17 is up to 100MHz, but the one of W83194R-17A is up to 133MHz.

The W83193R-17/-17A 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 to reduce EMI.

PRODUCT FEATURES

· Supports Pentium?, Pentium? Pro, Pentium? II, AMD and Cyrix CPUs with I2C.

· 4 CPU clocks

· 12 SDRAM clocks for 3 DIMMs

· Two AGP clocks

· 6 PCI synchronous clocks.

· Optional single or mixed supply:

(Vdd = Vddq3 = Vddq2 = Vddq2b = 3.3V) or (Vdd =Vddq2 = Vddq3 = 3.3V, Vddq2b = 2.5V)

· Skew form CPU to PCI clock -1 to 4 ns, center 2.6 ns, AGP to CPU sync. skew 0 ns (250 ps)

· Smooth frequency switch with selections from 60 MHz to 133 MHz CPU

· I2C 2-Wire serial interface and I2C read back

· ?ó0.5 or ?ó1.5 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