
Winbond
GENERAL DESCRIPTION
The W83194BR-PT is a Clock Synthesizer for VIA PT chipset. W83194BR-PT provides all clocks required for high-speed microprocessor and provides step-less frequency programming and 32 different frequencies of CPU, PCI, and AGP clocks setting. All clocks are externally selectable with smooth transitions.
PRODUCT FEATURES
• 2 Differential pairs of CPU clock outputs
• 1 Differential pairs push pull of CPU_CS clock outputs
• 3 AGP clock outputs
• 9 PCI synchronous clocks
• 24_48Mhz clock output for super I/O.
• 48 MHz clock output for USB.
• 2 IOAPIC clock outputs.
• 1 REF clock output.
• Skew form CPU to PCI clock 1 to 4 ns, center 2.6 ns
• Smooth frequency switch with selections from 100 to 200MHz
• Step-less frequency programming
• I2C 2-Wire serial interface and support byte read/write and block read/write.
• -0.5% and +/- 0.25% center type spread spectrum
• Programmable S.S.T. scale to reduce EMI
• Programmable registers to enable/stop each output and select modes
• Watch Dog Timer and RESET# output pins
• 48-pin SSOP package