W83194BR-703 Просмотр технического описания (PDF) - Winbond
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W83194BR-703 Datasheet PDF : 28 Pages
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W83194BR-703/W83194BG-703
1. GENERAL DESCRIPTION
The W83194BR-703 is a Clock Synthesizer for SIS 741 chipset with 964 South Bridge. W83194BR-
703 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, support two ZCLK
clock and one pair current mode differential SRC clock outputs; all clocks are externally selectable
with smooth transitions.
The W83194BR-703 provides I2C serial bus interface to program the registers to enable or disable
each clock outputs and provides -0.5% and +/-0.25% center type spread spectrum or programmable
S.S.T. scale to reduce EMI.
The W83194BR-703 also has watchdog timer to support auto-reset when systems hanging caused by
improper frequency setting.
The W83194BR-703 accepts a 14.318 MHz reference crystal as its input and runs on a 3.3V supply.
2. PRODUCT FEATURES
• 1 3.3V open drain Differential pairs clock outputs for CPU
• 1 3.3V open drain singled-ended clock output for chipset host bus.
• 1 pair 3.3V current mode differential SRC clock.
• 2 3.3V ZCLK clock outputs
• 2 AGP clock outputs
• 8 PCI synchronous clocks
• 2 2.5V IOAPIC clock outputs
• 1 24_48Mhz clock output for super I/O.
• 1 12_48 MHz clock output for USB.
• 3 14.318MHz REF clock outputs.
• ZCLK/AGP/PCI clock out supports synchronous and asynchronous mode
• Smooth frequency switch with selections from 100 to 218MHz
• 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
• Programmable clock outputs Skew control
• 48-pin SSOP package
Publication Release Date: Jan. 2006
-1-
Revision 0.8
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