W83115RG-BW/W83115WG-BW
STEPLESS FOR INTEL BROADWATER CLOCK GENERATOR
1. GENERAL DESCRIPTION
The W83115RG-BW/W83115WG-BW is a Clock Synthesizer for Intel Broadwater series chipsets.
W83115RG-BW/ W83115WG-BW provides all clocks required for the high-speed microprocessor and
provides step-less frequency programming and 32 different frequencies of CPU, PCI, and SRC clocks
setting, support SATA and DOT clock outputs, all clocks are externally selectable with smooth
transitions.
The W83115RG-BW/W83115WG-BW provides I2C serial bus interface to program the registers to
enable or disable each clock outputs and provides -0.5% down type spread spectrum or
programmable S.S.T. scale to reduce EMI.
The W83115RG-BW/W83115WG-BW accepts a 14.318 MHz reference crystal as its input and runs
on a 3.3V supply.
2. PRODUCT FEATURES
• 2 pair push-pull Differential clock outputs for CPU.
• 7 pair push-pull Differential clock outputs for SRC.
• 1 pair push-pull Differential clock outputs for CPU/SRC selectable.
• 1 pair push-pull Differential clock outputs for DOT/SRC selectable.
• 5 PCI clock outputs, 1 free running.
• 1 48 MHz clock output for USB.
• 1 14.318MHz REF clock output.
• Smooth frequency switch with selections from 100 to 400MHz.
• Step-less frequency programming.
• I2C 2-wire serial interface and support byte read/write and block read/write.
• -0.5% down type spread spectrum in H/W and software select mode.
• Programmable S.S.T. scale to reduce EMI in M/N mode.
• Programmable registers to enable/disable each output and select modes.
• Programmable clock outputs slew rate control and skew control.
• 56 pins TSSOP/SSOP package.
Publication Release Date: December, 2006
- 1 -
Revision 1.0
WINBOND [ WINBOND ]
