W83195BR/G-101

STEPLESS FOR INTEL 915/925 CHIPSETS

Publication Release Date: March 2006

- 1 -

Revision 0.7

1. GENERAL DESCRIPTION

The W83195BR/G-101 is a Clock Synthesizer for Intel P4 processors and Intel Grandsdale chipsets.

W83195BR/G-101 provides all clocks required for high-speed microprocessor and provides step-less

frequency programming, 32 different frequencies of CPU, PCI, SRC clocks setting. Simultaneously

W83194BR-101 supports SRC_SATA 100MHz clock output for SATA and DOT 96MHz clock outputs

for integrated graphic chipsets. All clocks are externally selectable with smooth transitions.

The W83195BR/G-101 programs the registers to enable or disable each clock outputs through I

serial bus interface and provides -0.5% down type spread spectrum or programmable spread

spectrum scale to reduce EMI.

The W83195BR/G-101 is driven with a 14.318 MHz reference crystal and runs on a 3.3V supply.

2. PRODUCT FEATURES

• 2 pair 0.7 V current mode Differential clock outputs for CPU

• 6 pair 0.7V current mode Differential clock outputs for SRC and SRC_SATA.

• 1 pair 0.7V current mode Differential 96MHz clock outputs for DOT.

• 6 PCI clock outputs for PCI

• 3 PCI clock free running outputs for PCI

• 1 48 MHz clock output for USB.

• 1 14.318MHz REF clock outputs.

• Step-less frequency programming

• -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/stop each output.

• Programmable clock outputs to control skew.

• Watch Dog Timer output

• 56 pin SSOP package