W83195BR-S中文資料華邦電子數(shù)據(jù)手冊PDF規(guī)格書

GENERAL DESCRIPTION

The W83195BR-S is a Clock Synthesizer for Intel 815 Solano chipset. W83195BR-S provides all clocks required for high-speed RISC or CISC microprocessor and also provides 64 different frequencies of CPU, SDRAM, PCI, 3V66, IOAPIC clocks frequency setting. All clocks are externally selectable with smooth transitions.

PRODUCT FEATURES

? 2 CPU clocks

? 3 3V66 for chipset and AGP clocks

? 12 SDRAM clocks for 3 DIMMs

? 8 PCI synchronous clocks.

? Optional single or mixed supply:

(VddR = VddP=VddS = Vdd48 = Vdd3 = 3.3V, VddLAPIC=VddLCPU=2.5V)

? Skew form CPU to PCI clock -1 to 4 ns, center 2.6 ns

? Smooth frequency switch with selections from 66.8 to 200 MHz

? I2C 2-Wire serial interface and I2C read back

? 0.25 and 0.5 center type spread spectrum

? Programmable registers to enable/stop each output and select modes

(mode as Tri-state or Normal )

? Two 48 MHz pins for USB

? 24 MHz for super I/O

? 56-pin SSOP package