概要
説明
932S401 is a main clock synthesizer for CK410-generation Intel server platforms. 932S401 is driven with a 14.318MHz crystal. It generates CPU outputs up to 400MHz and PCI-Express clocks at 100 or 200 MHz. The 48 MHz USB clock is an exact 48.000 MHz clock. The 932S401 generates all clocks with less the +/- 300 ppm error.
特長
- 4 - 0.7V current-mode differential CPU pairs
- 5 - 0.7V current-mode differential SRC pair
- 4 - PCI (33MHz)
- 3 - PCICLK_F, (33MHz) free-running
- 1 - 48MHz
- 2 - REF, 14.318MHz
- CPU cycle-cycle jitter: 50ps
- SRC cycle-cycle jitter: 125ps
- PCI cycle-cycle jitter: 500ps
- CPU output skew: 50ps
- SRC output skew: 250ps
- ± 300ppm frequency accuracy on all outputs except 48MHz
- ± 100ppm frequency accuracy on 48MHz
- Supports spread spectrum modulation, 0 to -0.5% down spread
- Uses external 14.318MHz crystal and external load capacitors for low ppm synthesis error
- CPU clocks independent of SRC/PCI clocks
- D2/D3 SMBus address
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設計・開発
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