Features
- Features/Benefits
- CPU, ATIG, SB_SRC, and SRC outputs are independently programmable for frequency
- Spread Spectrum for EMI reduction
- Outputs may be disabled via SMBus
- External crystal load capacitors for maximum frequency accuracy
- Meets PCIEX Gen 2 specifications
- Meets 30kHz to 33kHz SRC modulation rate specification for USB 3.0
- Key Specifications
- CPU outputs cycle-to-cycle jitter < 85ps
- SRC outputs cycle-to-cycle jitter < 125ps
- ATIG outputs cycle-to-cycle jitter < 125ps
- ± 300ppm frequency accuracy on CPU, SRC, and ATIG clocks
Description
The 9LPRS477 is a main clock synthesizer chip that provides all clocks required for ATI RD7xx-based systems using AMD processors. An SMBus interface allows full control of the device.