AMD 27 mhz crystal free download

File name 27_mhz_crystal.pdf

AMD GeodeTM SP4SC40 System Platform 27 MHz Crystal Solutions 1.0 Scope In silicon revision A3 (and earlier) of the AMD GeodeTM Rework Option #2: (TH oscillator): SC1100 processor, a known issue (issue #6.7) exists Remove the 27 MHz crystal and associated components, regarding the 27 MHz on-chip amplifier. This document dis- and add a half-size (8-pin DIP) square can oscillator. cusses rework options for the AMD GeodeTM SP4SC40 system platform boards shipped with silicon revision A3 (or Wire pin 5 of the oscillator to pin 1 (farthest from processor) earlier) of the SC1100 processor. This issue does not exist of Y1 (crystal footprint). in silicon revision B1 of the SC1100 processor. Wire pins 1 and 8 of the oscillator to pin 3 of D4 (FET) for VIO power connection. 2.0 Discussion Wire pin 4 of the oscillator to pin 2 of C122 for ground con- nection. The 27 MHz on-chip amplifier is too sensitive to the clock waveform generated by the external crystal oscillator cir- No load R87, R91, C106, and C117. cuit. Jitter of the 27 MHz clock signal can result in system Add a 0.1