This Circuit Analysis Report examines the circuitry inside of the Phison PS2551-50F USB storage controller chip. This circuit analysis report presents the following functional blocks of the device: Negative Gm Oscillator, High Frequency Divide By 2, Differential to Single-Ended Converter, Divide By 4, Fuse Program and Read, Data Select., Load Register, 8 Stage Ripple Counter, Pulse Generator and Count Re-Read, One Shot Power-Up Timer, and Schmitt Trigger.