Silicon Laboratories C8051F344, C8051F347 Oscillators 135, Port Input/Output 147, SMBus 193

C8051F340/1/2/3/4/5/6/7
14.Oscillators	135
14.1.Programmable Internal High-Frequency(H-F) Oscillator	136
14.1.1.Internal H-F Oscillator Suspend Mode	136
14.2.Programmable Internal Low-Frequency(L-F) Oscillator	137
14.2.1.Calibrating the Internal L-F Oscillator	137
14.3.External Oscillator Drive Circuit	139
14.3.1.Clocking Timers Directly Through the External Oscillator	139
14.3.2.External Crystal Example	139
14.3.3.External RC Example	140
14.3.4.External Capacitor Example	140
14.4.4x Clock Multiplier	142
14.5.System and USB Clock Selection	143
14.5.1.System Clock Selection	143
14.5.2.USB Clock Selection	143
15. Port Input/Output	147
15.1.Priority Crossbar Decoder	149
15.2.Port I/O Initialization	151
15.3.General Purpose Port I/O	154
16.Universal Serial Bus Controller (USB0)	163
16.1.Endpoint Addressing	164
16.2.USB Transceiver	164
16.3.USB Register Access	166
16.4.USB Clock Configuration	170
16.5.FIFO Management	171
16.5.1.FIFO Split Mode	171
16.5.2.FIFO Double Buffering	172
16.5.3.FIFO Access	172
16.6.Function Addressing	173
16.7.Function Configuration and Control	173
16.8.Interrupts	176
16.9.The Serial Interface Engine	180
16.10.Endpoint0	180
16.10.1.Endpoint0 SETUP Transactions	181
16.10.2.Endpoint0 IN Transactions	181
16.10.3.Endpoint0 OUT Transactions	182
16.11.Configuring Endpoints1-3	184
16.12.Controlling Endpoints1-3 IN	184
16.12.1.Endpoints1-3 IN Interrupt or Bulk Mode	184
16.12.2.Endpoints1-3 IN Isochronous Mode	185
16.13.Controlling Endpoints1-3 OUT	187
16.13.1.Endpoints1-3 OUT Interrupt or Bulk Mode	187
16.13.2.Endpoints1-3 OUT Isochronous Mode	188
17.SMBus	193
17.1.Supporting Documents	194
17.2.SMBus Configuration	194

Rev. 0.5 5