C8051F340_0608 Datasheet, PDF (6/288 Pages) Silicon Laboratories – Full Speed USB Flash MCU Family

C8051F340/1/2/3/4/5/6/7
17.2.SMBus Configuration...................................................................................... 198
17.3.SMBus Operation ........................................................................................... 198
17.3.1.Arbitration............................................................................................... 199
17.3.2.Clock Low Extension.............................................................................. 200
17.3.3.SCL Low Timeout................................................................................... 200
17.3.4.SCL High (SMBus Free) Timeout .......................................................... 200
17.4.Using the SMBus............................................................................................ 200
17.4.1.SMBus Configuration Register............................................................... 202
17.4.2.SMB0CN Control Register ..................................................................... 205
17.4.3.Data Register ......................................................................................... 208
17.5.SMBus Transfer Modes.................................................................................. 208
17.5.1.Master Transmitter Mode ....................................................................... 208
17.5.2.Master Receiver Mode ........................................................................... 210
17.5.3.Slave Receiver Mode ............................................................................. 211
17.5.4.Slave Transmitter Mode ......................................................................... 212
17.6.SMBus Status Decoding................................................................................. 212
18. UART0.................................................................................................................... 215
18.1.Enhanced Baud Rate Generation................................................................... 216
18.2.Operational Modes ......................................................................................... 216
18.2.1.8-Bit UART ............................................................................................. 217
18.2.2.9-Bit UART ............................................................................................. 218
18.3.Multiprocessor Communications .................................................................... 218
19. UART1 (C8051F340/1/4/5 Only) ........................................................................... 223
19.1.Baud Rate Generator ..................................................................................... 224
19.2.Data Format.................................................................................................... 225
19.3.Configuration and Operation .......................................................................... 226
19.3.1.Data Transmission ................................................................................. 226
19.3.2.Data Reception ...................................................................................... 226
19.3.3.Multiprocessor Communications ............................................................ 227
20. Enhanced Serial Peripheral Interface (SPI0)...................................................... 233
20.1.Signal Descriptions......................................................................................... 234
20.1.1.Master Out, Slave In (MOSI).................................................................. 234
20.1.2.Master In, Slave Out (MISO).................................................................. 234
20.1.3.Serial Clock (SCK) ................................................................................. 234
20.1.4.Slave Select (NSS) ................................................................................ 234
20.2.SPI0 Master Mode Operation ......................................................................... 235
20.3.SPI0 Slave Mode Operation ........................................................................... 237
20.4.SPI0 Interrupt Sources ................................................................................... 237
20.5.Serial Clock Timing......................................................................................... 238
20.6.SPI Special Function Registers ...................................................................... 240
21. Timers.................................................................................................................... 247
21.1.Timer 0 and Timer 1 ....................................................................................... 247
21.1.1.Mode 0: 13-bit Counter/Timer ................................................................ 247
21.1.2.Mode 1: 16-bit Counter/Timer ................................................................ 248
21.1.3.Mode 2: 8-bit Counter/Timer with Auto-Reload...................................... 249
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Rev. 1.0