C8051F850-B-GM Datasheet, PDF (6/290 Pages) Silicon Laboratories – Low-Cost 8-bit MCU Family with up to 8 kB of Flash

C8051F85x/86x
24.3.5.SCL High (SMBus Free) Timeout...................................................................... 232
24.4.Using the SMBus ....................................................................................................... 232
24.4.1.SMBus Configuration Register ..........................................................................232
24.4.2.SMBus Pin Swap...............................................................................................234
24.4.3.SMBus Timing Control....................................................................................... 234
24.4.4.SMB0CN Control Register.................................................................................234
24.4.5.Hardware Slave Address Recognition............................................................... 236
24.4.6.Data Register..................................................................................................... 236
24.5.SMBus Transfer Modes ............................................................................................. 237
24.5.1.Write Sequence (Master)................................................................................... 237
24.5.2.Read Sequence (Master) .................................................................................. 238
24.5.3.Write Sequence (Slave)..................................................................................... 239
24.5.4.Read Sequence (Slave) .................................................................................... 240
24.6.SMBus Status Decoding ............................................................................................ 240
24.7.I2C / SMBus Control Registers .................................................................................. 245
25. Timers (Timer0, Timer1, Timer2 and Timer3) ................................................................ 252
25.1.Timer 0 and Timer 1................................................................................................... 253
25.1.1.Mode 0: 13-bit Counter/Timer............................................................................ 254
25.1.2.Mode 1: 16-bit Counter/Timer............................................................................ 254
25.1.3.Mode 2: 8-bit Counter/Timer with Auto-Reload ................................................. 255
25.1.4.Mode 3: Two 8-bit Counter/Timers (Timer 0 Only) ............................................ 256
25.2.Timer 2 and Timer 3................................................................................................... 257
25.2.1.16-bit Timer with Auto-Reload ........................................................................... 257
25.2.2.8-bit Timers with Auto-Reload ........................................................................... 258
25.2.3.Capture Mode.................................................................................................... 259
25.3.Timer Control Registers ............................................................................................. 260
26. Universal Asynchronous Receiver/Transmitter (UART0) ............................................ 278
26.1.Enhanced Baud Rate Generation .............................................................................. 278
26.2.Operational Modes..................................................................................................... 280
26.2.1.8-Bit UART ........................................................................................................ 280
26.2.2.9-Bit UART ........................................................................................................ 281
26.3.Multiprocessor Communications................................................................................ 282
26.4.UART Control Registers ............................................................................................ 284
27. Watchdog Timer (WDT0) ................................................................................................. 288
27.1.Enabling / Resetting the WDT.................................................................................... 289
27.2.Disabling the WDT ..................................................................................................... 289
27.3.Disabling the WDT Lockout ....................................................................................... 289
27.4.Setting the WDT Interval............................................................................................ 289
27.5.Watchdog Timer Control Registers............................................................................ 290
28. C2 Interface ...................................................................................................................... 292
28.1.C2 Pin Sharing........................................................................................................... 292
28.2.C2 Interface Registers ...............................................................................................293
Document Change List ......................................................................................................... 298
Contact Information .............................................................................................................. 299
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Preliminary Rev 0.6