C8051F860-B-IU datasheet(5/290 Pages) SILABS

Part #	C8051F860-B-IU

Description	Low-Cost 8-bit MCU Family with up to 8 kB of Flash

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Manufacturer	SILABS [Silicon Laboratories]

Direct Link	http://www.silabs.com

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C8051F85x/86x

Preliminary Rev 0.6

5

20.6.PCA Control Registers...............................................................................................160

21.Port I/O (Port 0, Port 1, Port 2, Crossbar, and Port Match) ..........................................178

21.1.General Port I/O Initialization.....................................................................................179

21.2.Assigning Port I/O Pins to Analog and Digital Functions ...........................................180

21.2.1.Assigning Port I/O Pins to Analog Functions.....................................................180

21.2.2.Assigning Port I/O Pins to Digital Functions......................................................180

21.2.3.Assigning Port I/O Pins to Fixed Digital Functions ............................................181

21.3.Priority Crossbar Decoder..........................................................................................182

21.4.Port I/O Modes of Operation......................................................................................184

21.4.1.Configuring Port Pins For Analog Modes ..........................................................184

21.4.2.Configuring Port Pins For Digital Modes ...........................................................184

21.4.3.Port Drive Strength............................................................................................184

21.5.Port Match..................................................................................................................185

21.6.Direct Read/Write Access to Port I/O Pins.................................................................185

21.7.Port I/O and Pin Configuration Control Registers ......................................................186

22.Reset Sources and Supply Monitor ...............................................................................204

22.1.Power-On Reset ........................................................................................................205

22.2.Power-Fail Reset / Supply Monitor ............................................................................206

22.3.Enabling the VDD Monitor .........................................................................................206

22.4.External Reset ...........................................................................................................207

22.5.Missing Clock Detector Reset....................................................................................207

22.6.Comparator0 Reset....................................................................................................207

22.7.Watchdog Timer Reset ..............................................................................................207

22.8.Flash Error Reset.......................................................................................................207

22.9.Software Reset ..........................................................................................................207

22.10.Reset Sources Control Registers.............................................................................208

23.Serial Peripheral Interface (SPI0) ...................................................................................214

23.1.Signal Descriptions ....................................................................................................215

23.1.1.Master Out, Slave In (MOSI) .............................................................................215

23.1.2.Master In, Slave Out (MISO) .............................................................................215

23.1.3.Serial Clock (SCK).............................................................................................215

23.1.4.Slave Select (NSS)............................................................................................215

23.2.SPI0 Master Mode Operation ....................................................................................216

23.3.SPI0 Slave Mode Operation ......................................................................................218

23.4.SPI0 Interrupt Sources...............................................................................................218

23.5.Serial Clock Phase and Polarity.................................................................................218

23.6.SPI Special Function Registers .................................................................................220

23.7.SPI Control Registers ................................................................................................224

24.System Management Bus / I2C (SMBus0) .....................................................................229

24.1.Supporting Documents ..............................................................................................230

24.2.SMBus Configuration.................................................................................................230

24.3.SMBus Operation.......................................................................................................230

24.3.1.Transmitter vs. Receiver....................................................................................231

24.3.2.Arbitration ..........................................................................................................231

24.3.3.Clock Low Extension .........................................................................................231

24.3.4.SCL Low Timeout..............................................................................................231

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