C8051F99x-C8051F98x
22.3.SMBus Operation ........................................................................................... 235
22.3.1.Transmitter vs. Receiver ........................................................................ 235
22.3.2.Arbitration............................................................................................... 235
22.3.3.Clock Low Extension.............................................................................. 236
22.3.4.SCL Low Timeout................................................................................... 236
22.3.5.SCL High (SMBus Free) Timeout .......................................................... 236
22.4.Using the SMBus............................................................................................ 237
22.4.1.SMBus Configuration Register............................................................... 238
22.4.2.SMB0CN Control Register ..................................................................... 241
22.4.3.Hardware Slave Address Recognition ................................................... 244
22.4.4.Data Register ......................................................................................... 246
22.5.SMBus Transfer Modes.................................................................................. 247
22.5.1.Write Sequence (Master) ....................................................................... 247
22.5.2.Read Sequence (Master)....................................................................... 248
22.5.3.Write Sequence (Slave) ......................................................................... 249
22.5.4.Read Sequence (Slave)......................................................................... 250
22.6.SMBus Status Decoding................................................................................. 250
23.UART0.................................................................................................................... 255
23.1.Enhanced Baud Rate Generation................................................................... 256
23.2.Operational Modes ......................................................................................... 257
23.2.1.8-Bit UART............................................................................................. 257
23.2.2.9-Bit UART............................................................................................. 258
23.3.Multiprocessor Communications .................................................................... 258
24.Enhanced Serial Peripheral Interface (SPI0)...................................................... 263
24.1.Signal Descriptions......................................................................................... 264
24.1.1.Master Out, Slave In (MOSI).................................................................. 264
24.1.2.Master In, Slave Out (MISO).................................................................. 264
24.1.3.Serial Clock (SCK) ................................................................................. 264
24.1.4.Slave Select (NSS) ................................................................................ 264
24.2.SPI0 Master Mode Operation......................................................................... 264
24.3.SPI0 Slave Mode Operation........................................................................... 266
24.4.SPI0 Interrupt Sources ................................................................................... 267
24.5.Serial Clock Phase and Polarity ..................................................................... 267
24.6.SPI Special Function Registers...................................................................... 269
25.Timers.................................................................................................................... 276
25.1.Timer 0 and Timer 1 ....................................................................................... 278
25.1.1.Mode 0: 13-bit Counter/Timer ................................................................ 278
25.1.2.Mode 1: 16-bit Counter/Timer ................................................................ 279
25.1.3.Mode 2: 8-bit Counter/Timer with Auto-Reload...................................... 280
25.1.4.Mode 3: Two 8-bit Counter/Timers (Timer 0 Only)................................. 281
25.2.Timer 2 .......................................................................................................... 286
25.2.1.16-bit Timer with Auto-Reload................................................................ 286
25.2.2.8-bit Timers with Auto-Reload................................................................ 287
25.2.3.Comparator 0/SmaRTClock Capture Mode ........................................... 288
25.3.Timer 3 .......................................................................................................... 292
6
Rev. 1.0
SILICON [ SILICON ]
