Silicon Laboratories C8051F12 Series Manual page 7

C8051F120/1/2/3/4/5/6/7 C8051F130/1/2/3
20.2.SPI0 Master Mode Operation ......................................................................... 275
20.3.SPI0 Slave Mode Operation ........................................................................... 277
20.4.SPI0 Interrupt Sources ................................................................................... 277
20.5.Serial Clock Timing......................................................................................... 278
20.6.SPI Special Function Registers ...................................................................... 280
21. UART0.................................................................................................................... 287
21.1.UART0 Operational Modes ............................................................................ 288
21.1.1.Mode 0: Synchronous Mode .................................................................. 288
21.1.2.Mode 1: 8-Bit UART, Variable Baud Rate.............................................. 289
21.1.3.Mode 2: 9-Bit UART, Fixed Baud Rate .................................................. 291
21.1.4.Mode 3: 9-Bit UART, Variable Baud Rate.............................................. 292
21.2.Multiprocessor Communications .................................................................... 293
21.2.1.Configuration of a Masked Address ....................................................... 293
21.2.2.Broadcast Addressing ............................................................................ 293
21.3.Frame and Transmission Error Detection....................................................... 294
22. UART1.................................................................................................................... 299
22.1.Enhanced Baud Rate Generation................................................................... 300
22.2.Operational Modes ......................................................................................... 301
22.2.1.8-Bit UART ............................................................................................. 301
22.2.2.9-Bit UART ............................................................................................. 302
22.3.Multiprocessor Communications .................................................................... 303
23. Timers.................................................................................................................... 309
23.1.Timer 0 and Timer 1 ....................................................................................... 309
23.1.1.Mode 0: 13-bit Counter/Timer ................................................................ 309
23.1.2.Mode 1: 16-bit Counter/Timer ................................................................ 311
23.1.3.Mode 2: 8-bit Counter/Timer with Auto-Reload...................................... 311
23.1.4.Mode 3: Two 8-bit Counter/Timers (Timer 0 Only)................................. 312
23.2.Timer 2, Timer 3, and Timer 4 ........................................................................ 317
23.2.1.Configuring Timer 2, 3, and 4 to Count Down........................................ 317
23.2.2.Capture Mode ........................................................................................ 318
23.2.3.Auto-Reload Mode ................................................................................. 319
23.2.4.Toggle Output Mode (Timer 2 and Timer 4 Only) .................................. 320
24. Programmable Counter Array ............................................................................. 325
24.1.PCA Counter/Timer ........................................................................................ 326
24.2.Capture/Compare Modules ............................................................................ 328
24.2.1.Edge-triggered Capture Mode................................................................ 329
24.2.2.Software Timer (Compare) Mode........................................................... 330
24.2.3.High Speed Output Mode....................................................................... 331
24.2.4.Frequency Output Mode ........................................................................ 332
24.2.5.8-Bit Pulse Width Modulator Mode......................................................... 333
24.2.6.16-Bit Pulse Width Modulator Mode....................................................... 334
24.3.Register Descriptions for PCA0...................................................................... 335
Rev. 1.4 7