C8051F850-C-GM Datasheet, PDF (5/328 Pages) Silicon Laboratories – Low-Cost 8-bit MCU Family with up to 8 kB of Flash

14.8.Voltage and Ground Reference Options90
14.8.1.External Voltage Reference90
14.8.2.Internal Voltage Reference90
14.8.3.Analog Ground Reference90
14.9.Temperature Sensor91
14.9.1.Calibration91
14.10.ADC Control Registers92
15. CIP-51 Microcontroller Core106
15.1.Performance106
15.2.Programming and Debugging Support107
15.3.Instruction Set107
15.3.1.Instruction and CPU Timing107
15.4.CPU Core Registers112
16. Clock Sources and Selection (HFOSC0, LFOSC0, and EXTCLK)118
16.1.Programmable High-Frequency Oscillator118
16.2.Programmable Low-Frequency Oscillator118
16.2.1.Calibrating the Internal L-F Oscillator118
16.3.External Clock118
16.4.Clock Selection119
16.5.High Frequency Oscillator Control Registers120
16.6.Low Frequency Oscillator Control Registers121
16.7.Clock Selection Control Registers122
17. Comparators (CMP0 and CMP1)123
17.1.System Connectivity123
17.2.Functional Description126
17.3.Comparator Control Registers127
18. Cyclic Redundancy Check Unit (CRC0)133
18.1.CRC Algorithm133
18.2.Preparing for a CRC Calculation135
18.3.Performing a CRC Calculation135
18.4.Accessing the CRC0 Result135
18.5.CRC0 Bit Reverse Feature135
18.6.CRC Control Registers136
19. External Interrupts (INT0 and INT1)142
19.1.External Interrupt Control Registers143
20. Programmable Counter Array (PCA0)145
20.1.PCA Counter/Timer146
20.2.PCA0 Interrupt Sources146
20.3.Capture/Compare Modules147
20.3.1.Output Polarity147
20.3.2.Edge-Triggered Capture Mode148
20.3.3.Software Timer (Compare) Mode149
20.3.4.High-Speed Output Mode150
20.3.5.Frequency Output Mode151
20.4.PWM Waveform Generation152
Rev. 1.0
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