UPD78F1146AF1-AN1-A【PDF 24/880 页】MCU 16BIT 78K0R/KX3 64-FBGA

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Sheet目录1971

User’s Manual U17854EJ9V0UD

5.4 System Clock Oscillator ............................................................................................................ 156

5.4.1 X1 oscillator.....................................................................................................................................156

5.4.2 XT1 oscillator ..................................................................................................................................156

5.4.3 Internal high-speed oscillator ..........................................................................................................159

5.4.4 Internal low-speed oscillator............................................................................................................159

5.4.5 Prescaler .........................................................................................................................................159

5.5 Clock Generator Operation ....................................................................................................... 160

5.6 Controlling Clock........................................................................................................................ 164

5.6.1 Example of controlling high-speed system clock .............................................................................164

5.6.2 Example of controlling internal high-speed oscillation clock............................................................167

5.6.3 Example of controlling subsystem clock..........................................................................................169

5.6.4 Example of controlling internal low-speed oscillation clock .............................................................171

5.6.5 CPU clock status transition diagram................................................................................................172

5.6.6 Condition before changing CPU clock and processing after changing CPU clock ..........................177

5.6.7 Time required for switchover of CPU clock and main system clock ................................................179

5.6.8 Conditions before clock oscillation is stopped .................................................................................180

CHAPTER 6 TIMER ARRAY UNIT...................................................................................................... 181

6.1 Functions of Timer Array Unit................................................................................................... 181

6.1.1 Functions of each channel when it operates independently ............................................................181

6.1.2 Functions of each channel when it operates with another channel .................................................182

6.1.3 LIN-bus supporting function (channel 7 only) ..................................................................................182

6.2 Configuration of Timer Array Unit ............................................................................................ 183

6.3 Registers Controlling Timer Array Unit.................................................................................... 188

6.4 Channel Output (TO0n pin) Control.......................................................................................... 209

6.4.1 TO0n pin output circuit configuration...............................................................................................209

6.4.2 TO0n Pin Output Setting .................................................................................................................210

6.4.3 Cautions on Channel Output Operation ..........................................................................................210

6.4.4 Collective manipulation of TO0n bits ...............................................................................................214

6.4.5 Timer Interrupt and TO0n Pin Output at Operation Start.................................................................215

6.5 Channel Input (TI0n Pin) Control .............................................................................................. 216

6.5.1 TI0n edge detection circuit ..............................................................................................................216

6.6 Basic Function of Timer Array Unit .......................................................................................... 217

6.6.1 Overview of single-operation function and combination-operation function.....................................217

6.6.2 Basic rules of combination-operation function.................................................................................217

6.6.3 Applicable range of basic rules of combination-operation function..................................................218

6.7 Operation of Timer Array Unit as Independent Channel ........................................................ 219

6.7.1 Operation as interval timer/square wave output ..............................................................................219

6.7.2 Operation as external event counter ...............................................................................................225

6.7.3 Operation as frequency divider (channel 0 only) .............................................................................228

6.7.4 Operation as input pulse interval measurement ..............................................................................232

6.7.5 Operation as input signal high-/low-level width measurement.........................................................236

6.8 Operation of Plural Channels of Timer Array Unit .................................................................. 240

6.8.1 Operation as PWM function ............................................................................................................240

6.8.2 Operation as one-shot pulse output function...................................................................................247

6.8.3 Operation as multiple PWM output function ....................................................................................254

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