uPD789074 Subseries 8-Bit Single-Chip Microcontrollers UD - Home

6.4.3 Capture operation........................................................................................................................926.4.4 16-bit timer counter 90 readout....................................................................................................936.4.5 Buzzer output operation ..............................................................................................................946.5 Notes on Using 16-Bit Timer 90................................................................................................956.5.1 Restrictions on rewriting16-bit compare register 90.....................................................................95CHAPTER 7 8-BIT TIMER/EVENT COUNTER 80...............................................................................977.1 Functions of 8-Bit Timer/Event Counter 80.............................................................................977.2 Configuration of 8-Bit Timer/Event Counter 80 ......................................................................987.3 8-Bit Timer/Event Counter 80 Control Registers ....................................................................997.4 Operation of 8-Bit Timer/Event Counter 80 ...........................................................................1017.4.1 Operation as interval timer ........................................................................................................ 1017.4.2 Operation as external event counter.......................................................................................... 1037.4.3 Operation as square-wave output.............................................................................................. 1047.4.4 Operation as PWM output ......................................................................................................... 1067.5 Notes on Using 8-Bit Timer/Event Counter 80 ......................................................................107CHAPTER 8 WATCHDOG TIMER .......................................................................................................1098.1 Watchdog Timer Functions.....................................................................................................1098.2 Watchdog Timer Configuration ..............................................................................................1108.3 Watchdog Timer Control Registers........................................................................................1118.4 Watchdog Timer Operation.....................................................................................................1138.4.1 Operation as watchdog timer..................................................................................................... 1138.4.2 Operation as interval timer ........................................................................................................ 114CHAPTER 9 SERIAL INTERFACE 20 ................................................................................................1159.1 Functions of Serial Interface 20..............................................................................................1159.2 Configuration of Serial Interface 20 .......................................................................................1159.3 Control Registers of Serial Interface 20 ................................................................................1199.4 Operation of Serial Interface 20..............................................................................................1269.4.1 Operation stop mode................................................................................................................. 1269.4.2 Asynchronous serial interface (UART) mode............................................................................. 1279.4.3 3-wire serial I/O mode ............................................................................................................... 140CHAPTER 10 INTERRUPT FUNCTIONS ............................................................................................15010.1 Interrupt Function Types.........................................................................................................15010.2 Interrupt Sources and Configuration.....................................................................................15010.3 Interrupt Function Control Registers.....................................................................................15310.4 Interrupt Processing Operation..............................................................................................15810.4.1 Non-maskable interrupt request acknowledgment operation..................................................... 15810.4.2 Maskable interrupt request acknowledgment operation.............................................................16010.4.3 Multiple interrupt servicing......................................................................................................... 16210.4.4 Interrupt request hold ................................................................................................................ 16412User’s Manual U14801EJ3V1UD