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CHAPTER 6 16-BIT TIMER 90(3) Port mode register 3 (PM3)PM3 is used to set each bit of port 3 to input or output.When pin P30/TO90 is used for timer output, reset the output latch of P30 and PM30 to 0; when pinP31/BZO90 is used for buzzer output, reset the output latch of P31 and PM31 to 0.PM3 is set with a 1-bit or 8-bit memory manipulation instruction.RESET input sets PM3 to FFH.Figure 6-4. Format of Port Mode Register 3Symbol 7 6 5 4 3 2 1 0 Address After reset R/WPM31 1 1 1 1 1 PM31 PM30FF23H FFH R/WPM3n P3n pin I/O mode (n = 0, 1)01Output mode (output buffer on)Input mode (output buffer off)88User’s Manual U14801EJ3V1UD
CHAPTER 6 16-BIT TIMER 906.4 Operation of 16-Bit Timer 906.4.1 Operation as timer interrupt16-bit timer 90 can generate interrupts repeatedly each time the free-running counter value reaches the value setto CR90. Since this counter is not cleared and holds the count even after an interrupt is generated, the interval timeis equal to one cycle of the count clock set in TCL901 and TCL900.To operate 16-bit timer 90 as a timer interrupt, the following settings are required.• Set the count value in CR90• Set 16-bit timer mode control register 90 (TMC90) as shown in Figure 6-5.Figure 6-5. Settings of 16-Bit Timer Mode Control Register 90 for Timer Interrupt OperationTOD90 TOF90 CPT901 CPT900 TOC90 TCL901 TCL900 TOE90TMC90− 0/1 0/1 0/1 0/1 0/1 0/1 0/1Setting of count clock (see Table 6-2)Caution If both the CPT901 and CPT900 flags are set to 0, the capture operation is disabled.When the count value of 16-bit timer counter 90 (TM90) matches the value set in CR90, counting of TM90continues and an interrupt request signal (INTTM90) is generated.Table 6-2 shows the interval time, and Figure 6-6 shows the timing of the timer interrupt operation.Caution Perform the following processing when rewriting CR90 during a count operation. Disable interrupts (TMMK90 (bit 1 of interrupt mask flag register 1 (MK1)) = 1). Disable inversion control of timer output data (TOC90 = 0).If CR90 is rewritten with interrupts enabled, an interrupt request may be issued immediately atthe point of rewrite.Table 6-2. Interval Time of 16-Bit Timer 90TCL901TCL900Count ClockInterval TimeAt fX = 10.0 MHzOperation NoteAt fX = 5.0 MHzOperationAt fX = 10.0 MHzOperation NoteAt fX = 5.0 MHzOperation0 0 2 2 /fX 0.4 µs 0.8 µs 2 18 /fX 26.2 ms 52.4 ms0 1 2 6 /fX 6.4 µs 12.8 µs 2 22 /fX 419 ms 839 ms1 0 2 4 /fX 1.6 µs 3.2 µs 2 20 /fX 105 ms 210 ms1 1 Setting prohibitedNote Expanded-specification products only.RemarkfX: System clock oscillation frequencyUser’s Manual U14801EJ3V1UD 89
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User’s ManualµPD789074 Subseries
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NOTES FOR CMOS DEVICES1VOLTAGE APPL
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Regional InformationSome informatio
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INTRODUCTIONReadersPurposeOrganizat
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Documents for Flash Memory WritingP
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CHAPTER 11 STANDBY FUNCTION .......
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LIST OF FIGURES (1/3)Figure No. Tit
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LIST OF FIGURES (3/3)Figure No. Tit
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LIST OF TABLES (2/2)Table No. Title
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CHAPTER 1 GENERAL1.2 Features• RO
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CHAPTER 1 GENERAL1.6 Pin Configurat
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CHAPTER 1 GENERALThe major function
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CHAPTER 1 GENERAL1.8 Block DiagramT
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CHAPTER 1 GENERAL1.10 Differences B
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CHAPTER 2 PIN FUNCTIONS(2) Non-port
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CHAPTER 2 PIN FUNCTIONS(h) RxD20, T
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CHAPTER 2 PIN FUNCTIONS2.3 Pin I/O
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Page 63 and 64: CHAPTER 4 PORT FUNCTIONSTable 4-1.
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Page 75 and 76: CHAPTER 5 CLOCK GENERATOR5.1 Clock
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Page 79 and 80: CHAPTER 5 CLOCK GENERATORFigure 5-4
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Page 83 and 84: Figure 6-1. Block Diagram of 16-Bit
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CHAPTER 9 SERIAL INTERFACE 20(3) Ca
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CHAPTER 9 SERIAL INTERFACE 20(b) As
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CHAPTER 9 SERIAL INTERFACE 20(2) Co
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CHAPTER 9 SERIAL INTERFACE 20Figure
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CHAPTER 10 INTERRUPT FUNCTIONSTable
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CHAPTER 10 INTERRUPT FUNCTIONS10.3
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CHAPTER 10 INTERRUPT FUNCTIONS(2) I
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CHAPTER 10 INTERRUPT FUNCTIONS(4) P
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CHAPTER 10 INTERRUPT FUNCTIONSFigur
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CHAPTER 11 STANDBY FUNCTION11.1 Sta
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CHAPTER 11 STANDBY FUNCTION11.2 Ope
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CHAPTER 11 STANDBY FUNCTION11.2.2 S
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CHAPTER 12 RESET FUNCTIONThe follow
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CHAPTER 12 RESET FUNCTIONTable 12-1
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CHAPTER 13 µPD78F907613.1 Flash Me
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CHAPTER 13 µPD78F9076Figure 13-3.
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CHAPTER 13 µPD78F907613.1.3 On-boa
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CHAPTER 13 µPD78F9076When the rese
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CHAPTER 13 µPD78F9076Figure 13-9.
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CHAPTER 14 INSTRUCTION SET OVERVIEW
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CHAPTER 15 ELECTRICAL SPECIFICATION
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CHAPTER 18 RECOMMENDED SOLDERING CO
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APPENDIX A DEVELOPMENT TOOLSThe fol
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APPENDIX A DEVELOPMENT TOOLSA.1 Sof
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APPENDIX A DEVELOPMENT TOOLSA.4 Fla
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APPENDIX B NOTES ON TARGET SYSTEM D
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APPENDIX C REGISTER INDEXC.1 Regist
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APPENDIX C REGISTER INDEXC.2 Regist
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APPENDIX D REVISION HISTORYThe foll
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uPD789074 Subseries 8-Bit Single-Chip Microcontrollers UD - Home

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