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CHAPTER 7 8-BIT TIMER/EVENT COUNTER 80Figure 7-4. Interval Timer Operation TimingtCount clockTM80 count value00H01HN00H01HN00H01HNClearClearCR80N N N NTCE80Count startINTTM80Interrupt acknowledgmentInterrupt acknowledgmentTO80Interval time Interval time Interval timeRemarkInterval time = (N + 1) × tN = 00H to FFH102User’s Manual U14801EJ3V1<strong>UD</strong>
CHAPTER 7 8-BIT TIMER/EVENT COUNTER 807.4.2 Operation as external event counterThe external event counter counts the number of external clock pulses input to the TI80/P27/TO80 pin by using 8-bit timer counter 80 (TM80).To operate 8-bit timer/event counter 80 as an external event counter, settings must be made in the followingsequence. Set P27 to input mode (PM27 = 1). Disable operation of 8-bit timer counter 80 (TM80) (TCE80 (bit 7 of 8-bit timer mode control register 80(TMC80)) = 0). Specify the rising or falling edge of TI80 (see Table 7-4). Disable output of TO80 (TOE80 (bit 0 of TMC80) =0) and PWM output (PWME80 (bit 6 of TMC80) = 0). Set a count value in CR80. Enable the operation of TM80 (TCE80 = 1).Each time the valid edge specified by bit 1 (TCL800) of TMC80 is input, the value of 8-bit timer counter 80 (TM80)is incremented.When the count value of TM80 matches the value set in CR80, TM80 is cleared to 0 and continues counting. Atthe same time, an interrupt request signal (INTTM80) is generated.Figure 7-5 shows the timing of the external event counter operation (with rising edge specified).Cautions 1. Before rewriting CR80, stop the timer operation. If CR80 is rewritten while the timeroperation is enabled, a match interrupt request signal may be generated immediately at thepoint of rewrite.2. If setting the count clock to TMC80 and enabling the operation of TM80 are performed at thesame time with an 8-bit memory manipulation instruction, the error one cycle after the timerhas been started may exceed one clock. To use 8-bit timer/event counter 80 as an externalevent counter, therefore, make the settings in the above sequence.Figure 7-5. External Event Counter Operation Timing (with Rising Edge Specified)TI80 pin inputTM80 count value00H 01H 02H 03H 04H 05H N – 1 N 00H 01H 02H 03HCR80NTCE80INTTM80RemarkN = 00H to FFHUser’s Manual U14801EJ3V1<strong>UD</strong> 103
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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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CHAPTER 3 CPU ARCHITECTURE3.1 Memor
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CHAPTER 3 CPU ARCHITECTUREFigure 3-
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CHAPTER 3 CPU ARCHITECTURE3.1.1 Int
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CHAPTER 3 CPU ARCHITECTURE(a) Inter
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CHAPTER 3 CPU ARCHITECTURE3.2.2 Gen
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Page 63 and 64: CHAPTER 4 PORT FUNCTIONSTable 4-1.
Page 65 and 66: CHAPTER 4 PORT FUNCTIONS4.2.2 Port
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Page 69 and 70: CHAPTER 4 PORT FUNCTIONSFigure 4-7.
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Page 73 and 74: CHAPTER 4 PORT FUNCTIONS(3) Pull-up
Page 75 and 76: CHAPTER 5 CLOCK GENERATOR5.1 Clock
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Page 79 and 80: CHAPTER 5 CLOCK GENERATORFigure 5-4
Page 81 and 82: CHAPTER 5 CLOCK GENERATOR5.6 Changi
Page 83 and 84: Figure 6-1. Block Diagram of 16-Bit
Page 85 and 86: CHAPTER 6 16-BIT TIMER 906.3 Contro
Page 87 and 88: CHAPTER 6 16-BIT TIMER 90(2) Buzzer
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Page 93 and 94: CHAPTER 6 16-BIT TIMER 906.4.4 16-b
Page 95 and 96: CHAPTER 6 16-BIT TIMER 906.5 Notes
Page 97 and 98: CHAPTER 7 8-BIT TIMER/EVENT COUNTER
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Page 109 and 110: CHAPTER 8 WATCHDOG TIMER8.1 Watchdo
Page 115 and 116: CHAPTER 9 SERIAL INTERFACE 209.1 Fu
Page 117 and 118: Figure 9-2. Block Diagram of Baud R
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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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