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MC68HC705MC4 Datasheet(PDF) 5 Page - Motorola, Inc |
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MC68HC705MC4 Datasheet(HTML) 5 Page - Motorola, Inc |
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5 / 99 page  MC68HC705MC4 Specification Rev. 1.5 MOTOROLA Page vi SECTION 10 SERIAL COMMUNICATIONS INTERFACE.................. 67 10.1 INTRODUCTION...................................................................... 67 10.2 FEATURES .............................................................................. 67 10.3 SCI DATA FORMAT ................................................................ 68 10.4 SCI OPERATION ..................................................................... 68 10.4.1 TRANSMITTER .................................................................. 68 10.4.1.1 Character Length........................................................... 68 10.4.1.2 Character Transmission ................................................ 68 10.4.1.3 Break Characters .......................................................... 70 10.4.1.4 Idle Characters .............................................................. 70 10.4.1.5 Transmitter Interrupts .................................................... 70 10.4.2 RECEIVER ......................................................................... 70 10.4.2.1 Character Length........................................................... 71 10.4.2.2 Character Reception ..................................................... 71 10.4.2.3 Receiver Wakeup .......................................................... 72 10.4.2.4 Receiver Noise Immunity .............................................. 72 10.4.2.5 Framing Errors .............................................................. 72 10.4.2.6 Receiver Interrupts ........................................................ 72 10.5 SCI I/O REGISTERS................................................................ 73 10.5.1 SCI Data Register (SCDR) ................................................. 73 10.5.2 SCI Control Register 1 (SCCR1) ........................................ 73 10.5.3 SCI Control Register 2 (SCCR2) ........................................ 74 10.5.4 SCI Status Register (SCSR)............................................... 76 10.5.5 Baud Rate Register (BAUD) ............................................... 78 SECTION 11 CORE TIMER................................................................. 81 11.1 CTIMER CONTROL AND STATUS REGISTER (CTCSR) $08 ........................................................................................... 82 11.1.1 CTOF - Core Timer Overflow Flag...................................... 82 11.1.2 RTIF - Real Time Interrupt Flag.......................................... 82 11.1.3 CTOIE - Core Timer Overflow Interrupt Enable.................. 82 11.1.4 RTIE - Real Time Interrupt Enable ..................................... 82 11.1.5 RT1:RT0 - Real Time Interrupt Rate Select........................ 83 11.2 COMPUTER OPERATING PROPERLY (COP) WATCHDOG RESET ..................................................................................... 83 11.3 CTIMER COUNTER REGISTER (CTCR) $09......................... 83 11.4 CORE TIMER DURING WAIT MODE...................................... 84 11.5 CORE TIMER DURING STOP MODE..................................... 84 SECTION 12 ELECTRICAL SPECIFICATIONS ................................. 85 12.1 MAXIMUM RATINGS............................................................... 85 12.2 THERMAL CHARACTERISTICS ............................................. 85 12.3 DC ELECTRICAL CHARACTERISTICS.................................. 86 12.4 A/D CONVERTER CHARACTERISTICS................................. 87 12.5 CONTROL TIMING .................................................................. 88 |
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