MC68HC705MC4 Datasheet, PDF (5/99 Pages) Motorola, Inc – Microcontrollers

MC68HC705MC4 Specification Rev. 1.5
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
11.1.1
11.1.2
11.1.3
11.1.4
11.1.5
11.2
11.3
11.4
11.5
CTIMER CONTROL AND STATUS REGISTER (CTCSR)
$08 ........................................................................................... 82
CTOF - Core Timer Overflow Flag...................................... 82
RTIF - Real Time Interrupt Flag.......................................... 82
CTOIE - Core Timer Overflow Interrupt Enable.................. 82
RTIE - Real Time Interrupt Enable ..................................... 82
RT1:RT0 - Real Time Interrupt Rate Select........................ 83
COMPUTER OPERATING PROPERLY (COP) WATCHDOG
RESET ..................................................................................... 83
CTIMER COUNTER REGISTER (CTCR) $09......................... 83
CORE TIMER DURING WAIT MODE...................................... 84
CORE TIMER DURING STOP MODE..................................... 84
SECTION 12
12.1
12.2
12.3
12.4
12.5
ELECTRICAL SPECIFICATIONS ................................. 85
MAXIMUM RATINGS............................................................... 85
THERMAL CHARACTERISTICS ............................................. 85
DC ELECTRICAL CHARACTERISTICS.................................. 86
A/D CONVERTER CHARACTERISTICS................................. 87
CONTROL TIMING .................................................................. 88
MOTOROLA
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