MC68HC11A1 MOTOROLA [Motorola, Inc], MC68HC11A1 Datasheet - Page 39

• Manufacturer Part Number: MC68HC11A1
• Description: 8-Bit Microcontrollers
• Manufacturer: MOTOROLA [Motorola, Inc]

TMSK2 — Timer Interrupt Mask 2
TOI — Timer Overflow Interrupt Enable
RTII — Real-Time Interrupt Enable
PAOVI — Pulse Accumulator Overflow Interrupt Enable
PAII — Pulse Accumulator Input Edge Interrupt Enable
PR1, PR0 — Timer Prescaler Select
TFLG2 — Timer Interrupt Flag 2
TOF — Timer Overflow Flag
RTIF — Real-Time Interrupt Flag
PAOVF — Pulse Accumulator Overflow Flag
PAIF — Pulse Accumulator Input Edge Flag
PACTL — Pulse Accumulator Control
DDRA7 — Data Direction for Port A Bit 7
MC68HC11A8
MC68HC11A8TS/D
RESET:
RESET:
RESET:
Refer to 8 Main Timer.
Refer to 8 Main Timer.
Refer to 8 Main Timer.
Clear flags by writing a one to the corresponding bit position(s).
Refer to 8 Main Timer.
Refer to 8 Main Timer.
Set when PACNT changes from $FF to $00.
Set each time a selected active edge is detected on the PAI input line.
Refer to 5 Parallel Input/Output.
0 = PAOVF interrupts disabled
1 = Interrupt requested when RTIF is set to one
0 = PAIF interrupts disabled
1 = Interrupt requested when PAIF is set to one
DDRA7
Bit 7
Bit 7
TOF
Bit 7
TOI
0
0
0
Bits in TMSK2 correspond bit for bit with flag bits in TFLG2. Ones in TMSK2 enable
the corresponding interrupt sources.
PAEN
RTIF
RTII
6
0
6
0
6
0
PAMOD
PAOVF
PAOVI
5
0
5
0
5
0
PEDGE
PAIF
PAII
4
0
4
0
4
0
NOTE
3
0
0
3
0
0
3
0
0
2
0
0
2
0
0
2
0
0
RTR1
PR1
1
0
1
0
0
1
0
$1024
$1025
$1026
RTR0
Bit 0
PR0
Bit 0
Bit 0
0
0
0
0
MOTOROLA
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