MC68HCP11 Datasheet, PDF (39/45 Pages) Motorola, Inc – 8-Bit Microcontroller

TMSK2 — Timer Interrupt Mask 2
Bit 7
6
5
4
3
TOI
RTII PAOVI PAII
0
RESET:
0
0
0
0
0
$1024
2
1
Bit 0
0
PR1
PR0
0
0
0
TOI — Timer Overflow Interrupt Enable
Refer to 8 Main Timer.
RTII — Real-Time Interrupt Enable
Refer to 8 Main Timer.
PAOVI — Pulse Accumulator Overflow Interrupt Enable
0 = PAOVF interrupts disabled
1 = Interrupt requested when RTIF is set to one
PAII — Pulse Accumulator Input Edge Interrupt Enable
0 = PAIF interrupts disabled
1 = Interrupt requested when PAIF is set to one
PR1, PR0 — Timer Prescaler Select
Refer to 8 Main Timer.
NOTE
Bits in TMSK2 correspond bit for bit with flag bits in TFLG2. Ones in TMSK2 enable
the corresponding interrupt sources.
TFLG2 — Timer Interrupt Flag 2
Bit 7
6
5
4
3
2
1
TOF
RTIF PAOVF PAIF
0
0
0
RESET:
0
0
0
0
0
0
0
Clear flags by writing a one to the corresponding bit position(s).
$1025
Bit 0
0
0
TOF — Timer Overflow Flag
Refer to 8 Main Timer.
RTIF — Real-Time Interrupt Flag
Refer to 8 Main Timer.
PAOVF — Pulse Accumulator Overflow Flag
Set when PACNT changes from $FF to $00.
PAIF — Pulse Accumulator Input Edge Flag
Set each time a selected active edge is detected on the PAI input line.
PACTL — Pulse Accumulator Control
Bit 7
6
5
4
3
DDRA7 PAEN PAMOD PEDGE
0
RESET:
0
0
0
0
0
$1026
2
1
Bit 0
0
RTR1 RTR0
0
0
0
DDRA7 — Data Direction for Port A Bit 7
Refer to 5 Parallel Input/Output.
MC68HC11A8
MC68HC11A8TS/D
MOTOROLA
39