MC68HC705J MOTOROLA [Motorola, Inc], MC68HC705J Datasheet - Page 112

• Manufacturer Part Number: MC68HC705J
• Description: Microcontrollers
• Manufacturer: MOTOROLA [Motorola, Inc]

Multifunction Timer Module
9.4 Interrupts
9.5 I/O Registers
9.5.1 Timer Status and Control Register
Technical Data
112
Address:
These timer sources can generate interrupts:
These registers control and monitor the timer operation:
The read/write timer status and control register (TSCR) performs these
functions:
Reset:
Read:
Write:
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Timer overflow flag (TOF) — The TOF bit is set when the first eight
stages of the counter roll over from $FF to $00. The timer overflow
interrupt enable bit, TOIE, enables TOF interrupt requests.
Real-time interrupt flag (RTIF) — The RTIF bit is set when the
selected RTI output becomes active. The real-time interrupt
enable bit, RTIE, enables RTIF interrupt requests.
Timer status and control register (TSCR)
Timer counter register (TCR)
Flags timer interrupts
Enables timer interrupts
Resets timer interrupt flags
Selects real-time interrupt rates
Figure 9-3. Timer Status and Control Register (TSCR)
$0008
Bit 7
TOF
0
Multifunction Timer Module
= Unimplemented
RTIF
6
0
TOIE
5
0
RTIE
4
0
TOFR
3
0
0
MC68HC705J1A — Rev. 4.0
RTIFR
2
0
0
RT1
1
1
MOTOROLA
Bit 0
RT0
1