MC68HC705J1ACPE Datasheet, PDF (112/162 Pages) Freescale Semiconductor, Inc – Freescale Semiconductor, Inc.

Freescale Semiconductor, Inc.
Multifunction Timer Module
9.4 Interrupts
These timer sources can generate interrupts:
• 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.
9.5 I/O Registers
These registers control and monitor the timer operation:
• Timer status and control register (TSCR)
• Timer counter register (TCR)
9.5.1 Timer Status and Control Register
The read/write timer status and control register (TSCR) performs these
functions:
• Flags timer interrupts
• Enables timer interrupts
• Resets timer interrupt flags
• Selects real-time interrupt rates
Address: $0008
Bit 7
6
5
4
3
2
1
Bit 0
Read: TOF
RTIF
0
0
TOIE RTIE
RT1
RT0
Write:
TOFR RTIFR
Reset: 0
0
0
0
0
0
1
1
= Unimplemented
Figure 9-3. Timer Status and Control Register (TSCR)
Technical Data
MC68HC705J1A — Rev. 4.0
Multifunction Timer Module
For More Information On This Product,
Go to: www.freescale.com