Datasheet

Chapter 5 Resets, Interrupts, and General System Control
MC9RS08KA2 Series Data Sheet, Rev. 4
42 Freescale Semiconductor
NOTE
To power down the internal 1-kHz oscillator completely in MCU STOP
mode, RTIS bits must be selected to %000 and RTICLKS bit must be set
to 1.
4
RTIE
Real-Time Interrupt Enable — This read-write bit enables real-time interrupts.
0 Real-time interrupts disabled.
1 Real-time interrupts enabled.
2:0
RTIS
Real-Time Interrupt Delay Selects — These read/write bits select the period for the RTI. See Table 5 - 7.
Table 5-7. Real-Time Interrupt Period
RTIS RTI Timeout
1
1
Timeout values shown based on RTI clock source of 1 ms period. Consult
electricals for tolerances of internal 1-kHz source, t
RTI
(Tabl e A- 8) and the
internal 32-kHz from ICS (Ta bl e A -7).
000 Disable RTI
001 8 ms
010 32 ms
011 64 ms
100 128 ms
101 256 ms
110 512 ms
111 1.024 s
Table 5-6. SRTISC Register Field Descriptions (continued)
Field Description