MC68HC912DG128 Datasheet, PDF (185/452 Pages) Motorola, Inc – Microcontrollers

Freescale Semiconductor, Inc.
Clock Functions
Clock Function Registers
Clock monitor time-outs are shown in Table 11-3. The corresponding
EXTALi clock period with an ideal 50% duty cycle is twice this time-out
value.
Table 11-3. Clock Monitor Time-Outs
Supply
5 V +/– 10%
Range
2–20 µS
11.12 Clock Function Registers
All register addresses shown reflect the reset state. Registers may be
mapped to any 2K byte space.
Bit 7
6
5
4
RTIE
RSWAI RSBCK Reserved
RESET:
0
0
0
0
RTICTL — Real-Time Interrupt Control Register
3
RTBYP
0
2
RTR2
0
1
RTR1
0
Bit 0
RTR0
0
$0014
RTIE — Real Time Interrupt Enable
Read and write anytime.
0 = Interrupt requests from RTI are disabled.
1 = Interrupt will be requested whenever RTIF is set.
RSWAI — RTI and COP Stop While in Wait
Write once in normal modes, anytime in special modes. Read
anytime.
0 = Allows the RTI and COP to continue running in wait.
1 = Disables both the RTI and COP whenever the part goes into
Wait.
RSBCK — RTI and COP Stop While in Background Debug Mode
Write once in normal modes, anytime in special modes. Read
anytime.
0 = Allows the RTI and COP to continue running while in
background mode.
1 = Disables both the RTI and COP when the part is in background
mode. This is useful for emulation.
MC68HC912DG128 — Rev 3.0
MOTOROLA
Clock Functions
For More Information On This Product,
Go to: www.freescale.com
Technical Data
185