MC912DG128ACPVE Datasheet, PDF (187/478 Pages) Freescale Semiconductor, Inc – Upward compatible with M68HC11 instruction set

Freescale Semiconductor, Inc.
Clock Functions
Clock Function Registers
12.12 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.
RTBYP — Real Time Interrupt Divider Chain Bypass
Write not allowed in normal modes, anytime in special modes. Read
anytime.
0 = Divider chain functions normally.
1 = Divider chain is bypassed, allows faster testing (the divider
chain is normally XCLK divided by 2¹³, when bypassed
becomes XCLK divided by 4).
MC68HC912DT128A — Rev 4.0
MOTOROLA
Clock Functions
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Technical Data
187