MC9S12T64 Datasheet, PDF (282/608 Pages) Motorola, Inc – Specification

Freescale Semiconductor, Inc.
Clocks and Reset Generator (CRG)
Read: anytime.
Write: refer to each bit for write conditions.
RTIF — Real Time Interrupt Flag
RTIF is set to 1 at the end of every RTI period. This flag can only be
cleared by writing a 1. Writing a 0 has no effect. If enabled (RTIE=1),
RTIF causes an interrupt request.
1 = RTI time-out has occurred.
0 = RTI time-out has not yet occurred.
PORLVDRF — Power on Reset / Low-Voltage-Detector Reset Flag
PORLVDRF is set to 1 when a power on reset or low-voltage reset
occurs. This flag can only be cleared by writing a 1. Writing a 0 has
no effect.
1 = Power on reset or a low voltage reset has occurred
0 = Neither power on reset nor low voltage reset has occurred
LOCKIF — PLL Lock Interrupt Flag
LOCKIF is set to 1 when LOCK status bit changes. This flag can only
be cleared by writing a 1. Writing a 0 has no effect.If enabled
(LOCKIE=1), LOCKIF causes an interrupt request.
1 = LOCK bit has changed.
0 = No change in LOCK bit
LOCK — Lock Status Bit
LOCK reflects the current state of PLL lock condition. This bit is
cleared in Self Clock Mode. Writes have no effect.
1 = PLL VCO is within the desired tolerance of the target frequency.
0 = PLL VCO is not within the desired tolerance of the target
frequency.
TRACK — Track Status Bit
TRACK reflects the current state of PLL track condition. This bit is
cleared in Self Clock Mode. Writes have no effect. See Acquisition
and Tracking Modes in page 296 for more information.
1 = Tracking mode status.
0 = Acquisition mode status.
MC9S12T64Revision 1.1.1
Clocks and Reset Generator (CRG)
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