MPC5553/MPC5554 Microcontroller Reference Manual, Rev. 5
Freescale Semiconductor 11-15
14 LOLRE Loss-of-lock reset enable. The LOLRE bit determines how the integration module (the SIU)
handles a loss of lock indication. When operating in crystal reference, external reference,
or dual-controller mode, the FMPLL must be locked before setting the LOLRE bit.
Otherwise reset is immediately asserted. The LOLRE bit has no effect in bypass mode.
0 Ignore loss of lock - reset not asserted.
1 Assert reset on loss of lock. Reset will remain asserted, regardless of the source of
reset, until after the FMPLL has locked.
15 LOCRE Loss-of-clock reset enable. The LOCRE bit determines how the integration module (the
SIU) handles a loss of clock condition when LOCEN=1. LOCRE has no effect when
LOCEN=0. If the LOCF bit in the SYNSR indicates a loss of clock condition, setting the
LOCRE bit causes an immediate reset. In bypass mode LOCRE has no effect.
0 Ignore loss of clock - reset not asserted.
1 Assert reset on loss of clock.
16 DISCLK Disable CLKOUT. The DISCLK bit determines whether CLKOUT is active. When CLKOUT
is disabled it is driven low.
0 CLKOUT driven normally
1 CLKOUT driven low
17 LOLIRQ Loss-of-lock interrupt request. The LOLIRQ bit enables an interrupt request for LOLF when
it (LOLIRQ) is asserted and when LOLF is asserted. If either LOLF or LOLIRQ is negated,
the interrupt request is negated. When operating in crystal reference, external reference,
or dual-controller mode, the FMPLL must be locked before setting the LOLIRQ bit.
Otherwise an interrupt is immediately requested. The LOLIRQ bit has no effect in bypass
mode
0 Ignore loss of lock - interrupt not requested
1 Request interrupt
18 LOCIRQ Loss-of-clock interrupt request. The LOCIRQ bit determines how the integration module
(the SIU) handles a loss of clock condition when LOCEN=1. LOCIRQ has no effect when
LOCEN=0. If the LOCF bit in the SYNSR indicates a loss of clock condition, setting (or
having previously set) the LOCIRQ bit causes an interrupt request. In bypass mode
LOCIRQ has no effect.
0 Ignore loss of clock - interrupt not requested
1 Request interrupt on loss of clock.
Table 11-5. FMPLL_SYNCR Field Descriptions (Continued)
Bits Name Description
To Next Page
Loading...