MPC5553/MPC5554 Microcontroller Reference Manual, Rev. 5
Freescale Semiconductor
11-17
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
R
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
W
Reset
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Reg Addr
Base + 0x0004
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
R
0
0
0
0
0
0
LOLF
LOC
MODE
PLL
SEL
PLL
REF
LOCKS LOCK LOCF CALD
ONE
CAL
PASS
W
w1c
w1c
Reset
0
0
0
0
0
0
0
0
—
—
0
0
0
Reg Addr
Base + 0x0004
1
Reset state determined during reset configuration. (See
Section 11.1.4, “FMPLL Modes of Operation
,” for more
information.)
2
Reset state determined during reset.
3
“w1c” signifies that this bit is cleared by writing a 1 to it.
Figure 11-9. Synthesizer Status Register (FMPLL_SYNSR)
Table 11-6. FMPLL_SYNSR Field Descriptions
Bits
Name
Description
0–21
—
Reserved.
22
LOLF
Loss-of-lock flag. Provides the interrupt request flag. This is a write 1 to clear (w1c) bit; to
clear the flag, the user must write a 1 to the bit. Writing 0 has no effect. This flag will not be
set, and an interrupt will not be requested, if the loss of lock condition was caused by a
system reset, a write to the FMPLL_SYNCR which modifies the MFD bits, or enabling
frequency modulation. If the flag is set due to a system failure, writing the MFD bits or
enabling FM will not clear the flag. Asserting reset will clear the flag. This flag bit is sticky
in the sense that if lock is reacquired, the bit will remain set until either a write 1 or reset is
asserted.
0 Interrupt service not requested
1 Interrupt service requested
Note: Upon a loss-of-lock that is not generated by:
•
a system reset
•
a write to the FMPLL_SYNCR that modifies the MFD or PREDIV bits
•
enabling of frequency modulation
the LOLF is set only if LOLIRQ is set. If the FMPLL reacquires lock and any of the
previous conditions in the bulleted list occurs, the LOLF is set again. To avoid
generating an unintentional interrupt, clear LOLIRQ before changing MFD or
PREDIV, or before enabling FM after a previous interrupt and relock occurred.
Summary of Contents for MPC5553
Page 5: ...MPC5553 MPC5554 Microcontroller Reference Manual Rev 5 2 Freescale Semiconductor...
Page 21: ...MPC5553 MPC5554 Microcontroller Reference Manual Rev 5 xvi Freescale Semiconductor...
Page 47: ...MPC5553 MPC5554 Microcontroller Reference Manual Rev 5 1 26 Freescale Semiconductor...
Page 163: ...MPC5553 MPC5554 Microcontroller Reference Manual Rev 5 4 20 Freescale Semiconductor...
Page 179: ...MPC5553 MPC5554 Microcontroller Reference Manual Rev 5 5 16 Freescale Semiconductor...
Page 561: ...MPC5553 MPC5554 Microcontroller Reference Manual Rev 5 13 38 Freescale Semiconductor...
Page 615: ...MPC5553 MPC5554 Microcontroller Reference Manual Rev 5 14 54 Freescale Semiconductor...
Page 707: ...MPC5553 MPC5554 Microcontroller Reference Manual Rev 5 17 68 Freescale Semiconductor...
Page 755: ...MPC5553 MPC5554 Microcontroller Reference Manual Rev 5 18 48 Freescale Semiconductor...
Page 873: ...MPC5553 MPC5554 Microcontroller Reference Manual Rev 5 19 118 Freescale Semiconductor...
Page 984: ...MPC5553 MPC5554 Microcontroller Reference Manual Rev 5 Freescale Semiconductor 21 41...
Page 985: ...MPC5553 MPC5554 Microcontroller Reference Manual Rev 5 21 42 Freescale Semiconductor...
Page 1019: ...MPC5553 MPC5554 Microcontroller Reference Manual Rev 5 22 34 Freescale Semiconductor...
Page 1129: ...MPC5553 MPC5554 Microcontroller Reference Manual Rev 5 25 90 Freescale Semiconductor...