Clocks and Power Control
MPC561/MPC563 Reference Manual, Rev. 1.2
8-36
Freescale Semiconductor
8.11.3
Change of Lock Interrupt Register (COLIR)
The COLIR is 16-bit read/write register. It controls the change of lock interrupt generation, and is used for
reporting a loss of lock interrupt source. It contains the interrupt request level and the interrupt status bit.
This register is readable and writable at any time. A status bit is cleared by writing a one (writing a zero
does not affect a status bit’s value). The COLIR is mapped into the MPC561/MPC563 USIU register map.
25
LOLRE
Loss of lock reset enable
0 Loss of lock does not cause HRESET assertion
1 Loss of lock causes HRESET assertion
Note: if limp mode is enabled, use the COLIR feature instead of setting the LOLRE bit. See
Section 8.11.3, “Change of Lock Interrupt Register (COLIR)
.”
26
—
Reserved
27:31
DIVF
The DIVF bits control the value of the pre-divider in the SPLL circuit. The DIVF bits can be
read and written at any time. However, the DIVF field can be write-protected by setting the
MF and pre-divider lock (MFPDL) bit in the SCCR. Changing the DIVF bits causes the SPLL
to lose lock.
MSB
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
LSB
15
Field
COLIRQ
COLIS
—
COLIE
—
SRESET
0000_0000_00
Unaffected
Addr
0x2F C28C
Figure 8-18. Change of Lock Interrupt Register (COLIR)
Table 8-12. COLIR Bit Descriptions
Bits
Name
Description
0:7
COLIRQ
Change of lock interrupt request level. These bits determine the interrupt priority level of the
change of lock. To specify a certain level, the appropriate one of these bits should be set.
8
COLIS
If set (1), the bit indicates that a change in the PLL lock status was detected. The PLL was
locked and lost lock, or the PLL was unlocked and got locked. The bit should be cleared by
writing a one.
9
—
Reserved
10
COLIE
Change of Lock Interrupt enable. If COLIE bit is asserted, an interrupt will be generated
when the COLIS bit is asserted.
0 Change of lock Interrupt disable
1 Change of lock Interrupt enable
11:15
—
Reserved
Table 8-11. PLPRCR Bit Descriptions (continued)
Bits
Name
Description
Summary of Contents for MPC561
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