MCG_SC field descriptions (continued)
Field Description
3–1
FCRDIV
Fast Clock Internal Reference Divider
Selects the amount to divide down the fast internal reference clock. The resulting frequency will be in the
range 31.25 kHz to 4 MHz (Note: Changing the divider when the Fast IRC is enabled is not supported).
000 Divide Factor is 1
001 Divide Factor is 2.
010 Divide Factor is 4.
011 Divide Factor is 8.
100 Divide Factor is 16
101 Divide Factor is 32
110 Divide Factor is 64
111 Divide Factor is 128.
0
LOCS0
OSC0 Loss of Clock Status
The LOCS0 indicates when a loss of OSC0 reference clock has occurred. The LOCS0 bit only has an
effect when CME0 is set. This bit is cleared by writing a logic 1 to it when set.
0 Loss of OSC0 has not occurred.
1 Loss of OSC0 has occurred.
24.3.9 MCG Auto Trim Compare Value High Register (MCG_ATCVH)
Address: 4006_4000h base + Ah offset = 4006_400Ah
Bit 7 6 5 4 3 2 1 0
Read
ATCVH
Write
Reset
0 0 0 0 0 0 0 0
MCG_ATCVH field descriptions
Field Description
7–0
ATCVH
ATM Compare Value High
Values are used by Auto Trim Machine to compare and adjust Internal Reference trim values during ATM
SAR conversion.
24.3.10 MCG Auto Trim Compare Value Low Register (MCG_ATCVL)
Address: 4006_4000h base + Bh offset = 4006_400Bh
Bit 7 6 5 4 3 2 1 0
Read
ATCVL
Write
Reset
0 0 0 0 0 0 0 0
Chapter 24 Multipurpose Clock Generator (MCG)
KL25 Sub-Family Reference Manual, Rev. 3, September 2012
Freescale Semiconductor, Inc. 381
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