mcf51jf128 Freescale Semiconductor, Inc, mcf51jf128 Datasheet - Page 445

• Manufacturer Part Number: mcf51jf128
• Description: Mcf51jf128 Reference Manual
• Manufacturer: Freescale Semiconductor, Inc

20.3.9 MCG Auto Trim Compare Value High Register (MCG_ATCVH)
Address: MCG_ATCVH is FFFF_8400h base + Ah offset = FFFF_840Ah
20.3.10 MCG Auto Trim Compare Value Low Register (MCG_ATCVL)
Address: MCG_ATCVL is FFFF_8400h base + Bh offset = FFFF_840Bh
Freescale Semiconductor, Inc.
Reserved
ATCVH
ATMS
ATMF
Field
Reset
Field
Reset
4–0
Read
7–0
Read
Write
Write
6
5
Bit
Bit
Automatic Trim Machine Select
Selects the IRCS clock for Auto Trim Test.
0
1
Automatic Trim machine Fail Flag
Fail flag for the Automatic Trim Machine (ATM). This bit asserts when the Automatic Trim Machine is
enabled (ATME=1) and a write to the C1, C3, C4, and ATC registers is detected or the MCG enters into
any Stop mode. A write to ATMF clears the flag.
0
1
This read-only bitfield is reserved and always has the value zero.
ATM Compare Value High
Values are used by Auto Trim Machine to compare and adjust Internal Reference trim values during ATM
SAR conversion.
7
0
7
0
32 kHz Internal Reference Clock selected.
4 MHz Internal Reference Clock selected.
Automatic Trim Machine completed normally.
Automatic Trim Machine failed.
MCG_ATC field descriptions (continued)
0
0
6
6
MCF51JF128 Reference Manual, Rev. 2, 03/2011
MCG_ATCVH field descriptions
0
0
5
5
Preliminary
0
0
4
4
ATCVH
ATCVL
Description
Description
Chapter 20 Multipurpose Clock Generator (MCG)
0
0
3
3
0
0
2
2
0
0
1
1
0
0
0
0
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