mcf51jf128 Freescale Semiconductor, Inc, mcf51jf128 Datasheet - Page 687

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

30.7.6 MUX Control Register (CMPx_MUXCR)
PEN and MEN bits should be enabled or disabled together with CR1[EN] bit.
Addresses: CMP0_MUXCR is FFFF_8530h base + 5h offset = FFFF_8535h
Freescale Semiconductor, Inc.
MSEL
PSEL
MEN
Reset
Field
PEN
Read
5–3
2–0
Write
7
6
Bit
PEN
PMUX Enable
This bit is used to enable positive MUX. When the PMUX is disabled, the PMUX output is in a high
impedance state. When software selects the same input for plus and minus inputs of the comparator, both
PMUX and MMUX are disabled automatically.
0
1
MMUX Enable
This bit is used to enable negative MUX. When the MMUX is disabled, the MMUX output is in a high
impedance state. When software selects the same input for plus and minus inputs of the comparator, both
PMUX and MMUX are disabled automatically.
0
1
Plus Input MUX Control
Determines which input is selected for the plus input of the comparator. For INx inputs, refer to CMP, DAC
and ANMUX Blocks Diagram.
NOTE: When an inappropriate operation selects the same input for both MUXes, the comparator
000
001
010
011
100
101
110
111
Minus Input MUX Control
Determines which input is selected for the minus input of the comparator. For INx inputs, refer to CMP,
DAC and ANMUX Blocks Diagram.
7
0
PMUX is disabled.
PMUX is enabled.
MMUX is disabled.
MMUX is enabled.
IN0
IN1
IN2
IN3
IN4
IN5
IN6
IN7
automatically shuts down to prevent itself from becoming a noise generator.
MEN
0
6
MCF51JF128 Reference Manual, Rev. 2, 03/2011
CMPx_MUXCR field descriptions
Table continues on the next page...
0
5
Preliminary
PSEL
0
4
Description
0
3
0
2
Chapter 30 Comparator (CMP)
MSEL
0
1
0
0
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