mcf51jf128 Freescale Semiconductor, Inc, mcf51jf128 Datasheet - Page 644

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

Register Definition
29.3.6 Status and control register 2 (ADCx_SC2)
The SC2 register contains the conversion active, hardware/software trigger select,
compare function and voltage reference select of the ADC module.
Addresses: ADC0_SC2 is FFFF_8600h base + 20h offset = FFFF_8620h
644
Reset
Reset
Bit
Bit
W
W
Reserved
R
R
ADTRG
ADACT
ACFE
31–8
Field
7
6
5
31
15
0
0
30
14
0
0
This read-only bitfield is reserved and always has the value zero.
Conversion active
ADACT indicates that a conversion or hardware averaging is in progress. ADACT is set when a
conversion is initiated and cleared when a conversion is completed or aborted.
0
1
Conversion trigger select
ADTRG selects the type of trigger used for initiating a conversion. Two types of trigger are selectable:
software trigger and hardware trigger. When software trigger is selected, a conversion is initiated following
a write to SC1A. When hardware trigger is selected, a conversion is initiated following the assertion of the
ADHWT input after a pulse of the ADHWTSn input.
0
1
Compare function enable
ACFE enables the compare function.
Conversion not in progress.
Conversion in progress.
Software trigger selected.
Hardware trigger selected.
29
13
0
0
28
12
0
0
MCF51JF128 Reference Manual, Rev. 2, 03/2011
0
27
11
0
0
ADCx_SC2 field descriptions
Table continues on the next page...
26
10
0
0
25
0
0
9
Preliminary
24
0
0
8
0
Description
23
0
0
7
22
0
0
6
21
0
0
5
20
0
0
4
Freescale Semiconductor, Inc.
19
0
0
3
18
0
0
2
17
0
REFSEL
0
1
16
0
0
0