TC1796
Peripheral Units (Vol. 2 of 2)
Analog-to-Digital Converter (ADC)
User’s Manual 25-45 V2.0, 2007-07
ADC, V2.0
25.1.9.1 Channel Request Source Control
Figure 25-23 shows the request control logic of each conversion channel n. Bit field
CHCONn.LCC determines which of the different request conditions is selected as
channel request. These conditions are:
• Conversion result value is inside/outside a specified range (limit checking enabled)
• CHSTATn.RESULT is updated (limit checking disabled)
• No action (no channel request generated)
When a selected request condition becomes active, the channel n request status flag
MSS0.MSRCHn is set and the channel n service request event is reported to the service
request compressor logic (if enabled by CHCONn.ENCH). The service request flag
MSS0.MSRCHn can only be cleared by software. For test purposes
(CON.SRTEST = 1), the service request flag can be additionally set by hardware.
Additional details on MSS0.MSRCHn software control are described on Page 25-48.
Figure 25-23 Channel n Request Source Logic
MCA06026_mod
LCC
CHCONn
3
MSRCHn
MSS0
Set
Result is not in area II
Result is not in area I
Result is not in area III
Result is in area II
Result is in area I
Result is in area III 111
STAT.RESULT is updated
No action
SRTEST
CON
Clear
&
Writing 1 to MSS0.MSRCHn
Clear
&
ENCH
CHCONn
Channel n
Service
Request
Event
≥1
001
010
011
101
110
100
000
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