TC1796
Peripheral Units (Vol. 2 of 2)
Analog-to-Digital Converter (ADC)
User’s Manual 25-16 V2.0, 2007-07
ADC, V2.0
highest to the lowest channel number. Starting a conversion causes the conversion
request pending flag in register ASCRP to be cleared.
The auto-scan sequence is complete if the channel with the lowest number selected to
be auto-scanned has been converted (all bits in register ASCRP are cleared).
In single conversion sequence mode, the bit field CON.SCNM is automatically
cleared and the conversion request source “Auto-scan” is disabled.
In continuous conversion sequence mode, the conversion request source “Auto-
scan” automatically requests a new auto-scan sequence. Results previously stored in
the specific channel status register(s) will be overwritten. Continuous auto-scan
sequence is performed until auto-scan is stopped under software control.
If a currently running “Auto-scan” initiated conversion is cancelled, the arbiter sets the
corresponding conversion request bit in register ASCRP for this channel.
After the conversion of the last channel within an auto-scan sequence has been finished,
the source service request flag MSS1.MSRAS is set. Auto-scan service requests can be
generated only if the auto-scan service request is enabled by SRNP.ENPAS = 1.
The ASGT input connection depends on the product specific implementation of the ADC
module. It is described on Page 25-114.
The auto-scan control functionality is described in Table 25-3, Table 25-4 and
Table 25-5. This description of the auto-scan includes the actions to be performed on
changes in the auto-scan mode or the channels to be auto-scanned as well as clearing
the auto-scan arbitration participation flag.
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