XC161 Datasheet, PDF (98/419 Pages) Infineon Technologies AG – 16-Bit Single-Chip Microcontroller with C166SV2 Core Volume 2 (of 2): Peripheral Units

XC161 Derivatives
Peripheral Units (Vol. 2 of 2)
The Analog/Digital Converter
Arbitration of Conversions
Conversion requests that are activated while the ADC is idle immediately trigger the
respective conversion. If a conversion is requested while another conversion is currently
in progress the operation of the A/D converter depends on the kind of the involved
conversions (standard or injected).
Note: A conversion request is activated if the respective control bit (ADST or ADCRQ)
is toggled from 0 to 1, i.e. the bit must have been zero before being set.
Table 16-2 summarizes the ADC operation in the possible situations.
Table 16-2 Conversion Arbitration
Conversion
in Progress _Standard
New Requested Conversion
Injected
Standard
Abort running conversion,
and start requested new
conversion.¹⁾
Complete running conversion,
start requested conversion after that.
Injected
Complete running conversion,
start requested conversion after
that.
Complete running conversion,
start requested conversion after that.
Bit ADCRQ will be 0 for the second
conversion, however.
1) If an injected conversion is pending when a standard conversion is re-started, the injected conversion is
executed before the newly started standard conversion.
User’s Manual
ADC_X1, V2.1
16-16
V2.2, 2004-01