TC1796
Peripheral Units (Vol. 2 of 2)
Analog-to-Digital Converter (ADC)
User’s Manual 25-24 V2.0, 2007-07
ADC, V2.0
Figure 25-13 shows the cooperation of conversions requested by “Channel Injection”
and conversions triggered by “Timer” running in Arbitration Lock Mode. First, a
conversion is requested by “Channel Injection” with a source arbitration level of ‘L3’
using the Cancel-Inject-Repeat feature, during which the arbitration is locked by the
timer. This request is delayed until the timer triggered conversion is finished or until
“Channel Injection” is programmed to a higher priority than the timer. Second, a
conversion is requested by “Channel Injection” with a source arbitration level of ‘L1’ with
the Cancel-Inject-Repeat feature selected, during which the arbitration is locked by the
timer. In this case, the arbitration lock is not taken into account because the timer was
programmed on source arbitration level ‘L2’. Even a currently running timer triggered
conversion would have been cancelled and participates in arbitration anew.
Figure 25-13 Channel Injection and Timer Triggered Conversion
UnlockLock
Timer
MCT06016
On Timer
Underflow
Set by
Timer
Ignore
Arbitration Lock
Timer L2
Conversion Timer Level L2 CHIN Level L3 CHIN Level L1
Arbitration
Lock
Unlock Lock
Timer L2 Timer L2
CHIN L3 CHIN L3 CHIN L3 CHIN L1 CHIN L1 CHIN L1
Pending
Conversion
Requests
Arbitration
Cycle
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