NXP Semiconductors MPC5605BK, Reference Manual

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Chapter 29 Cross Triggering Unit (CTU)
MPC5606BK Microcontroller Reference Manual, Rev. 2
Freescale Semiconductor 781
The CLR_FLAG bit has to be used cautiously as setting this bit may result in a loss of events.
The event input can be masked by writing 0 to bit TM of the CTU_EVTCFGR register. Writing 1 to bit
TM enables the CTU triggering and automatically disables the DMA connection for the corresponding
eMIOS channel.
NOTE
The CTU tracks issued conversion requests to the ADC. When the ADC is
being triggered by the CTU and there is a need to shut down the ADC, the
ADC must be allowed to complete conversions before being shut down.
This ensures that the CTU is notified of completion; if the ADC is shut down
while performing a CTU-triggered conversion, the CTU is not notified and
will not be able to trigger further conversions until the device is reset.
29.5 Functional description
This peripheral is used to synchronize ADC conversions with timer events (from eMIOS or PIT). When a
timer event occurs, the CTU triggers an ADC conversion providing the ADC channel number to be
converted. In case concurrent events occur the priority is managed according to the index of the timer
event. The trigger output is a single cycle pulse used to trigger ADC conversion of the channel number
provided by the CTU.
Each trigger input from the CTU is connected to the Event Trigger signal of an eMIOS channel. The
assignment between eMIOS outputs and CTU trigger inputs is defined in
Table 29-3 .
Table 29-3. Trigger source
CTU trigger No. Module Source
0 eMIOS 0 Channel_0
1 eMIOS 0 Channel_1
2 eMIOS 0 Channel_2
3 eMIOS 0 Channel_3
4 eMIOS 0 Channel_4
5 eMIOS 0 Channel_5
6 eMIOS 0 Channel_6
7 eMIOS 0 Channel_7
8 eMIOS 0 Channel_8
9 eMIOS 0 Channel_9
10 eMIOS 0 Channel_10
11 eMIOS 0 Channel_11
12 eMIOS 0 Channel_12
13 eMIOS 0 Channel_13
14 eMIOS 0 Channel_14