CTU (Cross Triggering Unit)

TN0108

22/26

Doc ID 15874 Rev 2

8

CTU (Cross Triggering Unit)

8.1

CTU source update

The Cross Triggering Unit (CTU) provides a mechanism for an eMIOS or PIT timer event to

synchronize an ADC conversion. The CTU provides the ADC a channel number to define

which channel triggers the conversion.

On Cut 2 devices, channel 24 of eMIOS_0 and eMIOS_1 has been added as a trigger

source for the ADC. These channels, both type X, support OPWMT mode, which can be

used in conjunction with the ADC for lighting applications.

For full details of the CTU channels consult the device reference manual, where is a table

showing all of the CTU channel sources.

8.2

CTU PIT/eMIOS configuration change

On Cut 1 devices, the PIT_3 is mapped to CTU channel 28 and eMIOS_0 channel 23 is

mapped to CTU channel 23.

On Cut 2 devices, PIT_3 has been moved to CTU channel 23.

For the full CTU trigger source mapping, consult the device reference manual.

Table 22.

Additional CTU sources

Silicon revision

Additional CTU channels

CTU source number

SPC560B Cut 2

eMIOS_0 Channel 24 (Type X)

24

eMIOS_1 Channel 24 (Type X)

48

Table 23.

CTU PIT trigger source

Silicon revision

CTU channel 23

CTU channel 28

SPC560B Cut 1.1

eMIOS_0 Channel 23

PIT_3

SPC560B Cut 2

PIT_3

Reserved