NXP Semiconductors MPC5644A, Reference Manual, Page: 804 / 1735

Enhanced Time Processing Unit (eTPU2)
MPC5644A Microcontroller Reference Manual, Rev. 6
804 Freescale Semiconductor
4-5 Reserved
6 ETPD—Entry Table Pin Direction
This bit selects which channel signal, input or output, is used in the Entry Point selection. The ETPD value
has to be compatible with the function chosen for the channel, selected in the field CFS. For details about
Entry Table and condition encoding schemes, refer to
Section 24.5.1.1, Entry points .
1: use PSTO for Entry Point selection.
0: use PSTI for Entry Point selection.
7 ETCS—Entry Table Condition Select
This bit determines the channel condition encoding scheme that selects, according to channel conditions,
the Entry Point to be taken in an Entry Table. ETCS value has to be compatible with the function chosen
for the channel, selected in field CFS. Two condition encoding schemes are available. For details about
Entry Table and condition encoding schemes, refer to
Section 24.5.1.1, Entry points .
1: select Alternate Entry Table Condition encoding scheme.
0: select Standard Entry Table Condition encoding scheme.
Note: The fields ETCS, CFS and CPBA must only be changed while the channel is disabled (field
CPR = 00).
8-10 Reserved
11-15 CFS[4:0]—Channel Function Select
This field defines the function to be performed by the channel (see Section 24.5.1, Functions and threads ).
The Function assigned to the channel has to be compatible with the channel condition encoding scheme,
selected by field ETCS.
Note: The fields ETCS, CFS and CPBA must only be changed while the channel is disabled (field
CPR = 00).
16 ODIS—Output Disable
This bit enables the channel to have its output forced to the value opposite to OPOL when the output
disable input signal corresponding to the channel group that it belongs is active. See
Section 24.3.2.4,
ipp_ind_etpu_odis_[1|2]([0 – 3]) eTPU Channel Output Disable Signals and Figure 24-37 .
1: turns on the output disable feature for the channel
0: turns off the output disable feature for the channel.
17 OPOL—Output Polarity
Determines the output signal polarity. The activation of the output disable signal forces, when enabled by
the ODIS bit, the channel output signal to the opposite of this polarity (see
Figure 24-37 ).
1: output active high (output disable drives output to low)
0: output active low (output disable drives output to high)
18-20 Reserved
Table 24-33. ETPU_CxCR field description
Field Description