Enhanced Time Processing Unit (eTPU)
MPC5565 Microcontroller Reference Manual, Rev. 1.0
17-40
Freescale Semiconductor
Table 17-25. ETPU_C
n
CR Field Descriptions
Field
Description
0
CIE
Channel interrupt enable. This bit is mirrored from the ETPU_CIER
0 Disable interrupt for this channel.For more information, refer to the
eTPU Reference Manual
.
1 Enable interrupt for this channel.
1
DTRE
Channel data transfer request enable. This bit is mirrored from the ETPU_CDTRER.
0 Disable data transfer request for this channel.Refer to the
eTPU Reference Manual
for more information.
1 Enable data transfer request for this channel.
2–3
CPR
[0:1]
Channel priority. Defines the priority level for the channel. The priority level is used by the hardware scheduler. The
values for CPR[1:0] and corresponding levels are shown in the table below.
For more information on the hardware scheduler, refer to the
eTPU Reference Manual
.
4–5
Reserved.
6
ETPD
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 the
eTPU Reference Manual
. The ETPD bit is only present in the MPC5565
and MPC5567.
0 Use PSTI for entry point selection.
1 Use PSTO for entry point selection.
7
ETCS
Entry table condition select. Determines the channel condition encoding scheme that selects the entry point to be
taken in an entry table. The ETCS value has to be compatible with the function chosen for the channel, selected in
ETPU_C
n
CR[CFS]. Two condition encoding schemes are available.
1 Select alternate entry table condition encoding scheme.
0 Select standard entry table condition encoding scheme.For details about entry table and condition encoding
schemes, refer to the
eTPU Reference Manual
.
8–10
Reserved.
11–15
CFS
[0:4]
Channel function select. Defines the function to be performed by the channel. The function assigned to the channel
has to be compatible with the channel condition encoding scheme, selected by ETPU_C
n
CR[ETCS]. For more
information about functions, refer to the
eTPU Reference Manual
.
16
ODIS
Output disable. 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.
0 Turns off the output disable feature for the channel.For more information on output disable, refer to the
eTPU
Reference Manual
.
1 Turns on 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 ETPU_C
n
CR[ODIS], the channel output signal to the opposite of this polarity.
0 Output active low (output disable drives output to high)
1 Output active high (output disable drives output to low)
CPR
Priority
00
Disabled
01
Low
10
Middle
11
High
Содержание MPC5565
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