Enhanced Time Processing Unit (eTPU)
MPC5565 Microcontroller Reference Manual, Rev. 1.0
Freescale Semiconductor
17-13
17.3.2.1
Time Base Clock Signal (TCRCLK[A])
The TCRCLK[A] input signals are used to control the TCR1 and TCR2 time bases for eTPU A.
NOTE
Throughout this document, TCRCLKA is referred to generically as
TCRCLK.
There is one independent TCRCLK input for each engine.
connections. For pulse accumulator operations TCRCLK can be used as a gate for a counter based on the
system clock divided by eight. For angle operations TCRCLK can be used to get the tooth transition
indications in angle mode. Refer to the
eTPU Reference Manual’s
Sections 5.9 and 5.10.
17.3.2.2
Channel Output Disable Signals
Each eTPU engine has four input signals that are used to force the outputs of a group of 8 channels to an
inactive level. These signals originate from the eMIOS. When an output disable signal is active, all the
eight channels assigned to the disable signal that have their ODIS bits set to one in ETPU_C
n
CR register
have their outputs forced to the opposite of the value specified in the ETPU_C
n
CR[OPOL] bit. Therefore,
individual channels can be selected to be affected by the output disable signals, as well as their disabling
forced polarity.
Refer to
Section 16.2.1.1, “Output Disable Input—eMIOS Output Disable Input Signals
information on the output disable signals.
The output disable channel groups are defined in
1
The channel numbers for some of the DSPI channels connections are reversed, for example if eTPU A[16:19] is mapped to
DSPI B[7:4], then eTPU A[16] is connected to DSPI B[7], eTPU A[17] is connected to DSPI B[6],..., and eTPU A[19] is
connected to DSPI B[4]
Table 17-2. MPC5565 TCRCLK Signal
Signal Name
Pin Assignment
I/O
Pin Connection
496 BGA
324 BGA
TCRCLKA_
IRQ[7]_
GPIO[113]
Primary
Alternate
General-purpose I/O
I
I
I/O
M2
M2
Table 17-3. Output Disable Channel Groups
eMIOS Channel
Engine
eTPU Channels Disabled
11
A
0–7
10
8–15
9
16–23
8
24–31
Содержание MPC5565
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