Peripheral Pin Multiplexing (PPM) Module
MPC561/MPC563 Reference Manual, Rev. 1.2
Freescale Semiconductor
18-13
10
CM
Continuous Mode.
0 Non-continuous mode (default). Transmit and/or receive one data frame when STR = 1.
(STR will be automatically cleared by the PPM after the transfer of one data frame.)
1 Data will continuously be transmitted and/or received as long as Transmit and Receive
are enabled.
Refer to
for more information.
Note:
Ensure PPMPCR[STR]=0 when setting PPMPCR[CM]=1
11:15
—
Reserved
1
Enable RX.
(a) If ENRX is disabled, no data will shift into the PPM.
(b) If ENRX is asserted while ENTX=1, the first data bit received will be the data that is transmitted from the PPM, and
. To receive the first data frame correctly, ENRX and ENTX should be set simultaneously.
2
Enable TX.
(a) If ENTX is disabled, no data will shift out of the PPM and the PPM output signals, PPM_TX0 and PPM_TX1 will be
high.
(b) If ENTX is asserted while ENRX = 1, the first data bits transmitted out of the PPM will be the data that was received
into the PPM. See
. To transmit the first data frame correctly, set ENTX and ENRX simultaneously.
Table 18-4. SAMP[0:2] Bit Settings
SAMP[0:2]
Sample Rate
000
Every TCLK
001
Every 2 TCLK
010
Every 4 TCLK
011
Every 8 TCLK
100 – 111
Every 16 TCLK
Table 18-3. PPMPCR Bit Descriptions (continued)
Bits
Name
Description
Summary of Contents for MPC561
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