Peripheral Pin Multiplexing (PPM) Module
MPC561/MPC563 Reference Manual, Rev. 1.2
Freescale Semiconductor
18-7
Figure 18-6. One Transmit and Receive Cycle in SPI Mode
18.3.1.3
PPM Control Settings
As data is transferred through the PPM module it must be sampled at a rate which guarantees its validity.
This sample rate is a multiple of PPM_TCLK and is defined by the SAMP[0:2] field of the PPMPCR
register. For transmit operations, the sample rate is the rate at which TX_DATA receives data from the
internal modules. For receive operations, it is the rate at which the internal modules read RX_SHIFTER.
The register RX_DATA is updated from RX_SHIFTER on completed receive (PPM_TSYNC) cycles.
SYSCLK
PPM_TCLK
PPM_TSYNC
PPM_RX
PPM_TX
CH0
CH1
CH2
CH3
CH[K]
CH0
CH1
CH2
CH3
CH0
CH[K]
One Cycle
CH0
“1”
“1”
Shading of PPM_RX signifies value is unknown
Summary of Contents for MPC561
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Page 144: ...Signal Descriptions MPC561 MPC563 Reference Manual Rev 1 2 2 46 Freescale Semiconductor...
Page 206: ...Central Processing Unit MPC561 MPC563 Reference Manual Rev 1 2 3 62 Freescale Semiconductor...
Page 302: ...Reset MPC561 MPC563 Reference Manual Rev 1 2 7 14 Freescale Semiconductor...
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Page 968: ...Development Support MPC561 MPC563 Reference Manual Rev 1 2 23 54 Freescale Semiconductor...
Page 1144: ...Internal Memory Map MPC561 MPC563 Reference Manual Rev 1 2 B 34 Freescale Semiconductor...
Page 1212: ...TPU3 ROM Functions MPC561 MPC563 Reference Manual Rev 1 2 D 60 Freescale Semiconductor...
Page 1216: ...Memory Access Timing MPC561 MPC563 Reference Manual Rev 1 2 E 4 Freescale Semiconductor...