Peripheral Pin Multiplexing (PPM) Module
MPC561/MPC563 Reference Manual, Rev. 1.2
Freescale Semiconductor
18-5
Figure 18-3. Internal Multiplexer Mechanism for Transmit Data
Figure 18-4. Internal Multiplexer Mechanism for Received Data
18.3.1.2
PPM Clocks
The PPM module generates and outputs two clock signals, PPM_TCLK and PPM_TSYNC. The
PPM_TCLK and PPM_TSYNC clocks are the basis for all PPM communication functions; single data bits
are transmitted and received on PPM_TCLK cycles, one PPM_TSYNC clock cycle defines a single 16-bit
word transmit/receive cycle. The PPM can be configured to transfer data in one of two clock modes, SPI
and TDM.
shows examples of PPM_TCLK in SPI and TDM modes. The frequency of
PPM_TCLK is a function of the system clock (SYSCLK) and is programmable using the
A_TPUCH0
CH15
CH0
B_TPUCH0
MPWM0
TX_CONFIG[CH15]
TX_SHIFTER
TX_CONFIG[CH0]
PPM_TX[0:1]
GPDO15
A_TPUCH15
B_TPUCH15
MDA14
GPDO0
•
•
•
•••
•
•
•
A_TPUCH0
CH15
CH0
B_TPUCH0
MPWM0
A_TPUCH15
B_TPUCH15
MDA14
RX_CONFIG[CH15]
RX_SHIFTER
RX_CONFIG[CH0]
PPM_RX[0:1]
CH15
CH0
CH15
CH0
•
RX_DATA
•
•
•
GPDI
RX_CONFIG[CHx]
•
•
•
•
•
•
•
•
•
••
•
Summary of Contents for MPC561
Page 84: ...MPC561 MPC563 Reference Manual Rev 1 2 lxxxiv Freescale Semiconductor...
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...
Page 854: ...Time Processor Unit 3 MPC561 MPC563 Reference Manual Rev 1 2 19 24 Freescale Semiconductor...
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...