Motorola MPC533 Reference Manual page 805

MPWM[0]
GPDO[15]
MDA[14]
GPDO[0]
Figure 18-3. Internal Multiplexer Mechanism for Transmit Data
MPWM[0]
MDA[14]
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 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.
Figure 18-5 shows examples of PPM_TCLK in SPI and TDM modes. The frequency of
MOTOROLA
PRELIMINARY—SUBJECT TO CHANGE WITHOUT NOTICE
TX_CONFIG[CH0]
TX_CONFIG[CH15]
RX_CONFIG[CH0]
RX_CONFIG[CH15]
Chapter 18. Peripheral Pin Multiplexing (PPM) Module
TX_SHIFTER
CH15
• • •
RX_SHIFTER
CH15 • • •
RX_DATA
CH15
• • •
RX_CONFIG[CHx]
GPDI
• • •
CH15
Functional Description
PPM_TX[0:1]
CH0
PPM_RX[0:1]
CH0
•
CH0
CH0
18-5