ZHCSHE0 December 2017 TMS320F28377D-EP
The uPP interface is a high-speed parallel interface with dedicated data lines and minimal control signals. The uPP interface is designed to interface cleanly with high-speed ADCs or DACs with 8-bit data width. It can also be interconnected with field-programmable gate arrays (FPGAs) or other uPP devices to achieve high-speed digital data transfer. It can operate in receive mode or transmit mode (simplex mode).
The uPP interface includes an internal DMA controller to maximize throughput and minimize CPU overhead during high-speed data transmission. All uPP transactions use internal DMA to feed data to or retrieve data from the I/O channels. Even though there is only one I/O channel, the DMA controller includes two DMA channels to support data interleave mode, in which all DMA resources service a single I/O channel.
On this device, the uPP interface is the dedicated resource for the CPU1 subsystem. CPU1, CPU1.CLA1, and CPU1.DMA have access to this module. Two dedicated 512-byte data RAMs (also known as MSG RAMs) are tightly coupled with the uPP module (one for each, TX and RX). These data RAMs are used to store the bulk of data to avoid frequent interruptions to the CPU. Only CPU1 and CPU1.CLA1 have access to these data RAMs. Figure 4-78 shows the integration of the uPP on this device.
On some TI devices, the uPP module is also called the Radio Peripheral Interface (RPI) module.
The uPP interface supports the following:
Figure 4-79 shows the uPP functional block diagram.