Datasheet

Overview

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36.1 Overview

This document describes the functionality of the RAM trace port (RTP) module, which provides the

features to datalog the RAM contents of the devices or accesses to peripherals without program intrusion.

It can trace all data write or read accesses to internal RAM. In addition, it provides the capability to directly

transfer data to a FIFO to support a CPU-controlled transmission of the data. The trace data is transmitted

over a dedicated external interface.

36.1.1 Features

The RTP offers the following features:

• Two modes of operation - Trace Mode and Direct Data Mode

– Trace Mode (Section 36.2.1)

• Non-intrusive data trace on write or read operation

• Visibility of RAM content at any time on external capture hardware

• Trace of peripheral accesses

• 2 configurable trace regions for each RAM module to limit amount of data to be traced

• FIFO to store data and address of data of multiple read/write operations

• Trace of CPU and/or DMA accesses with indication of the master in the transmitted data packet

– Direct Data Mode (Section 36.2.2)

• Directly write data with the CPU or trace read operations to a FIFO, without transmitting header

and address information

• Dedicated synchronous interface to transmit data to external devices

• Free-running clock generation or clock stop mode between transmissions

• up to 100 Mbit per sec/pin transfer rate for transmitting data (up to 100MB/s; see device datasheet for

maximum transmission clock frequency)

• Pins not used in functional mode can be used as GIOs

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RAM Trace Port (RTP) SPNU562–May 2014

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