SPC560P50L5 datasheet(14/112 Pages) STMICROELECTRONICS

14 / 112 page

Introduction

SPC560P44Lx, SPC560P50Lx

14/112

Doc ID 14723 Rev 9

The crossbar provides the following features:

●

4 master ports:

–

e200z0 core complex Instruction port

–

e200z0 core complex Load/Store Data port

–eDMA

–FlexRay

●

3 slave ports:

–

Flash memory (code flash and data flash)

–SRAM

–

Peripheral bridge

●

32-bit internal address, 32-bit internal data paths

●

Fixed Priority Arbitration based on Port Master

●

Temporary dynamic priority elevation of masters

1.5.3

Enhanced direct memory access (eDMA)

The enhanced direct memory access (eDMA) controller is a second-generation module

capable of performing complex data movements via 16 programmable channels, with

minimal intervention from the host processor. The hardware micro architecture includes a

DMA engine which performs source and destination address calculations, and the actual

data movement operations, along with an SRAM-based memory containing the transfer

control descriptors (TCD) for the channels. This implementation is utilized to minimize the

overall block size.

The eDMA module provides the following features:

●

16 channels support independent 8, 16 or 32-bit single value or block transfers

●

Supports variable sized queues and circular queues

●

Source and destination address registers are independently configured to either post-

increment or to remain constant

●

Each transfer is initiated by a peripheral, CPU, or eDMA channel request

●

Each eDMA channel can optionally send an interrupt request to the CPU on completion

of a single value or block transfer

●

DMA transfers possible between system memories, DSPIs, ADC, FlexPWM, eTimer

and CTU

●

Programmable DMA channel multiplexer for assignment of any DMA source to any

available DMA channel with as many as 30 request sources

●

eDMA abort operation through software

1.5.4

Flash memory

The SPC560P44Lx, SPC560P50Lx provides as much as 576 KB of programmable, non-

volatile, flash memory. The non-volatile memory (NVM) can be used for instruction and/or

data storage. The flash memory module interfaces the system bus to a dedicated flash

memory array controller. It supports a 32-bit data bus width at the system bus port, and a

128-bit read data interface to flash memory. The module contains four 128-bit wide prefetch

buffers. Prefetch buffer hits allow no-wait responses. Normal flash memory array accesses

are registered and are forwarded to the system bus on the following cycle, incurring two

wait-states.

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