TC1797 datasheet(22/190 Pages) INFINEON

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TC1797

Introduction

Data Sheet

V1.1, 2009-04

2.3

On-Chip System Units

The TC1797 microcontroller offers several versatile on-chip system peripheral units

such as DMA controller, embedded Flash module, interrupt system and ports.

2.3.1

Flexible Interrupt System

The TC1797 includes a programmable interrupt system with the following features:

Features

•

Fast interrupt response

•

Independent interrupt systems for CPU and PCP

•

Each SRN can be mapped to the CPU or PCP interrupt system

•

Flexible interrupt-prioritizing scheme with 255 interrupt priority levels per interrupt

system

2.3.2

Direct Memory Access Controller

The TC1797 includes a fast and flexible DMA controller with 16 independant DMA

channels (two DMA Move Engines).

Features

•

8 independent DMA channels

– 8 DMA channels in the DMA Sub-Block

– Up to 16 selectable request inputs per DMA channel

– 2-level programmable priority of DMA channels within the DMA Sub-Block

– Software and hardware DMA request

– Hardware requests by selected on-chip peripherals and external inputs

•

3-level programmable priority of the DMA Sub-Block at the on chip bus interfaces

•

Buffer capability for move actions on the buses (at least 1 move per bus is buffered)

•

Individually programmable operation modes for each DMA channel

– Single Mode: stops and disables DMA channel after a predefined number of DMA

transfers

– Continuous Mode: DMA channel remains enabled after a predefined number of

DMA transfers; DMA transaction can be repeated

– Programmable address modification

– Two shadow register modes (with / w/o automatic re-set and direct write access).

•

Full 32-bit addressing capability of each DMA channel

– 4 Gbyte address range

– Data block move supports > 32 Kbyte moves per DMA transaction

– Circular buffer addressing mode with flexible circular buffer sizes

•

Programmable data width of DMA transfer/transaction: 8-bit, 16-bit, or 32-bit

•

TC1797 Datasheet(PDF) 22 Page - Infineon Technologies AG

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