TC1797_14 Datasheet, PDF (22/192 Pages) Infineon Technologies AG – 32-Bit Single-Chip Microcontroller

TC1797
Introduction
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
• Register set for each DMA channel
Data Sheet
18
V1.3, 2014-08