參數(shù)資料
型號: TMS320DM355_07
廠商: Texas Instruments, Inc.
英文描述: Digital Media System-on-Chip (DMSoC)
中文描述: 數(shù)字媒體系統(tǒng)芯片(DMSoC)
文件頁數(shù): 88/158頁
文件大小: 1319K
代理商: TMS320DM355_07
www.ti.com
P
TMS320DM355
Digital Media System-on-Chip (DMSoC)
SPRS463B–SEPTEMBER 2007–REVISED OCTOBER 2007
The EDMA Controller consists of two major blocks: the Transfer Controller (TC) and the Channel
Controller (CC). The CC is a highly flexible Channel Controller that serves as the user interface and event
interface for the EDMA system. The CC supports 64-event channels and 8 QDMA channels. The CC
consists of a scalable Parameter RAM (PaRAM) that supports flexible ping-pong, circular buffering,
channel-chaining, auto-reloading, and memory protection.
The EDMA Channel Controller has the following features:
Fully orthogonal transfer description
Three transfer dimensions
A-synchronized transfers: one dimension serviced per event
AB- synchronized transfers: two dimensions serviced per event
Independent indexes on source and destination
Chaining feature allows 3-D transfer based on single event
Flexible transfer definition
Increment and constant addressing modes
Linking mechanism allows automatic PaRAM set update
Chaining allows multiple transfers to execute with one event
Interrupt generation for:
DMA completion
Error conditions
Debug visibility
Queue watermarking/threshold
Error and status recording to facilitate debug
64 DMA channels
Event synchronization
Manual synchronization (CPU(s) write to event set register)
Chain synchronization (completion of one transfer chains to next)
8 QDMA channels
QDMA channels are triggered automatically upon writing to a PaRAM set entry
Support for programmable QDMA channel to PaRAM mapping
128 PaRAM sets
Each PaRAM set can be used for a DMA channel, QDMA channel, or link set (remaining)
Two transfer controllers/event queues. The system-level priority of these queues is user programmable
16 event entries per event queue
External events (for example, ASP TX Evt and RX Evt)
The EDMA Transfer Controller has the following features:
Two transfer controllers
64-bit wide read and write ports per channel
Up to four in-flight transfer requests (TR)
Programmable priority level
Supports two dimensional transfers with independent indexes on source and destination (EDMA3CC
manages the 3rd dimension)
Support for increment and constant addressing modes
Interrupt and error support
Parameter RAM: Each EDMA is specified by an eight word (32-byte) parameter table contained in
Parameter RAM (PaRAM) within the CC. DM355 provides 128 PaRAM entries, one for each of the 64
DMA channels and for 64 QDMA / Linked DMA entries.
Detailed Device Description
88
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