BA612A - AHB Multi-Channel DMA controller
Description
The BA612A is a configurable Multi-Channel AHB-lite DMA Controller. This core is a tiny solution which is able however to perform high-throughput DMA transfers.
General Description
The BA612A supports the following transfer types and transfer modes:
Transfer types
- memory to memory
- peripheral to memory
- memory to peripheral
Transfer modes
- Basic
- Auto-Request
- Ping-Pong
DMA Block transfers are automatically splitted into several DMA Burst transfers. The Burst Length (BL) is programmable separately for each channel.
Any DMA Burst transfer is executed as follows:
- The DMA Controller downloads channel parameters from the system memory if needed (when executing alternate Burst Transfers on different channels or starting a new Block transfer)
- One burst of data is transfered from the source into the internal FIFO
- Data stored in the internal FIFO are transfered to the destination
- Arbitration is done after each Burst transfer
An interrupt is generated when the entire DMA Block transfer is terminated. If needed, the length of the last burst is adapted.
Resources
- Typical configuration with 8 channels: 250MHz – 10kgates in ASIC TSMC 90nm
Reference:
BA612A Features
- AMBA AHB-lite compliant DMA transfers
- Supports multiple transfer types: memory to memory, peripheral to memory, memory to peripheral
- Number of DMA channels configurable
- Supports Basic, Auto-request & Ping-Pong Transfer Modes
- Low gate count solution with channel parameters stored in system memory:
- Programmable burst length for each channel
- Programmable transfer width for each channel
- Programmable transfer type for each channel
- Programmable transfer mode for each channel
- Programmable transfer size for each channel
- Source & Destination addresses
- All other parameters programmable through APB Interface
- Fixed priority or round-robin scheme
- Best trade-off performance/area by defining generic parameters before synthesis
