DMA CONTROLLERPROBLEM TO BE SOLVED: To hold data consistency of a cache memory and a real memory and to reduce CPU processing loads. SOLUTION: A DMA (direct memory access) controller for controlling data transfe
[3] Samsung Electronics.S3C6410X RISC microprocessor user's manual[R].2008. [4] HESSEL S,SZCZESNY D,BRUNS F,et al.Architectural analysis of a smart DMA controller for protocol stack acceleration in LTE terminals[C].The Sixteenth IEEE International Conference on Embedded and Real-Time Computing ...
CASCADED 82C37As When programming cascaded controllers, start with the first level device (closest to the microprocessor). After RESET, the DACK outputs are programmed to be active low and are held in the high state. If they are used to drive HLDA directly, the second level device(s) ...
The DMA works when the transfer is started from the Linux userspace by writing GO bit (2^3) to the CONTROL register (offset 6 in the /dev/mem memory-mapped space of the controller's control_port_slave on the AXI bus). The CONTROL register contains interrupt enable bit (2^4) b...
A microprocessor with a DMA controller for performing data transfers between a peripheral unit and a memory in response to a transfer request from the peripheral unit. The DMA controller includes a fi
The peripheral request interfaces support the connection of DMA-capable peripherals to enable memory-to-peripheral and peripheral-to-memory DMA transfers to occur, without intervention from a microprocessor. Dual APB interfaces enable the operation of the DMAC to be partitioned into the Secure state ...
Then the microprocessor tri-states all the data bus, address bus, and control bus. The CPU leaves the control over bus and acknowledges the HOLD request through HLDA signal. Now the CPU is in HOLD state and the DMA controller has to manage the operations over busesbetween the CPU, memory,...
A microprocessor with a DMA controller for performing data transfers between a peripheral unit and a memory in response to a transfer request from the peripheral unit. The DMA controller includes a first memory block for storing information necessary to perform a current DMA data transfer and a se...
If I'm working on a microprocessor with a "free" DMA controller (one built onto the chip), I'll sometimes use it for large memory transfers. This is especially useful with processors with segmented address spaces, like the 80188 or Z180 (the Z180's space is not actually segmented, but...
A single chip digital signal processor (DSP) includes memory mapped resources and an on-chip direct memory access controller (DMAC). The memory mapped resources of the DSP include an on-chip program m