15-1
MB86R02 ‘Jade-D’ Hardware Manual V1.64
15 DMA Controller (DMAC)
This chapter describes the functionality and operation of the DMA Controller.
15.1 Outline
The DMAC is an 8-channel DMA controller.
15.2 Feature
DMAC in MB86R02 has following features:
•
Compliant with AMBA v2.0
•
8 DMA channels
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DMA trigger
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External transfer request (2 channels for external DMA request and 2 channels for I2S
transmission/reception DMA requests are available). Note that although I2S is an
internal peripheral, its DMA requests are handled as external.
•
Peripheral transfer request (12 types of UART transmission/reception DMA request
selectable per channel)
•
Software request (start-up by register write)
•
Beat transfer
16-word FIFO shared by all channels
Supports INCR, INCR 4/8/16, and WRAP 4/8/16.
•
Transfer modes:
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Block transfer (I2S: check 'Limitations with I2S' section)
•
Burst transfer (not to I2S!)
•
Demand transfer (not to I2S!)
•
Programmable 4 bit block register and 16 bit count register
•
Supports 8, 16, and 32 bit transfer widths
•
Supports increment and fixed addressing to source and destination
•
Reload count, source address and destination address register
•
Issues interrupts on errors and completion
•
Displays end code of DMA transfer
•
Supports source and destination protection
•
Hardware support for fixed priority and rotation priority
In fixed priority mode, channel 0 has the highest and channel 7 has the lowest priority
Summary of Contents for MB86R02
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Page 497: ...18 139 MB86R02 Jade D Hardware Manual V1 64 VSYNC is output 1 dot clock faster than HSYNC ...
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