4.2
Interrupt Controller...........................................................................................................4-20
4.2.1
4.2.2
4.3
Real-Time Clock (RTC) ...................................................................................................4-28
4.3.1
4.3.2
4.3.3
Trim Procedure ...................................................................................................4-32
4.4
4.4.1
4.4.2
4.5
Pulse Width Modulator.....................................................................................................4-38
4.5.1
4.5.2
Register Descriptions..........................................................................................4-40
4.5.3
4.6
4.6.1
4.6.2
4.6.3
4.6.4
4.6.5
5
DMA Controller .............................................................................................................................5-1
5.1
DMA Description................................................................................................................5-1
5.1.1
DMAC Channels ...................................................................................................5-2
5.1.2
Signal Descriptions ...............................................................................................5-2
5.1.3
5.1.4
DMA Descriptors...................................................................................................5-5
5.1.5
Channel States .....................................................................................................5-8
5.1.6
Read and Write Order...........................................................................................5-9
5.1.7
Byte Transfer Order ..............................................................................................5-9
5.1.8
Trailing Bytes ......................................................................................................5-10
5.2
Transferring Data.............................................................................................................5-11
5.2.1
5.2.2
5.2.3
5.2.4
5.3
DMAC Registers ..............................................................................................................5-17
5.3.1
5.3.2
5.3.3
5.3.4
5.3.5
5.3.6
5.3.7
5.4
Examples .........................................................................................................................5-26
5.5
6
Memory Controller ........................................................................................................................6-1
6.1
Overview............................................................................................................................6-1
6.2
Functional Description .......................................................................................................6-2
Intel® PXA255 Processor Developer's Manual
Contents
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