NXP Semiconductors KL25 Series - Page 14

Section number Title Page
Chapter 22
Direct Memory Access Multiplexer (DMAMUX)
22.1 Introduction...................................................................................................................................................................337
22.1.1 Overview......................................................................................................................................................337
22.1.2 Features........................................................................................................................................................338
22.1.3 Modes of operation......................................................................................................................................338
22.2 External signal description............................................................................................................................................339
22.3 Memory map/register definition...................................................................................................................................339
22.3.1 Channel Configuration register (DMAMUXx_CHCFGn)..........................................................................339
22.4 Functional description...................................................................................................................................................340
22.4.1 DMA channels with periodic triggering capability......................................................................................341
22.4.2 DMA channels with no triggering capability...............................................................................................343
22.4.3 Always-enabled DMA sources....................................................................................................................343
22.5 Initialization/application information...........................................................................................................................344
22.5.1 Reset.............................................................................................................................................................344
22.5.2 Enabling and configuring sources................................................................................................................344
Chapter 23
DMA Controller Module
23.1 Introduction...................................................................................................................................................................349
23.1.1 Overview......................................................................................................................................................349
23.1.2 Features........................................................................................................................................................350
23.2 DMA Transfer Overview..............................................................................................................................................351
23.3 Memory Map and Registers..........................................................................................................................................352
23.3.1 Source Address Register (DMA_SARn).....................................................................................................353
23.3.2 Destination Address Register (DMA_DARn).............................................................................................354
23.3.3 DMA Status Register / Byte Count Register (DMA_DSR_BCRn).............................................................355
23.3.4 DMA Control Register (DMA_DCRn)........................................................................................................357
23.4 Functional Description..................................................................................................................................................361
23.4.1 Transfer Requests (Cycle-Steal and Continuous Modes)............................................................................361
KL25 Sub-Family Reference Manual, Rev. 3, September 2012
14 Freescale Semiconductor, Inc.