EasyManuals Logo

NXP Semiconductors K22F series User Manual

NXP Semiconductors K22F series
1407 pages
To Next Page IconTo Next Page
To Next Page IconTo Next Page
To Previous Page IconTo Previous Page
To Previous Page IconTo Previous Page
Page #483 background imageLoading...
Page #483 background image
DMA_TCDn_BITER_ELINKNO field descriptions (continued)
Field Description
NOTE:
When the software loads the TCD, this field must be set equal to the corresponding CITER field;
otherwise, a configuration error is reported. As the major iteration count is exhausted, the
contents of this field are reloaded into the CITER field.
0 The channel-to-channel linking is disabled
1 The channel-to-channel linking is enabled
BITER Starting Major Iteration Count
As the transfer control descriptor is first loaded by software, this 9-bit (ELINK = 1) or 15-bit (ELINK = 0)
field must be equal to the value in the CITER field. As the major iteration count is exhausted, the contents
of this field are reloaded into the CITER field.
NOTE:
When the software loads the TCD, this field must be set equal to the corresponding CITER field;
otherwise, a configuration error is reported. As the major iteration count is exhausted, the
contents of this field is reloaded into the CITER field. If the channel is configured to execute a
single service request, the initial values of BITER and CITER should be 0x0001.
22.4 Functional description
The operation of the eDMA is described in the following subsections.
22.4.1
eDMA basic data flow
The basic flow of a data transfer can be partitioned into three segments.
As shown in the following diagram, the first segment involves the channel activation:
Chapter 22 Enhanced Direct Memory Access (eDMA)
K22F Sub-Family Reference Manual, Rev. 4, 08/2016
NXP Semiconductors 483

Table of Contents

Questions and Answers:

Question and Answer IconNeed help?

Do you have a question about the NXP Semiconductors K22F series and is the answer not in the manual?

NXP Semiconductors K22F series Specifications

General IconGeneral
BrandNXP Semiconductors
ModelK22F series
CategoryController
LanguageEnglish

Related product manuals