EasyManua.ls Logo

Texas Instruments C2000

Texas Instruments C2000
342 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
Loading...
Direct Memory Access (DMA)
C2000 Microcontroller Workshop - Direct Memory Access Controller 9 - 9
Priority Modes and the State Machine
Read/Write Data
Add Burst Step
to Address
Pointer
Add Transfer
Step to Address
Pointer
Moved
“Burst Size”
Words?
Moved
“Transfer Size”
Bursts?
Y
Y
N
N
Point where other
pending channels
are serviced
Wait for event
to start/continue
transfer
Point where
CH1 can
interrupt other
channels in
CH1 Priority Mode
Start Transfer
End Transfer
DMA Throughput
DMA Throughput
4 cycles/word
(5 for McBSP reads)
1 cycle delay to start each burst
1 cycle delay returning from CH1
high priority interrupt
32-bit transfer doubles throughput
(except McBSP, which supports 16-bit transfers only)
Example: 128 16-bit words from ADC to RAM
8 bursts * [(4 cycles/word * 16 words/burst) + 1] = 520 cycles
Example: 64 32-bit words from ADC to RAM
8 bursts * [(4 cycles/word * 8 words/burst) + 1] = 264 cycles

Table of Contents

Other manuals for Texas Instruments C2000

Related product manuals