TCC76 Datasheet, PDF (161/259 Pages) List of Unclassifed Manufacturers – 32-bit RISC Microprocessor For Digital Media Player

TCC76x
Specification Rev. 0.07
32-bit RISC Microprocessor for Digital Media Player
February 23, 2005
DMA CONTROLLER
13 DMA CONTROLLER
13.1 Overview
The TCC76x has 2-channel DMA controller for data transfer. The DMA can be used to perform
high-speed transfers between external memory, on-chip memory, memory-mapped external
devices, and on-chip peripheral module. It’s possible to select channel priority levels with fixed
priority or round-robin priority.
The block diagram of DMA controller is in the following figure.
CHANNEL0
CHANNEL1
CHANNEL
R egisters
AH B I/F
C ontrol
s ig n a l
G enerator
S o u rc e /
A
D estinaton
H
A d d re s s
B
G enerator
B
Data Buffer
U
( 4 x 32 Fifo)
S
E x te rn a l
Request
S e le c to r
EREQ
13
In te rru p t
IR Q
G enerator
13
ACK
13
EOT
CHANNEL MUX
C H ANNEL ARBITER
Figure 13.1 DMA Controller Block Diagram
Preliminary
13-1