AMD Elan SC520 - Figure 14-1 GP-DMA Controller Block Diagram

GP Bus DMA Controller
14-2 Élan™SC520 Microcontroller User’s Manual
Figure 14-1 GP-DMA Controller Block Diagram
Channel
Mapping
GPTC*
dior
diow
GPAEN*
GPDRQ3
– GPDRQ0
GPDACK3
– GPDACK0*
rxdrq[1–0]
txdrq[1–0]
rxdack[1–0]
txdack[1
–0]
GPA25
–
GPA0
GPD15
–
GPD0
GP-DMA Controller
UARTs
dramrd
dramwr
addr[27–0]
Bus
breq
bgnt
dmemw
dmemr
GP Bus
daddr[27–0]
Élan™SC520 Microcontroller
Interface
Unit
Target
Control
(SDRAM)
Initiator
Control
(I/O)
GP Bus
I/O
Configuration
Registers
dack7
–dack5
drq7–drq5
drq3–drq0
dack3
–dack0
Master Core
Slave Core
dma_is_16
*Multiplexed pins