Analog Devices ADSP-BF535 Blackfin, Hardware Reference Manual

Page: 728 / 1022

Internal Memory Interfaces
18-4 ADSP-BF535 Blackfin Processor Hardware Reference
Internal Memory Interfaces
The EBIU functions as a slave on three buses internal to the ADSP-BF535
processor:
• External Access Bus (EAB), mastered by the System Bus Interface
Unit (SBIU) on behalf of external bus requests from the core or the
DMA bus or mastered by the MemDMA controller.
• External Mastered Bus (EMB), mastered by the PCI bridge.
• Peripheral Access Bus (PAB), mastered by the SBIU on behalf of
system MMR requests from the core or from the PCI master.
Figure 18-2. External Bus Interface Unit (EBIU)
ABE [2:0]/SDQM [2:0]
EBIU
ASYNCHRONOUS
MEMORY
CONTROLLER
(AMC)
SDRAM
CONTROLLER
(SDC)
E
X
T
E
R
N
A
L
B
U
S
C
O
N
T
R
O
L
L
E
R
(E
B
C
)
EAB
EMB
PAB
E
B
IU
P
O
R
T
DATA [31:0]
ADDR [25:2]
ABE [3]/SDQM [3]/ADDR[1]
CLKOUT/SCLK [1]
AMS [3:0]
ARDY
AOE
ARE
AWE
SMS [3:0]
SCLK [0]
SCKE
SA10
SRAS
SCAS
SWE