Analog Devices SHARC ADSP-21368 - Page 155

ADSP-21368 SHARC Processor Hardware Reference 3-47
External Port
Figure 3-7. Uniprocessor System With Multiple Buffered SDRAM
Devices
SDRAM #8
4X4X4
DATA[3:0]
DQM
SDRAM #7
4X4X4
SDRAM #6
4X4X 4
DATA[ 31-0 ]
ADSP-21367
MS3
RAS
CAS
SDWE
SDCLK
SDCKE
C
O
N
T
R
O
L
REGISTERE D
BUFFERS
I0
I5
I4
I2
I1
O0A
O4A
O3A
O2A
O1A
IX[14:0]
OXA[14:0]
OXB[14:0]
RAS
CAS
WE
CLK
CKE
SDRAM #5
4X4X4
DATA [3:0]
A[14:0]
CS
DATA[3:0]
AB[15:1]
AA[15:1]
DQ
DQ
ADDR [15]
CTRL [6]
21
21
SDRAM BANK 1
ADDR & CTRL
SDRAM BANK 2
ADDR & CTRL
DATA[3 :0]
A
D
D
R
E
S
S
A[15:11]
A[9:1]
SDA10
A17
A18
DQM
DQM
DQM
DATA [31:28]
DATA [19:16]
DATA [ 23 :2 0]
O0B
O4B
O3B
O2B
O1B
TO SDRAM #1, 2, 3, 4
4X4X4
DATA
[
1
5
:12
]
DATA [7:4]
DATA [11:8]
DATA [3:0]
DATA [27:24]