EtronTech
Table 6. Addressing Mode
A3
0
1
Addressing Mode
Sequential
Interleave
EM6AA160TSA
•
Addressing Mode Select Field (A3)
The Addressing Mode can be one of two modes, either Interleave Mode or Sequential Mode. Both Sequential
Mode and Interleave Mode support burst length of 2, 4 and 8.
•
Burst Definition, Addressing Sequence of Sequential and Interleave Mode
Table 7. Burst Address ordering
Burst Length
2
A2
X
X
X
X
X
X
0
0
0
0
1
1
1
1
Start Address
A1
X
X
0
0
1
1
0
0
1
1
0
0
1
1
A0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
Sequential
0, 1
1, 0
0, 1, 2, 3
1, 2, 3, 0
2, 3, 0, 1
3, 0, 1, 2
0, 1, 2, 3, 4, 5, 6, 7
1, 2, 3, 4, 5, 6, 7, 0
2, 3, 4, 5, 6, 7, 0, 1
3, 4, 5, 6, 7, 0, 1, 2
4, 5, 6, 7, 0, 1, 2, 3
5, 6, 7, 0, 1, 2, 3, 4
6, 7, 0, 1, 2, 3, 4, 5
7, 0, 1, 2, 3, 4, 5, 6
Interleave
0, 1
1, 0
0, 1, 2, 3
1, 0, 3, 2
2, 3, 0, 1
3, 2, 1, 0
0, 1, 2, 3, 4, 5, 6, 7
1, 0, 3, 2, 5, 4, 7, 6
2, 3, 0, 1, 6, 7, 4, 5
3, 2, 1, 0, 7, 6, 5, 4
4, 5, 6, 7, 0, 1, 2, 3
5, 4, 7, 6, 1, 0, 3, 2
6, 7, 4, 5, 2, 3, 0, 1
7, 6, 5, 4, 3, 2, 1, 0
4
8
•
CAS Latency Field (A6~A4)
This field specifies the number of clock cycles from the assertion of the Read command to the first read data.
The minimum whole value of CAS Latency depends on the frequency of CK. The minimum whole value
satisfying the following formula must be programmed into this field.
t
CAC
(min)
≤
CAS Latency X t
CK
Table 8. CAS Latency
A6
0
0
0
0
1
1
1
1
A5
0
0
1
1
0
0
1
1
A4
0
1
0
1
0
1
0
1
CAS Latency
Reserved
Reserved
Reserved
3 clocks
Reserved
Reserved
2.5 clocks
Reserved
Etron Confidential
7
Rev. 1.2
May 2009
ETRON [ ETRON TECHNOLOGY, INC. ]
