EM6A8160TSA
EtronTech
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.
Table 6. Addressing Mode
A3
0
Addressing Mode
Sequential
1
Interleave
Burst Definition, Addressing Sequence of Sequential and Interleave Mode
•
Table 7: Burst Address ordering
Burst
Length
Start Address
Sequential
Interleave
A2
A1
X
X
0
A0
X
X
X
X
X
X
0
0
0
0
1
1
1
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0, 1
1, 0
0, 1, 2, 3
1, 2, 3, 0
2, 3, 0, 1
3, 0, 1, 2
0, 1
1, 0
0, 1, 2, 3
1, 0, 3, 2
2, 3, 0, 1
3, 2, 1, 0
2
4
0
1
1
0
0
1
1
0
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
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
8
0
1
1
Latency Field (A6~A4)
•
CAS
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 Latency depends on the frequency of CK. The minimum whole value
CAS
satisfying the following formula must be programmed into this field.
tCAC (min) ≤ CAS Latency X tCK
Table 8. CAS Latency
A6
0
A5
0
A4
0
CAS Latency
Reserved
Reserved
Reserved
3 clocks
0
0
1
0
1
0
0
1
1
1
0
0
Reserved
Reserved
Reserved
Reserved
1
0
1
1
1
0
1
1
1
Etron Confidential
7
Rev 1.2
Apr. 2009
ETRON [ ETRON TECHNOLOGY, INC. ]
