em636165 Etron Technology Inc., em636165 Datasheet - Page 14

• Manufacturer Part Number: em636165
• Description: 1m X 16 Bit Synchronous Dram Sdram
• Manufacturer: Etron Technology Inc.

Etron Confidential
•
•
•
Burst Length
Burst Definition, Addressing Sequence of Sequential and Interleave Mode
Full page
Addressing Mode Select Field (A3)
The Addressing Mode can be one of two modes, Interleave Mode or Sequential Mode.
Sequential Mode supports burst length of 1, 2, 4, 8, or full page, but Interleave Mode only
supports burst length of 4 and 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 CLK. The minimum whole value satisfying the following formula must be programmed
into this field.
2
4
8
A3
A6
0
1
0
0
0
0
1
location = 0-255
A2
X
X
X
X
X
X
0
0
0
0
1
1
1
1
Start Address
Addressing Mode
A5
Sequential
X
0
0
1
1
Interleave
A1
X
X
t
0
0
1
1
0
0
1
1
0
0
1
1
CAC
(min) ≤ CAS# Latency X t
A0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
A4
X
0
1
0
1
n, n+1, n+2, n+3, …255, 0,
1, 2, … n-1, n, …
14
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
CAS# Latency
Sequential
0, 1, 2, 3
1, 2, 3, 0
2, 3, 0, 1
3, 0, 1, 2
Reserved
Reserved
Reserved
2 clocks
3 clocks
0, 1
1, 0
CK
Rev. 3.4
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
EM636165
Not Support
Interleave
0, 1, 2, 3
1, 0, 3, 2
2, 3, 0, 1
3, 2, 1, 0
0, 1
1, 0
Apr. 2008