is42sm16800g-6bli Integrated Silicon Solution, Inc., is42sm16800g-6bli Datasheet - Page 6

• Manufacturer Part Number: is42sm16800g-6bli
• Description: 2m X 16bits X 4banks Mobile Synchronous Dram
• Manufacturer: Integrated Silicon Solution, Inc.

Figure4: Mode Register Definition
Table 3: Burst Definition
Burst Type
selected via bit M3. The ordering of accesses within a burst is determined by the burst length, the burst type and the starting column
address, as shown in Table 3.
M9
Length
Accesses within a given burst may be programmed to be either sequential or interleaved; this is referred to as the burst type and is
Rev. 00A | Dec. 2010
Burst
0
1
Note: M13/M12(BA1/BA0) must be set to “0/0” to select Mode Register (vs. the Extended Mode Register)
Page
Full
4
8
2
Burst Read and Burst Write
Burst Read and Single Write
Write Burst Mode
Starting Column
(Location 0-511)
A2
0
0
0
0
1
1
1
1
0
13
Address
n=A0-8
BA1
A1
0
0
1
1
0
0
1
1
0
0
1
1
0
12
BA0
A0
0
1
0
1
0
1
0
1
0
1
1
0
1
0
0
11
A11
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
C
Order of Access Within a Burst
0-1-2-3-4-5-6-7
1-2-3-4-5-6-7-0
6-7-0-1-2-3-4-5
7-0-1-2-3-4-5-6
C
n
Sequential
…C
, C
n
0
+3, C
10
0-1-2-3
1-2-3-0
2-3-0-1
3-0-1-2
n
n
+1. C
A10
0-1
1-0
-1, C
M6
0
0
0
0
1
1
1
1
WB
n
+4…
n
9
n
...
M5
+2,
A9
0
0
1
1
0
0
1
1
0
M4
8
0
1
0
1
0
1
0
1
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
A8
Not Supported
Interleaved
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0-1-2-3
1-0-3-2
2-3-0-1
3-2-1-0
CAS Latency
0
7
0-1
1-0
Reserved
Reserved
Reserved
Reserved
Reserved
A7
2
3
-
6
CAS Latency
A6
- [e-mail]
5
A5
M3
0
1
4
Note :
1. For full-page accesses: y = 512
2. For a burst length of two, A1-A8 select the block-
3. For a burst length of four, A2-A8 select the block-
4. For a burst length of eight, A3-A8 select the
5. For a full-page burst, the full row is selected and A0-A8
6. Whenever a boundary of the block is reached within a
7. For a burst length of one, A0-A8 select the unique
A4
Burst Type
block.
the block.
within the block.
select the starting column.
within the block.
ignored.
of-two burst; A0 selects the starting column within the
of-four burst; A0-A1 select the starting column within
block-of-eight burst; A0-A2 select the starting column
given sequence above, the following access wraps
column to be accessed, and mode register bit M3 is
Sequential
Interleave
BT
3
A3
2
Burst Length
A2
1
A1
M2
0
0
0
0
1
1
1
1
IS42SM/RM/VM16800G
0
A0
M1
0
0
1
1
0
0
1
1
M0
Address Bus
Mode Register (Mx)
0
1
0
1
0
1
0
1
Advanced Information
Reserved
Reserved
Reserved
Full Page
M3 = 0
1
2
4
8
Burst Length
Reserved
Reserved
Reserved
Reserved
M3 = 1
1
2
4
8
6