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S71GS256 Datasheet(PDF) 119 Page - SPANSION

Part # S71GS256
Description  128N based MCPs
PDF  195 Pages
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Manufacturer  SPANSION [SPANSION]
Direct Link  http://www.spansion.com
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S71GS256 Datasheet(HTML) 119 Page - SPANSION

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October 4, 2004 cellRAM_00_A0
CellularRAM Type 2
119
Ad vance
Info rmat i o n
Burst Length (BCR[2:0]): Default = Continuous Burst
Burst lengths define the number of words the device outputs during burst READ
operations. The device supports a burst length of 4, 8, or 16 words. The device
can also be set in continuous burst mode where data is accessed sequentially
without regard to address boundaries. Enabling burst no-wrap with BCR[3] = 1
overrides the burst-length setting.
Burst Wrap (BCR[3]): Default = No Wrap
The burst-wrap option determines if a 4-, 8-, or 16-word READ burst wraps within
the burst length or steps through sequential addresses. If the wrap option is not
enabled, the device accesses data from sequential addresses without regard to
burst boundaries. When continuous burst operation is selected, the internal ad-
dress wraps to 000000h if the burst goes past the last address. Enabling burst
nowrap (BCR[3] = 1) overrides the burst-length setting.
Table 19. Sequence and Burst Length
BURST WRAP
STARTING
ADDRESS
4-WORD
BURST
LENGTH
8-WORD BURST
LENGTH
16-WORD BURST LENGTH
CONTINUOUS
BURST
BCR[3]
WRAP (DECIMAL)
LINEAR
LINEAR
LINEAR
LINEAR
0Yes
0
0-1-2-3
0-1-2-3-4-5-6-7
0-1-2-3-4-5-6-7-8-9-10-11-12-13-14-15
0-1-2-3-4-5-6-…
1
1-2-3-0
1-2-3-4-5-6-7-0
1-2-3-4-5-6-7-8-9-10-11-12-13-14-15-0
1-2-3-4-5-6-7-…
2
2-3-0-1
2-3-4-5-6-7-0-1
2-3-4-5-6-7-8-9-10-11-12-13-14-15-0-1
2-3-4-5-6-7-8-…
3
3-0-1-2
3-4-5-6-7-0-1-2
3-4-5-6-7-8-9-10-11-12-13-14-15-0-1-2
3-4-5-6-7-8-9-…
4
4-5-6-7-0-1-2-3
4-5-6-7-8-9-10-11-12-13-14-15-0-1-2-3
4-5-6-7-8-9-10-…
5
5-6-7-0-1-2-3-4
5-6-7-8-9-10-11-12-13-14-15-0-1-2-3-4
5-6-7-8-9-10-11-…
6
6-7-0-1-2-3-4-5
6-7-8-9-10-11-12-13-14-15-0-1-2-3-4-5
6-7-8-9-10-11-12-…
7
7-0-1-2-3-4-5-6
7-8-9-10-11-12-13-14-15-0-1-2-3-4-5-6
7-8-9-10-11-12-13-…
…
…
…
14
14-15-0-1-2-3-4-5-6-7-8-9-10-11-12-13
14-15-16-17-18-19-20-…
15
15-0-1-2-3-4-5-6-7-8-9-10-11-12-13-14
15-16-17-18-19-20-21…
1No
0
0-1-2-3
0-1-2-3-4-5-6-7
0-1-2-3-4-5-6-7-8-9-10-11-12-13-14-15
0-1-2-3-4-5-6-…
1
1-2-3-4
1-2-3-4-5-6-7-8
1-2-3-4-5-6-7-8-9-10-11-12-13-14-15-16
1-2-3-4-5-6-7-…
2
2-3-4-5
2-3-4-5-6-7-8-9
2-3-4-5-6-7-8-9-10-11-12-13-14-15-16-17
2-3-4-5-6-7-8-…
3
3-4-5-6
3-4-5-6-7-8-9-10
3-4-5-6-7-8-9-10-11-12-13-14-15-16-17-18
3-4-5-6-7-8-9-…
4
4-5-6-7-8-9-10-11
4-5-6-7-8-9-10-11-12-13-14-15-16-17-18-19
4-5-6-7-8-9-10-…
5
5-6-7-8-9-10-11-12
5-6-7-8-9-10-11-12-13-…-15-16-17-18-19-20
5-6-7-8-9-10-11…
6
6-7-8-9-10-11-12-13
6-7-8-9-10-11-12-13-14-…-16-17-18-19-20-21
6-7-8-9-10-11-12…
7
7-8-9-10-11-12-13-14
7-8-9-10-11-12-13-14-…-17-18-19-20-21-22
7-8-9-10-11-12-13…
…
…
…
14
14-15-16-17-18-19-…-23-24-25-26-27-28-29
14-15-16-17-18-19-20-…
15
5-16-17-18-19-20-…-24-25-26-27-28-29-30
15-16-17-18-19-20-21-…



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