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S71GS256 bảng dữ liệu(PDF) 119 Page - SPANSION |
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S71GS256 bảng dữ liệu(HTML) 119 Page - SPANSION |
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119 / 195 page ![]() 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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