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W25Q16DVDAIG-TR Datasheet(PDF) 39 Page - Winbond |
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W25Q16DVDAIG-TR Datasheet(HTML) 39 Page - Winbond |
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39 / 80 page  Publication Release Date: January 26, 2015 - 39 - Revision J 7.2.18 Set Burst with Wrap (77h) The Set Burst with Wrap (77h) instruction is used in conjunction with “Fast Read Quad I/O” and “Word Read Quad I/O” instructions to access a fixed length of 8/16/32/64-byte section within a 256-byte page. Certain applications can benefit from this feature and improve the overall system code execution performance. Similar to a Quad I/O instruction, the Set Burst with Wrap instruction is initiated by driving the /CS pin low and then shifting the instruction code “77h” followed by 24 dummy bits and 8 “Wrap Bits”, W7-0. The instruction sequence is shown in Figure 17. Wrap bit W7 and the lower nibble W3-0 are not used. W6, W5 W4 = 0 W4 =1 (DEFAULT) Wrap Around Wrap Length Wrap Around Wrap Length 0 0 Yes 8-byte No N/A 0 1 Yes 16-byte No N/A 1 0 Yes 32-byte No N/A 1 1 Yes 64-byte No N/A Once W6- 4 is set by a Set Burst with Wrap instruction, all the following “Fast Read Quad I/O” and “Word Read Quad I/O” instructions will use the W6-4 setting to access the 8/16/32/64-byte section within any page. To exit the “Wrap Around” function and return to normal read operation, another Set Burst with Wrap instruction should be issued to set W4 = 1. The default value of W4 upon power on is 1. In the case of a system Reset while W4 = 0, it is recommended that the controller issues a Set Burst with Wrap instruction to reset W4 = 1 prior to any normal Read instructions since W25Q16DV does not have a hardware Reset Pin. Wrap Bit /CS CLK Mode 0 Mode 3 0 1 IO 0 IO 1 IO 2 IO 3 2 3 4 5 X X X X X X X X don't care 6 7 8 9 don't care don't care 10 11 12 13 14 15 Instruction (77h) Mode 0 Mode 3 X X X X X X X X X X X X X X X X w4 X w5 X w6 X X X Figure 17. Set Burst with Wrap Instruction Sequence |
Similar Part No. - W25Q16DVDAIG-TR |
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