The Set Burst with Wrap instruction is used to access a fixed-length section of data that is 8, 16, 32 or 64 bytes within a 256-byte page. In SPI mode, the operation is initiated by issuing the 8-bit command 77H, followed by 24 dummy bits and eight wrap configuration bits W[7:0]. Refer to
Table 5-13 for the definition and function of the wrap bits. Wrap bit W7 and the lower nibble W[3:0] are reserved and not used. Once bits W[6:4] are configured through the Set Burst with Wrap instruction, all subsequent Fast Read Quad I/O and Word Read Quad I/O operations use the selected W[6:4] setting to perform wrapped access within an 8-byte, 16-byte, 32-byte or 64-byte section of any page. To exit Wrap Around mode and return to standard sequential read operation, another Set Burst with Wrap instruction must be issued with W4 set to
1. The default value of W4 after power-up or after a software or hardware reset is
1.
Table 5-13. Set Burst with Wrap in SPI| W6 | W5 | Wrap Length (Bytes) | Wrap Around Enabled |
|---|
W4 = 0 | W4 = 1 (Default) |
|---|
0 | 0 | 8 | Yes | No |
0 | 1 | 16 | Yes | No |
1 | 0 | 32 | Yes | No |
1 | 1 | 64 | Yes | No |
