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IS25LP032D-RBLA3:P bảng dữ liệu(PDF) 98 Page - Integrated Silicon Solution, Inc |
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IS25LP032D-RBLA3:P bảng dữ liệu(HTML) 98 Page - Integrated Silicon Solution, Inc |
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98 / 118 page ![]() IS25LP032D IS25WP032D Integrated Silicon Solution, Inc.- www.issi.com 98 Rev. A12 08/04/2020 AUTOBOOT REGISTER WRITE OPERATION (WRABR, 15h) Before the WRABR command can be accepted, a Write Enable (WREN) command must be issued and decoded by the device, which sets the Write Enable Latch (WEL) in the Status Register to enable any write operations. The WRABR command is entered by shifting the instruction and the data bytes, least significant byte first, most significant bit of each byte first. The WRABR data is 32 bits in length. CE# must be driven high after the 32nd bit of data has been latched. If not, the WRABR command is not executed. As soon as CE# is driven high, the WRABR operation is initiated. While the WRABR operation is in progress, Status Register may be read to check the value of the Write-In Progress (WIP) bit. The WIP bit is “1” during the WRABR operation, and is a 0 when it is completed. When the WRABR cycle is completed, the WEL is set to “0”. Figure 8.78 WRABR Sequence In SPI Mode Instruction = 15h 7 CE # SCK SI 3 2 SO 1 0 Data In 1 6 5 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Mode 3 Mode 0 4 High Impedance ... ... Figure 8.79 WRABR Sequence In QPI Mode 15h 0 1 Mode 3 Mode 0 2 3 7:4 3:0 CE# SCK IO[3:0] Data In 1 ... ... |
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