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IS25LE01G-RILA3 bảng dữ liệu(PDF) 160 Page - Integrated Silicon Solution, Inc |
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IS25LE01G-RILA3 bảng dữ liệu(HTML) 160 Page - Integrated Silicon Solution, Inc |
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160 / 186 page ![]() IS25LE01G IS25WE01G Integrated Silicon Solution, Inc.- www.issi.com 160 Rev. A6 01/14/2025 8.59 SET FREEZE BIT OPERATION (SFRZ, 91h) The Set FREEZE Bit (SFRZ) command sets FREEZE (PPB Lock Register bit7) to one. Please refer to the section 6.6.3 PPB Lock Register for more detail. Before the SFRZ command can be accepted by the device, 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 SFRZ command is entered by driving CE# low, followed by the instruction code. CE# must be driven high after the eighth bit of instruction has been latched in. If not, the SFRZ command is not executed. As soon as CE# is driven high, the SFRZ operation is initiated. While the SFRZ operation is in progress, the Status Register may still be read to check the value of the Write In Progress (WIP) bit. The WIP bit is “1” during the SFRZ operation, and is “0” when it is completed. When the SFRZ operation is completed, the WEL is set to “0”. Figure 8.130 Set FREEZE Bit Sequence In SPI Mode Instruction = 91h CE# SCK SI 0 1 2 3 4 5 6 7 Mode 3 Mode 0 SO High Impedance Figure 8.131 Set FREEZE Bit Sequence In QPI Mode 91h CE# SCK IO[3:0] 0 1 Mode 3 Mode 0 |
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