ACE25AA128GFMLTH datasheet(44/71 Pages) ACE

44 / 71 page

ACE25AA128G

Serial NOR Flash Memory

128 Megabits 3.0V Quad I/O Serial Flash Memory with 4KB Uniform Sector

VER 1.1

Individual Block/Sector Lock (36H)/Unlock (39H)/Read (3DH)

The individual block/sector lock provides an alternative way to protect the memory array from adverse

Erase/Program. In order to use the Individual Block/Sector Locks, the WPS bit in Status Register-3 must

be set to 1. If WPS=0, the write protection will be determined by the combination of CMP, BP (4:0) bits in

the Status Register.

The Individual Block/Sector Lock bits are volatile bits. The default values after device power up or after a

Reset are1, so the entire memory array is being protected.

The individual Block/Sector Lock command (36H) sequence: CS# goes low SI: Sending individual

Block/Sector Lock command SI: Sending 24bits individual Block/Sector Lock Address CS# goes high.

The command sequence is shown in Figure 30.

The individual Block/Sector Unlock command (39H) sequence: CS# goes low SI: Sending individual

Block/Sector Unlock command SI: Sending 24bits individual Block/Sector Lock Address CS# goes high.

The com- mand sequence is shown in Figure 31.

Figure29. High Performance Mode Sequence Diagram

Figure29a. High Speed Mode Sequence Diagram(QPI)

ACE25AA128GFMLTH Datasheet(PDF) 44 Page - ACE Technology Co., LTD.