ACE25C512G

Uniform Sector Dual and Quad Serial Flash

VER 1.5

21

Figure17. 64KB Block Erase Sequence Diagram

Chip Erase (CE) (60/C7H)

The Chip Erase (CE) command is for erasing the all data of the chip. A Write Enable (WREN)

command must previously have been executed to set the Write Enable Latch (WEL) bit .The Chip

Erase (CE) command is entered by driving CS# Low, followed by the command code on Serial Data

Input (SI). CS# must be driven Low for the entire duration of the sequence.

The Chip Erase command sequence: CS# goes low sending Chip Erase command CS# goes high.

The command sequence is shown in Figure18. CS# must be driven high after the eighth bit of the

command code has been latched in, otherwise the Chip Erase command is not executed. As soon as

CS# is driven high, the self-timed Chip Erase cycle (whose duration is tCE) is initiated. While the

Chip Erase cycle is in progress, the Status Register may be read to check the value of the Write In

Progress (WIP) bit. The Write In Progress (WIP) bit is 1 during the self-timed Chip Erase cycle, and is

0 when it is completed. At some unspecified time before the cycle is completed, the Write Enable

Latch (WEL) bit is reset. The Chip Erase (CE) command is executed only if the Block Protect (BP2,

BP1, BP0) bits are “000” when CMP=0, or “110/111” when CMP=1. The Chip Erase (CE) command is

ignored if one or more sectors are protected.

Figure18. Chip Erase Sequence Diagram