GD25Q32C datasheet(28/50 Pages) ELM

28 / 50 page

Rev.1.0

50 -

http://www.elm-tech.com

GD25Q32CxIGx 3.3V Uniform Sector Dual and Quad Serial Flash

7.18. 32KB Block Erase (BE) (52H)

The 32KB Block Erase (BE) command is used to erase all the data of the chosen block. A Write Enable (WREN)

command must previously have been executed to set the Write Enable Latch (WEL) bit. The 32KB Block Erase

(BE) command is entered by driving CS# low, followed by the command code, and three address bytes on SI.

Any address inside the block is a valid address for the 32KB Block Erase (BE) command. CS# must be driven

low for the entire duration of the sequence.

The 32KB Block Erase command sequence: CS# goes low → sending 32KB Block Erase command → 3-byte

address on SI→ CS# goes high. The command sequence is shown in Figure22. CS# must be driven high after

the eighth bit of the last address byte has been latched in; otherwise the 32KB Block Erase (BE) command is not

executed. As soon as CS# is driven high, the self-timed Block Erase cycle (whose duration is tBE) is initiated.

While the Block 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 Block 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. A 32KB Block Erase (BE) command applied to a block which is protected by the Block Protect (BP4,

BP3, BP2, BP1 and BP0) bits (see Table1. & Table1.1.) is not executed.

Figure 22. 32KB Block Erase Sequence Diagram

Command

0 1 2 3 4 5 6 7

52H

CS#

SCLK

8 9

29 30 31

MSB

2 1 0

24 Bits Address

23 22

7.19. 64KB Block Erase (BE) (D8H)

The 64KB Block Erase (BE) command is used to erase all the data of the chosen block. A Write Enable (WREN)

command must previously have been executed to set the Write Enable Latch (WEL) bit. The 64KB Block Erase

(BE) command is entered by driving CS# low, followed by the command code, and three address bytes on SI.

Any address inside the block is a valid address for the 64KB Block Erase (BE) command. CS# must be driven

low for the entire duration of the sequence.

The 64KB Block Erase command sequence: CS# goes low → sending 64KB Block Erase command → 3-byte

address on SI → CS# goes high. The command sequence is shown in Figure23. CS# must be driven high after

the eighth bit of the last address byte has been latched in; otherwise the 64KB Block Erase (BE) command is not

executed. As soon as CS# is driven high, the self-timed Block Erase cycle (whose duration is tBE) is initiated.

While the Block 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 Block 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. A 64KB Block Erase (BE) command applied to a block which is protected by the Block Protect (BP4,

BP3, BP2, BP1 and BP0) bits (see Table1. & Table1.1.) is not executed.

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