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following each subsequent sector erase command to ensure command

completion. The device may not have accepted the command if DQ3 is

high on second status check.

Write program command sequence

(see below)

DATA poll device

Verify byte?

Programming completed

5555h/AAh

2AAAh/55h

5555h/A0h

Program address/program data

Program command sequence

×16 mode (address/command):

NO

YES

5555h/AAh

2AAAh/55h

5555h/80h

Chip erase command sequence

5555h/AAh

2AAAh/55h

5555h/10h

Sector erase command sequence

Erase complete

Sector address/30h

Sector address/30h

Sector address/30h

Optional multiple

×16 mode (address/command):

×16 mode (address/command):

5555h/AAh

2AAAh/55h

5555h/80h

5555h/AAh

2AAAh/55h

DATA polling or toggle bit

successfully completed

Write erase command sequence

(see below)