MX29GL640ET-B Datasheet, PDF (32/82 Pages) Macronix International – SINGLE VOLTAGE 3V ONLY FLASH MEMORY

MX29GL640E T/B
MX29GL640E H/L
COMMAND OPERATIONS (cont'd)
ERASE SUSPEND/RESUME
After beginning a sector erase operation, Erase Suspend is the only valid command that may be issued. If sys-
tem issues an Erase Suspend command during the 50us time-out period following a Sector Erase command, the
time-out period will terminate immediately and the device will enter Erase-Suspended Read mode. If the system
issues an Erase Suspend command after the sector erase operation has already begun, the device will not enter
Erase-Suspended Read mode until 20us time has elapsed. The system can determine if the device has entered
the Erase-Suspended Read mode through Q6, Q7, and RY/BY#.
After the device has entered Erase-Suspended Read mode, the system can read or program any sector(s) ex-
cept those being erased by the suspended erase operation. Reading any sector being erased or programmed
will return the contents of the status register. Whenever a suspend command is issued, user must issue a re-
sume command and check Q6 toggle bit status, before issue another erase command. The system can use the
status register bits shown in the following table to determine the current state of the device:
Status
Q7
Q6
Q5
Erase suspend read in erase suspended sector
1 No toggle 0
Erase suspend read in non-erase suspended sector _{Data Data Data}
Erase suspend program in non-erase suspended sector _{Q7# Toggle 0}
Q3
N/A
Data
N/A
Q2 Q1 RY/BY#
toggle N/A 1
Data Data 1
N/A N/A 0
When the device has suspended erasing, user can execute the command sets except sector erase and chip
erase, such as read silicon ID, sector protect verify, program, CFI query and erase resume.
SECTOR ERASE RESUME
The sector Erase Resume command is valid only when the device is in Erase-Suspended Read mode. After
erase resumes, the user can issue another Ease Suspend command, but there should be a 400us interval be-
tween Ease Resume and the next Erase Suspend command.
P/N:PM1494
REV. 1.6, OCT. 30, 2013
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