MX29LV640D MCNIX [Macronix International], MX29LV640D Datasheet - Page 24

• Manufacturer Part Number: MX29LV640D
• Description: 64M-BIT [8M x 8/4M x 16] SINGLE VOLTAGE 3V
• Manufacturer: MCNIX [Macronix International]

2. RY/BY# is open drain output pin and should be weakly connected to VDD through a pull-up resistor.
3. When an attempt is made to erase a protected sector, Q7 will output its complement data or Q6 continues to toggle
4. Q2 is a localized indicator showing a specified sector is undergoing erase operation or not. Q2 toggles when user
SECTOR ERASE SUSPEND
During sector erasure, sector erase suspend is the only valid command. If user issue erase suspend command in the
time-out period of sector erasure, device time-out period will be over immediately and the device will go back to erase-
suspended read array mode. If user issue erase suspend command during the sector erase is being operated, device
will suspend the ongoing erase operation, and after the Tready1 (<=20us) suspend finishes and the device will enter
erase-suspended read array mode. User can judge if the device has finished erase suspend through Q6, Q7, and RY/
BY#.
After device has entered erase-suspended read array mode, user can read other sectors not at erase suspend by the
speed of Taa; while reading the sector in erase-suspend mode, device will output its status. Whenever a suspend
command is issued, user must issue a resume 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:
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
Sector erase resume command is valid only when the device is in erase suspend state. After erase resume, user can
issue another erase suspend command, but there should be a 4ms interval between erase resume and the next erase
suspend. If user issue infinite suspend-resume loop, or suspend-resume exceeds 1024 times, the time for erasing will
increase.
P/N:PM1208
for 100us or less and the device returned to read array status without erasing the data in the protected sector.
reads at addresses where the sectors are actively being erased (in erase mode) or to be erased (in erase suspend
mode). When a sector has been completely erased, Q2 stops toggling at the sector even when the device is still in
erase operation for remaining selected sectors. At that circumstance, Q2 will still toggle when device is read at any
other sector that remains to be erased.
Status
Erase suspend read in erase suspended sector
Erase suspend read in non-erase suspended sector
Erase suspend program in non-erase suspended sector
24
MX29LV640D T/B
Data
Q7#
Q7
1
No toggle
Toggle
Data
Q6
Data
Q5
0
0
Data
N/A
N/A
Q3
toggle
REV. 1.6, AUG. 16, 2008
Data
N/A
Q2
RY/BY#
1
1
0