AM29F160DB-70EF Spansion Inc., AM29F160DB-70EF Datasheet - Page 23

• Manufacturer Part Number: AM29F160DB-70EF
• Description: IC, FLASH, 16MBIT, 70NS, TSOP-48
• Manufacturer: Spansion Inc.

Specifications of AM29F160DB-70EF

• Memory Type: Flash
• Memory Size: 16Mbit
• Memory Configuration: 2M X 8 / 1M X 16
• Ic Interface Type: Parallel
• Access Time: 70ns
• Supply Voltage Range: 4.5V To 5.5V
• Memory Case Style: TSOP
• No. Of Pins: 48
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

The Sector Erase command sequence should be rein-
itiated once the device returns to reading array data, to
ensure data integrity.
When the Embedded Erase algorithm is complete, the
device returns to reading array data and addresses are
no longer latched. The system can determine the sta-
tus of the erase operation by using DQ7, DQ6, DQ2, or
RY/BY#. Refer to
for information on these status bits.
Figure 4, on page 21
erase operation. Refer to the Erase/Program Opera-
tions tables in the
parameters, and to the Sector Erase Operations Tim-
ing diagram for timing waveforms.
Erase Suspend/Erase Resume Commands
The Erase Suspend command allows the system to in-
terrupt a sector erase operation and then read data
from, or program data to, any sector not selected for
erasure. This command is valid only during the sector
erase operation, including the 50 µs time-out period
during the sector erase command sequence. The
Erase Suspend command is ignored if written during
the chip erase operation or Embedded Program algo-
rithm. Writing the Erase Suspend command during the
Sector Erase time-out immediately terminates the
time-out period and suspends the erase operation. Ad-
dresses are “don’t-cares” when writing the Erase Sus-
pend command.
When the Erase Suspend command is written during a
sector erase operation, the device requires a maximum
of 20 µs to suspend the erase operation. However,
when the Erase Suspend command is written during
the sector erase time-out, the device immediately ter-
minates the time-out period and suspends the erase
operation.
After the erase operation is suspended, the system can
read array data from or program data to any sector not
selected for erasure. (The device “erase suspends” all
sectors selected for erasure.) Normal read and write
timings and command definitions apply. Reading at any
address within erase-suspended sectors produces sta-
tus data on DQ7–DQ0. The system can use DQ7, or
DQ6 and DQ2 together, to determine if a sector is ac-
tively erasing or is erase-suspended. See
ation Status‚ on page 23
bits.
After an erase-suspended program operation is com-
plete, the system can once again read array data within
non-suspended sectors. The system can determine
April 23, 2010 Am29F160D_00_D10
Write Operation Status‚ on page 23
AC Characteristics‚ on page 31
illustrates the algorithm for the
for information on these status
Write Oper-
D A T A S H E E T
Am29F160D
for
the status of the program operation using the DQ7 or
DQ6 status bits, just as in the standard program oper-
ation. See
more information.
The system may also write the autoselect command
sequence when the device is in the Erase Suspend
mode. The device allows reading autoselect codes
even at addresses within erasing sectors, since the
codes are not stored in the memory array. When the
device exits the autoselect mode, the device reverts to
the Erase Suspend mode, and is ready for another
valid operation. See
on page 19
The system must write the Erase Resume command
(address bits are “don’t care”) to exit the erase suspend
mode and continue the sector erase operation. Further
writes of the Resume command are ignored. Another
Erase Suspend command can be written after the de-
vice resumes erasing.
1. See the appropriate Command Definitions table for erase
2. See
command sequence.
mation.
DQ3: Sector Erase Timer‚ on page 25
No
for more information.
Write Operation Status‚ on page 23
Figure 4. Erase Operation
Command Sequence
Erasure Completed
Write Erase
from System
Data = FFh?
Data Poll
START
Autoselect Command Sequence‚
Yes
Embedded
Erase
algorithm
in progress
for more infor-
21
for