P r e l i m i n a r y I n f o r m a t i o n
ther commands (except Erase Suspend) are ignored
mand. If DQ3 is high on the second status check, the
last command might not have been accepted.
until the erase operation is complete. If DQ3 is “0,” the
device will accept additional sector erase commands.
To ensure the command has been accepted, the sys-
tem software should check the status of DQ3 prior to
and following each subsequent sector erase com-
Table 23 shows the status of DQ3 relative to the other
status bits.
Table 23. Write Operation Status
DQ5
(Note
1)
DQ7
DQ2
(Note 2)
RDY
(Note 5)
Status
(Note 2)
DQ7#
0
DQ6
DQ3
N/A
1
Embedded Program Algorithm
Embedded Erase Algorithm
Toggle
Toggle
0
0
No toggle
Toggle
0
0
Standard
Mode
High
Impedanc
e
Erase
Suspended Sector
1
No toggle
0
N/A
Toggle
Erase-Suspend-
Read (Note 4)
Erase
Suspend
Mode
High
Impedanc
e
Non-Erase
Suspended Sector
Data
Data
Data
0
Data
N/A
Data
N/A
Erase-Suspend-Program
DQ7#
Toggle
0
Notes:
1. DQ5 switches to ‘1’ when an Embedded Program or Embedded Erase operation has exceeded the maximum timing limits.
Refer to the section on DQ5 for more information.
2. DQ7 and DQ2 require a valid address when reading status information. Refer to the appropriate subsection for
further details.
3. When reading write operation status bits, the system must always provide the bank address where the Embedded
Algorithm is in progress. The device outputs array data if the system addresses a non-busy bank.
4. The system may read either asynchronously or synchronously (burst) while in erase suspend.
5. The RDY pin acts a dedicated output to indicate the status of an embedded erase or program operation is in
progress. This is available in the Asynchronous mode only.
Absolute Maximum Ratings
Storage Temperature
Plastic Packages –65°C to +150°C
V
V
(Note 1)
–0.5 V to +2.5 V
–0.5 V to +2.5 V
CC
IO
Ambient Temperature
with Power Applied–65°C to +125°C
A9, RESET#, ACC (Note 1)–0.5 V to +12.5 V
Output Short Circuit Current (Note 3)100
mA
Voltage with Respect to Ground:
All Inputs and I/Os except
as noted below (Note 1)–0.5 V to V + 0.5 V
IO
1. Minimum DC voltage on input or I/Os is –0.5 V. During voltage transitions, inputs or I/Os may undershoot VSS to –
2.0 V for periods of up to 20 ns. See Figure 10. Maximum DC voltage on input or I/Os is VCC + 0.5 V. During voltage
transitions outputs may overshoot to VCC + 2.0 V for periods up to 20 ns. See Figure 11.
2. No more than one output may be shorted to ground at a time. Duration of the short circuit should not be greater
than one second.
3. Stresses above those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. This is
a stress rating only; functional operation of the device at these or any other conditions above those indicated in the
operational sections of this data sheet is not implied. Exposure of the device to absolute maximum rating conditions
for extended periods may affect device reliability.
June 18, 2004 27024_A5_00_E
Am29BDS128H/Am29BDS064H
51
SPANSION [ SPANSION ]
