AM29BDS128HD8VFI AMD [Advanced Micro Devices], AM29BDS128HD8VFI Datasheet - Page 54

• Manufacturer Part Number: AM29BDS128HD8VFI
• Description: 128 or 64 Megabit (8 M or 4 M x 16-Bit) CMOS 1.8 Volt-only Simultaneous Read/Write, Burst Mode Flash Memory
• Manufacturer: AMD [Advanced Micro Devices]

device will accept additional sector erase commands.
To ensure the command has been accepted, the
system software should check the status of DQ3 prior
to and following each subsequent sector erase com-
Notes:
1. DQ5 switches to ‘1’ when an Embedded Program or Embedded Erase operation has exceeded the maximum timing limits.
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
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
52
Standard
Suspend
Refer to the section on DQ5 for more information.
is in progress. The device outputs array data if the system addresses a non-busy bank.
is available in the Asynchronous mode only.
Erase
Mode
Mode
Embedded Program Algorithm
Embedded Erase Algorithm
Erase-Suspend-Program
Erase-Suspend-
Read (Note 4)
Status
Erase
Suspended Sector
Non-Erase
Suspended Sector
Table 23. Write Operation Status
Am29BDS128H/Am29BDS640H
D A T A
(Note 2)
DQ7#
DQ7#
Data
DQ7
0
1
S H E E T
mand. If DQ3 is high on the second status check, the
last command might not have been accepted.
Table 23
status bits.
No toggle
Toggle
Toggle
Toggle
Data
DQ6
shows the status of DQ3 relative to the other
(Note 1)
Data
DQ5
0
0
0
0
DQ3
Data
N/A
N/A
N/A
1
No toggle
(Note 2)
Toggle
Toggle
27024B3 May 10, 2006
Data
DQ2
N/A
RDY (Note
Impedance
Impedance
High
High
5)
0
0
0