S29AL004D SPANSION, S29AL004D Datasheet - Page 33

• Manufacturer Part Number: S29AL004D
• Description: 4 Megabit (512 Kx 8-Bit/256 K x 16-Bit) CMOS 3.0 Volt-only Boot Sector Flash Memory
• Manufacturer: SPANSION

Notes:
1. DQ5 switches to 1 when an Embedded Program or Embedded Erase operation has exceeded the maximum timing
2. DQ7 and DQ2 require a valid address when reading status information. Refer to the appropriate subsection for further
February 18, 2005 S29AL004D_00_A1
Standard
Suspend
Erase
Mode
Mode
limits. See
details.
Embedded Program Algorithm
Reading within Erase
Suspended Sector
Embedded Erase Algorithm
Reading within Non-Erase
DQ5: Exceeded Timing Limits‚ on page 29
Erase-Suspend-Program
Operation
accepts additional sector erase commands. To ensure the command is accepted,
the system software should check the status of DQ3 prior to and following each
subsequent sector erase command. If DQ3 is high on the second status check,
the last command might not have been accepted.
DQ3.
Suspended Sector
A d v a n c e
Table 6. Write Operation Status
(Note 2)
DQ7#
DQ7#
I n f o r m a t i o n
DQ7
Data
0
1
S29AL004D
No toggle
Toggle
Toggle
Toggle
for more information.
DQ6
Data
(Note 1)
Table 6
DQ5
Data
0
0
0
0
shows the outputs for
DQ3
Data
N/A
N/A
N/A
1
(Note 2)
No toggle
Toggle
Toggle
DQ2
Data
N/A
RY/BY#
0
0
1
1
0
31