AM29F004BB-90JF 查看數據表（PDF） - Spansion Inc.
零件编号
产品描述 (功能)
生产厂家
AM29F004BB-90JF Datasheet PDF : 37 Pages
| |||
DATA SHEET
erase commands is always less than 50 μs. See also the
Sector Erase Command Sequence on page 14 section.
After the sector erase command sequence is written, the
system should read the status on DQ7 (Data# Polling) or DQ6
(Toggle Bit I) to ensure the device accepts the command
sequence, and then read DQ3. If DQ3 is 1, the internally con-
trolled erase cycle started; all further commands (other than
Erase Suspend) are ignored until the erase operation is com-
plete. If DQ3 is 0, the device accepts additional sector erase
commands. To ensure the command was 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. Table 6 on page 19 shows the outputs
for DQ3.
START
Read DQ7–DQ0
Read DQ7–DQ0
Toggle Bit
= Toggle?
Yes
(Note
1)
No
No
DQ5 = 1?
Yes
Read DQ7–DQ0
Twice
Toggle Bit
= Toggle?
(Notes
1, 2)
No
Yes
Program/Erase
Operation Not
Complete, Write
Reset Command
Program/Erase
Operation Complete
Notes:
1. Read toggle bit twice to determine whether or not it is toggling.
See text.
2. Recheck toggle bit because it may stop toggling as DQ5
changes to 1. See text.
Figure 6. Toggle Bit Algorithm
Table 6. Write Operation Status
Standard
Mode
Erase
Suspend
Mode
Operation
Embedded Program Algorithm
Embedded Erase Algorithm
Reading within Erase
Suspended Sector
Reading within Non-Erase Suspended
Sector
Erase-Suspend-Program
DQ7
(Note 1)
DQ7#
0
1
Data
DQ7#
DQ6
Toggle
Toggle
No toggle
Data
Toggle
DQ5
(Note 2)
0
0
0
Data
0
DQ3
N/A
1
N/A
Data
N/A
DQ2
(Note 1)
No toggle
Toggle
Toggle
Data
N/A
Notes:
1. DQ7 and DQ2 require a valid address when reading status information. Refer to the appropriate subsection for further details.
2. DQ5 switches to 1 when an Embedded Program or Embedded Erase operation has exceeded the maximum timing limits. See DQ5:
Exceeded Timing Limits on page 18 for more information.
May 9, 2006 Am29F004B_00_E4
Am29F004B
19
Share Link: 