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參數(shù)資料
| 型號： | Am29F004B-B-70JE |
| 廠商： | Advanced Micro Devices, Inc. |
| 英文描述： | 4 Megabit (512 K x 8-Bit) CMOS 5.0 Volt-only Boot Sector Flash Memory |
| 中文描述： | 4兆位（512畝× 8位）的CMOS 5.0伏，只引導(dǎo)扇區(qū)閃存 |
| 文件頁數(shù)： | 21/37頁 |
| 文件大?。?/td> | 993K |
| 代理商： | AM29F004B-B-70JE |
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8/5/05
Am29F004B
19
A D V A N C E I N F O R M A T I O N
erase commands is always less than 50
μ
s. 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.
Table 6. Write Operation Status
Notes:
1.
2.
DQ7 and DQ2 require a valid address when reading status information. Refer to the appropriate subsection for further details.
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.
START
No
Yes
Yes
DQ5 = 1
No
Yes
Toggle Bit
= Toggle
No
Program/Erase
Operation Not
Complete, Write
Reset Command
Program/Erase
Operation Complete
Read DQ7–DQ0
Toggle Bit
= Toggle
Read DQ7–DQ0
Twice
Read DQ7–DQ0
Notes:
1.
Read toggle bit twice to determine whether or not it is toggling.
See text.
Recheck toggle bit because it may stop toggling as DQ5
changes to
1
. See text.
2.
Figure 6. Toggle Bit Algorithm
(Notes
1, 2)
(Note
1)
Operation
DQ7
(Note 1)
DQ7#
0
DQ6
Toggle
Toggle
DQ5
(Note 2)
0
0
DQ3
N/A
1
DQ2
(Note 1)
No toggle
Toggle
Standard
Mode
Embedded Program Algorithm
Embedded Erase Algorithm
Reading within Erase
Suspended Sector
Reading within Non-Erase Suspended
Sector
Erase-Suspend-Program
Erase
Suspend
Mode
1
No toggle
0
N/A
Toggle
Data
Data
Data
Data
Data
DQ7#
Toggle
0
N/A
N/A
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| Am29F004B-B-70JF | 4 Megabit (512 K x 8-Bit) CMOS 5.0 Volt-only Boot Sector Flash Memory |
| Am29F004B-B-70JI | 4 Megabit (512 K x 8-Bit) CMOS 5.0 Volt-only Boot Sector Flash Memory |
| Am29F004B-T-70JE | 4 Megabit (512 K x 8-Bit) CMOS 5.0 Volt-only Boot Sector Flash Memory |
| Am29F004B-T-70JF | 4 Megabit (512 K x 8-Bit) CMOS 5.0 Volt-only Boot Sector Flash Memory |
| Am29F004B-B-70JK | 4 Megabit (512 K x 8-Bit) CMOS 5.0 Volt-only Boot Sector Flash Memory |
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| AM29F010 | 制造商:Panasonic Industrial Company 功能描述:IC |
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