A29L040-70 AMICC [AMIC Technology], A29L040-70 Datasheet - Page 14

• Manufacturer Part Number: A29L040-70
• Description: 512K X 8 Bit CMOS 3.0 Volt-only, Uniform Sector Flash Memory
• Manufacturer: AMICC [AMIC Technology]

I/O
After writing a sector erase command sequence, the
system may read I/O
erase operation has begun. (The sector erase timer does
not apply to the chip erase command.) If additional
sectors are selected for erasure, the entire time-out also
applies after each additional sector erase command.
When the time-out is complete, I/O
"1." The system may ignore I/O
guarantee that the time between additional sector erase
commands will always be less than 50 s. See also the
"Sector Erase Command Sequence" section.
After the sector erase command sequence is written, the
system should read the status on I/O
I/O
command sequence, and then read I/O
internally controlled erase cycle has begun; all further
commands (other than Erase Suspend) are ignored until
the erase operation is complete. If I/O
will accept additional sector erase commands. To ensure
the command has been accepted, the system software
should check the status of I/O
subsequent sector erase command. If I/O
second status check, the last command might not have
been accepted. Table 5 shows the outputs for I/O
PRELIMINARY
6
3
: Sector Erase Timer
(Toggle Bit 1) to ensure the device has accepted the
(June, 2003, Version 0.1)
3
to determine whether or not an
3
prior to and following each
3
3
switches from "0" to
if the system can
7
3
3
. If I/O
(
is "0", the device
Data
3
is high on the
3
Polling) or
is "1", the
3
.
13
Notes :
1. Read toggle bit twice to determine whether or not it is
2. Recheck toggle bit because it may stop toggling as I/O
toggling. See text.
changes to "1". See text.
No
Figure 4. Toggle Bit Algorithm
Commplete, Write
Reset Command
Read I/O
Program/Erase
Read I/O
Read I/O
Operation Not
= Toggle ?
= Toggle ?
Toggle Bit
Toggle Bit
I/O
AMIC Technology, Corp.
START
Twice
5
= 1?
7
7
7
Yes
Yes
Yes
-I/O
-I/O
- I/O
A29L040 Series
0
0
0
(Note 1)
(Notes 1,2)
No
No
Program/Erase
Commplete
Operation
5