A29040B-90U AMICC [AMIC Technology], A29040B-90U Datasheet - Page 14

• Manufacturer Part Number: A29040B-90U
• Description: 512K X 8 Bit CMOS 5.0 Volt-only, Uniform Sector Flash Memory
• Manufacturer: AMICC [AMIC Technology]

After the sector erase command sequence is written, the
system should read the status on I/O
(Toggle Bit 1) to ensure the device has accepted the
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
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
(December, 2004, Version 0.2)
3
prior to and following each
3
7
is "0", the device will
(
Data
3
. If I/O
3
3
.
is high on the
Polling) or I/O
3
is "1", the
6
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
START
Twice
5
AMIC Technology, Corp.
= 1?
7
7
7
Yes
Yes
Yes
- I/O
-I/O
-I/O
0
0
0
A29040B Series
(Note 1)
(Notes 1,2)
No
No
Program/Erase
Commplete
Operation
5