A290011 AMICC [AMIC Technology], A290011 Datasheet - Page 12

• Manufacturer Part Number: A290011
• Description: 128K X 8 Bit CMOS 5.0 Volt-only, Boot Sector Flash Memory
• Manufacturer: AMICC [AMIC Technology]

Write Operation Status
Several bits, I/O
the A29001/A290011 to determine the status of a write
operation. Table 6 and the following subsections describe
the functions of these status bits. I/O
offer a method for determining whether a program or erase
operation is complete or in progress. These three bits are
discussed first.
I/O
The
whether an Embedded Algorithm is in progress or
completed, or whether the device is in Erase Suspend.
pulse in the program or erase command sequence.
During the Embedded Program algorithm, the device
outputs on I/O
to I/O
Erase Suspend. When the Embedded Program algorithm
is complete, the device outputs the datum programmed to
I/O
read valid status information on I/O
falls within a protected sector,
active for approximately 2 s, then the device returns to
reading array data.
During the Embedded Erase algorithm,
produces a "0" on I/O
algorithm is complete, or if the device enters the Erase
Suspend mode,
is analogous to the complement/true datum output
described for the Embedded Program algorithm: the erase
function changes all the bits in a sector to "1"; prior to this,
the device outputs the "complement," or "0." The system
must provide an address within any of the sectors selected
for erasure to read valid status information on I/O
After an erase command sequence is written, if all sectors
selected for erasing are protected,
active for approximately 100 s, then the device returns to
reading array data. If not all selected sectors are protected,
the Embedded Erase algorithm erases the unprotected
sectors, and ignores the selected sectors that are
protected.
When the system detects I/O
complement to true data, it can read valid data at I/O
on the following read cycles. This is because I/O
change asynchronously with I/O
(
Embedded Algorithms) figure in the "AC Characteristics"
section illustrates this. Table 6 shows the outputs for
Polling on I/O
PRELIMINARY
Data
OE
7
7
. The system must provide the program address to
: Data Polling
Data
) is asserted low. The
7
Polling is valid after the rising edge of the final
. This I/O
Polling bit, I/O
7
7
. Figure 4 shows the
7
the complement of the datum programmed
2
Data
status also applies to programming during
, I/O
(August, 2001, Version 0.3)
3
, I/O
Polling produces a "1" on I/O
7
. When the Embedded Erase
7
5
, indicates to the host system
, I/O
Data
0
6
7
, and I/O
- I/O
Data
has changed from the
Polling Timings (During
Data
7
Data
. If a program address
6
7
, I/O
while Output Enable
Polling on I/O
Polling algorithm.
7,
Polling on I/O
6
are provided in
and I/O
Data
7
.
Polling
2
7
7
7
Data
- I/O
each
.This
WE
may
7
7
is
is
0
12
Note :
1. VA = Valid address for programming. During a sector
2. I/O
erase operation, a valid address is an address within any
sector selected for erasure. During chip erase, a valid
address is any non-protected sector address.
I/O
No
7
7
should be rechecked even if I/O
may change simultaneously with I/O
Figure 4. Data Polling Algorithm
A29001/A290011 Series
Read I/O
Read I/O
Address = VA
Address = VA
I/O
I/O
I/O
START
7
7
FAIL
= Data ?
= Data ?
5
AMIC Technology, Inc.
= 1?
7
7
-I/O
- I/O
Yes
No
No
0
0
5
= "1" because
Yes
Yes
5
.
PASS