A29L040-70 AMICC [AMIC Technology], A29L040-70 Datasheet - Page 6

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

Requirements for Reading Array Data
To read array data from the outputs, the system must drive
the
selects the device.
array data to the output pins.
the time during read operation. The internal state machine
is set for reading array data upon device power-up, or after
a hardware reset. This ensures that no spurious alteration
of the memory content occurs during the power transition.
No command is necessary in this mode to obtain array
data. Standard microprocessor read cycles that assert valid
addresses on the device address inputs produce valid data
on the device data outputs. The device remains enabled for
read access until the command register contents are
altered.
See "Reading Array Data" for more information. Refer to the
AC Read Operations table for timing specifications and to
the Read Operations Timings diagram for the timing
waveforms, l
the active current specification for reading array data.
Writing Commands/Command Sequences
To write a command or command sequence (which
includes programming data to the device and erasing
sectors of memory), the system must drive
V
sector, multiple sectors, or the entire device. The Sector
Address Tables indicate the address range that each sector
occupies. A "sector address" consists of the address inputs
required to uniquely select a sector. See the "Command
Definitions" section for details on erasing a sector or the
entire chip, or suspending/resuming the erase operation.
After the system writes the autoselect command sequence,
the device enters the autoselect mode. The system can
then read autoselect codes from the internal register (which
is separate from the memory array) on I/O
read cycle timings apply in this mode. Refer to the
Note: All sectors are 64 Kbytes in size.
PRELIMINARY
IL
, and
CE
Sector
and
SA0
SA1
SA2
SA3
SA4
SA5
SA6
SA7
OE
OE
CC1
to V
in the DC Characteristics table represents
pins to V
(June, 2003, Version 0.1)
IH
. An erase operation can erase one
OE
is the output control and gates
IL
.
CE
A18
WE
0
0
0
0
1
1
1
1
is the power control and
should remain at V
7
Table 2. Sector Addresses Table
WE
- I/O
0
and
. Standard
A17
0
0
0
0
1
1
1
1
CE
IH
all
to
5
"Autoselect Mode" and "Autoselect Command Sequence"
sections for more information.
I
current specification for the write mode. The "AC
Characteristics" section contains timing specification tables
and timing diagrams for write operations.
Program and Erase Operation Status
During an erase or program operation, the system may
check the status of the operation by reading the status bits
on I/O
specifications apply. Refer to "Write Operation Status" for
more information, and to each AC Characteristics section
for timing diagrams.
Standby Mode
When the system is not reading or writing to the device, it
can place the device in the standby mode. In this mode,
current consumption is greatly reduced, and the outputs are
placed in the high impedance state, independent of the
input.
The device enters the CMOS standby mode when the
pin is held at V
voltage range than V
mode when
standard access time (t
If the device is deselected during erasure or programming,
the device draws active current until the operation is
completed.
I
current specification.
Output Disable Mode
When the
disabled. The output pins are placed in the high impedance
state.
CC2
CC3
in the DC Characteristics tables represents the standby
in the Characteristics table represents the active
A16
7
0
0
0
0
1
1
1
1
- I/O
OE
0
CE
. Standard read cycle timings and I
CC
input is at V
is held at V
0.3V. (Note that this is a more restricted
IH
.) The device enters the TTL standby
CE
AMIC Technology, Corp.
) before it is ready to read data.
Address Range
00000h - 0FFFFh
20000h - 2FFFFh
30000h - 3FFFFh
40000h - 4FFFFh
50000h - 5FFFFh
60000h - 6FFFFh
70000h - 7FFFFh
10000h - 1FFFFh
IH
IH
, output from the device is
A29L040 Series
. The device requires the
CC
read
OE
CE