D A T A S H E E T
GENERAL DESCRIPTION
The Am29BL802C is an 8 Mbit, 3.0 Volt-only burst
mode Flash memory devices organized as 524, 288
words. The device is offered in a 56-pin SSOP
package. These devices are designed to be pro-
grammed in-system with the standard system 3.0-volt
before executing the erase operation. During erase, the
device automatically times the erase pulse widths and
verifies proper cell margin.
The host system can detect whether a program or
erase operation is complete by observing the RY/BY#
pin, or by reading the DQ7 (Data# Polling) and DQ6
(toggle) status bits. After a program or erase cycle has
been completed, the device is ready to read array data
or accept another command.
V
supply. A 12.0-volt V or 5.0 V is not required
CC
PP CC
for program or erase operations. The device can also
be programmed in standard EPROM programmers.
The device offers access times of 65, 70, 90, and 120
ns, allowing high speed microprocessors to operate
without wait states. To eliminate bus contention the
device has separate chip enable (CE#), write enable
(WE#) and output enable (OE#) controls.
The sector erase architecture allows memory sectors
to be erased and reprogrammed without affecting the
data contents of other sectors. The device is fully
erased when shipped from the factory.
Burst Mode Features
Hardware data protection measures include a low V
CC
The Am29BL802C offers a Linear Burst mode—a
32 word sequential burst with wrap around—in a
bottom boot configuration only. This devices require
additional control pins for burst operations: Load
Burst Address (LBA#), Burst Address Advance
(BAA#), and Clock (CLK). This implementation allows
easy interface with minimal glue logic to a wide range
of microprocessors/microcontrollers for high perfor-
mance read operations.
detector that automatically inhibits write operations dur-
ing power transitions. The hardware sector protection
feature disables both program and erase operations in
any combination of the sectors of memory. This can be
achieved in-system or via programming equipment.
The Erase Suspend/Erase Resume feature enables
the user to put erase on hold for any period of time to
read data from, or program data to, any sector that is
not selected for erasure. True background erase can
thus be achieved.
AMD Flash Memory Features
Each device requires only a single 3.0 volt power
supply for both read and write functions. Internally
generated and regulated voltages are provided for the
program and erase operations. The I/O and control
signals are 5V tolerant.
The hardware RESET# pin terminates any operation
in progress and resets the internal state machine to
reading array data. The RESET# pin may be tied to the
system reset circuitry. A system reset would thus also
reset the device, enabling the system microprocessor
to read the boot-up firmware from the Flash memory.
The Am29BL802C is entirely command set compatible
with the JEDEC single-power-supply Flash stan-
dard. Commands are written to the command register
using standard microprocessor write timings. Register
contents serve as input to an internal state-machine
that controls the erase and programming circuitry.
Write cycles also internally latch addresses and data
needed for the programming and erase operations.
Reading data out of the device is similar to reading
from other Flash or EPROM devices.
The device offers two power-saving features. When ad-
dresses have been stable for a specified amount of
time, the device enters the automatic sleep mode.
The system can also place the device into the standby
mode. Power consumption is greatly reduced in both
these modes.
AMD’s Flash technology combines years of Flash
memory manufacturing experience to produce the
highest levels of quality, reliability and cost effectiveness.
The device electrically erases all bits within a sector
simultaneously via Fowler-Nordheim tunneling. The
data is programmed using hot electron injection.
Device erasure occurs by executing the erase com-
mand sequence. This initiates the Embedded Erase
algorithm—an internal algorithm that automatically
preprograms the array (if it is not already programmed)
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Am29BL802C
22371C7 November 3, 2006
SPANSION [ SPANSION ]
