ADVANCE INFORMATION
Am29LV033C
32 Megabit (4 M x 8-Bit)
CMOS 3.0 Volt-only Uniform Sector Flash Memory
DISTINCTIVE CHARACTERISTICS
ARCHITECTURAL ADVANTAGES
SOFTWARE FEATURES
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Zero Power Operation
— Sophisticated power management circuits reduce
power consumed during inactive periods to nearly
zero
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Supports Common Flash Memory Interface (CFI)
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Erase Suspend/Erase Resume
— Suspends erase operations to allow programming
in same bank
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Package options
— 63-ball FBGA
— 40-pin TSOP
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Data# Polling and Toggle Bits
— Provides a software method of detecting the status
of program or erase cycles
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Compatible with JEDEC standards
— Pinout and software compatible with
single-power-supply flash standard
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Unlock Bypass Program command
— Reduces overall programming time when issuing
multiple program command sequences
HARDWARE FEATURES
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Single power supply operation
— Full voltage range: 2.7 to 3.6 volt read and write
operations for battery-powered applications
— Regulated voltage range: 3.0 to 3.6 volt read and
write operations and for compatibility with high
performance 3.3 volt microprocessors
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Any combination of sectors can be erased
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Ready/Busy# output (RY/BY#)
— Hardware method for detecting program or erase
cycle completion
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Flexible sector architecture
— Sixty-four 64 Kbyte sectors
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Hardware reset pin (RESET#)
— Hardware method of resetting the internal state
machine to the read mode
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Manufactured on 0.32 µm process technology
PERFORMANCE CHARACTERISTICS
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ACC input pin
— Acceleration (ACC) function provides accelerated
program times
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High performance
— Access times as fast as 70 ns
— Program time: 7 µs/byte typical utilizing Accelerate
function
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Sector protection
— Hardware method of locking a sector, either
in-system or using programming equipment, to
prevent any program or erase operation within that
sector
— Temporary Sector Unprotect allows changing data
in protected sectors in-system
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Ultra low power consumption (typical values)
— 2 mA active read current at 1 MHz
— 10 mA active read current at 5 MHz
— 200 nA in standby or automatic sleep mode
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Minimum 1 million write cycles guaranteed
per sector
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20-year data retention at 125°C
— Reliable operation for the life of the system
This document contains information on a product under development at Advanced Micro Devices. The information
is intended to help you evaluate this product. AMD reserves the right to change or discontinue work on this proposed
product without notice.
Publication#
22268
Rev:
A
Amendment/+9
Issue Date:
August 31, 1999
A D V A N C E
I N F O R M A T I O N
GENERAL DESCRIPTION
The Am29LV033C is a 32 Mbit, 3.0 Volt-only Flash
memory organized as 4,194,304 bytes. The device is
offered in 63-ball FBGA and 40-pin TSOP packages.
The byte-wide (x8) data appears on DQ7–DQ0. All
read, program, and erase operations are accomplished
using only a single power supply. The device can also
be programmed in standard EPROM programmers.
The standard device offers access times of 70, 90,
and 120 ns, allowing high speed microprocessors to
operate without wait states. To eliminate bus conten-
tion the device has separate chip enable (CE#), write
enable (WE#) and output enable (OE#) controls.
The device requires only a
single 3.0 volt power sup-
ply
for both read and write functions. Internally gener-
ated and regulated voltages are provided for the
program and erase operations.
The device is entirely command set compatible with
the
JEDEC single-power-supply Flash standard.
Commands are written to the command register using
standard microprocessor write timings. Register con-
tents 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.
Device programming occurs by executing the program
command sequence. This initiates the
Embedded
Program
algorithm—an internal algorithm that auto-
matically times the program pulse widths and verifies
proper cell margin. The
Unlock Bypass
mode facili-
tates faster programming times by requiring only two
write cycles to program data instead of four.
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 pro-
grammed) before executing the erase operation. Dur-
ing 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.
The
sector erase architecture
allows memory sec-
tors to be erased and reprogrammed without affecting
the data contents of other sectors. The device is fully
erased when shipped from the factory.
Hardware data protection
measures include a low
V
CC
detector that automatically inhibits write opera-
tions during power transitions. The
hardware sector
protection
feature disables both program and erase
operations in any combination of the sectors of mem-
ory. This can be achieved in-system or via program-
ming equipment.
The
Erase Suspend
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
e r a s u r e . Tr u e b a c k g r o u n d e r a s e c a n t h u s b e
achieved.
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 micropro-
cessor to read the boot-up firmware from the Flash
memory.
The device offers two power-saving features. When
addresses 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 re-
duced 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 effective-
ness. The device electrically erases all bits within a
sector simultaneously via Fowler-Nordheim tunneling.
The data is programmed using hot electron injection.
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Am29LV033C
Embedded System
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