A29L040 Series
512K X 8 Bit CMOS 3.0 Volt-only,
Uniform Sector Flash Memory
Preliminary
Features
nSingle 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 for compatibility with high
performance 3.3 volt microprocessors
nAccess times:
- Embedded Erase algorithm will automatically erase
the entire chip or any combination of designated
sectors and verify the erased sectors
- Embedded Program algorithm automatically writes
and verifies bytes at specified addresses
nTypical 100,000 program/erase cycles per sector
n20-year data retention at 125°C
- Reliable operation for the life of the system
nCompatible with JEDEC-standards
- 70 (max.)
nCurrent:
- 4 mA typical active read current
- 20 mA typical program/erase current
- 200 nA typical CMOS standby
- Pinout and software compatible with single-power-
supply Flash memory standard
- Superior inadvertent write protection
- 200 nA Automatic Sleep Mode current
nFlexible sector architecture
n
Polling and toggle bits
- Provides a software method of detecting completion
of program or erase operations
Data
- 8 uniform sectors of 64 Kbyte each
- Any combination of sectors can be erased
- Supports full chip erase
nErase Suspend/Erase Resume
- Suspends a sector erase operation to read data
from, or program data to, a non-erasing sector, then
resumes the erase operation
- Sector protection:
A hardware method of protecting sectors to prevent
any inadvertent program or erase operations within
that sector
nPackage options
- 32-pin DIP, PLCC, TSOP (8mm x 20mm) or sTSOP
(8mm x 14mm)
nEmbedded Erase Algorithms
General Description
The A29L040 is a 3.0 volt-only Flash memory organized as
524,288 bytes of 8 bits each. The 512 Kbytes of data are
further divided into eight sectors of 64 Kbytes each for
flexible sector erase capability. The 8 bits of data appear on
I/O0 - I/O7 while the addresses are input on A0 to A18. The
A29L040 is offered in 32-pin PLCC, TSOP (8mm x 20mm)
or sTSOP (8mm x 14mm) packages. This device is
designed to be programmed in-system with the standard
system 3.0 volt VCC supply. Additional 12.0 volt VPP is not
required for in-system write or erase operations. However,
the A29L040 can also be programmed in standard EPROM
programmers.
The A29L040 has a second toggle bit, I/O2, to indicate
whether the addressed sector is being selected for erase,
and also offers the ability to program in the Erase Suspend
mode. The standard A29L040 offers access times of 70ns,
allowing high-speed microprocessors to operate without
wait states. To eliminate bus contention the device has
The 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 A29L040 is entirely software command set compatible
with the JEDEC single-power-supply Flash standard.
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.
Device programming occurs by writing the proper program
command sequence. This initiates the Embedded Program
algorithm - an internal algorithm that automatically times the
program pulse widths and verifies proper program margin.
Device erasure occurs by executing the proper erase
command sequence. This initiates the Embedded Erase
separate chip enable (
), write enable (
) and output
WE
CE
enable (
) controls.
OE
algorithm
-
an internal algorithm that automatically
preprograms the array (if it is not already programmed)
PRELIMINARY
(June, 2003, Version 0.1)
1
AMIC Technology, Corp.
AMICC [ AMIC TECHNOLOGY ]
