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A29002SERIES Datasheet

  • A29002SERIES

  • 256K X 8 Bit CMOS 5.0 Volt-only. Boot Sector Flash Memory

  • 31頁(yè)

  • ETC

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A29002 Series
256K X 8 Bit CMOS 5.0 Volt-only,
Preliminary
Features
n
5.0V
鹵
10% for read and write operations
n
Access times:
- 55/70/90/120/150 (max.)
n
Current:
- 20 mA typical active read current
- 30 mA typical program/erase current
- 1
碌A(chǔ)
typical CMOS standby
n
Flexible sector architecture
-
16 Kbyte/ 8 KbyteX2/ 32 Kbyte/ 64 KbyteX3 sectors
-
Any combination of sectors can be erased
-
Supports full chip erase
-
Sector protection:
A hardware method of protecting sectors to prevent
any inadvertent program or erase operations within
that sector
n
Top or bottom boot block configurations available
n
Embedded Erase Algorithms
- 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
n
Typical 100,000 program/erase cycles per sector
n
20-year data retention at 125擄C
- Reliable operation for the life of the system
n
Compatible with JEDEC-standards
- Pinout and software compatible with single-power-
supply Flash memory standard
-
Superior inadvertent write protection
n
Data
Polling and toggle bits
-
Provides a software method of detecting completion
of program or erase operations
n
Erase 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
n
Hardware reset pin (
RESET
)
-
Hardware method to reset the device to reading
array data
n
Package options
-
32-pin P-DIP, PLCC, or TSOP(Forward type)
Boot Sector Flash Memory
General Description
The A29002 is a 5.0 volt-only Flash memory organized as
262,144 bytes of 8 bits each. The 256 Kbytes of data are
further divided into seven sectors for flexible sector erase
capability. The 8 bits of data appear on I/O
0
- I/O
7
while the
addresses are input on A0 to A17. The A29002 is offered
in 32-pin PLCC, TSOP, and PDIP packages. This device is
designed to be programmed in-system with the standard
system 5.0 volt VCC supply. Additional 12.0 volt VPP is
not required for in-system write or erase operations.
However, the A29002 can also be programmed in standard
EPROM programmers.
The A29002 has a second toggle bit, I/O
2
, 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 A29002 offers access times of 55, 70,
90, 120, and 150 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 device requires only a single 5.0 volt power supply for
both read and write functions. Internally generated and
regulated voltages are provided for the program and erase
operations.
The A29002 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
algorithm - an internal algorithm that automatically
preprograms the array (if it is not already programmed)
before executing the erase operation. During erase, the
device automatically times the erase pulse widths and
verifies proper erase margin.
PRELIMINARY
(May, 2000, Version 0.0)
1
AMIC Technology, Inc.

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