A29L160A Series
2M X 8 Bit / 1M X 16 Bit CMOS 3.3 Volt-only,
Boot Sector Flash Memory
Features
ꢀSingle power supply operation
-
Embedded Program algorithm automatically writes and
verifies data at specified addresses
- Regulated voltage range: 3.0 to 3.6 volt read and write
operations for compatibility with high performance 3.3 ꢀTypical 100,000 program/erase cycles per sector
volt microprocessors
ꢀAccess times:
- 70/90 (max.)
ꢀCurrent:
ꢀ20-year data retention at 125°C
- Reliable operation for the life of the system
ꢀCFI (Common Flash Interface) compliant
- Provides device-specific information to the system,
allowing host software to easily reconfigure for different
Flash devices
- 9 mA typical active read current
- 20 mA typical program/erase current
- 200 nA typical CMOS standby
- 200 nA Automatic Sleep Mode current
ꢀFlexible sector architecture
ꢀCompatible with JEDEC-standards
- Pinout and software compatible with single-power-supply
Flash memory standard
- 16 Kbyte/ 8 KbyteX2/ 32 Kbyte/ 64 KbyteX31 sectors
- 8 Kword/ 4 KwordX2/ 16 Kword/ 32 KwordX31 sectors
- Any combination of sectors can be erased
- Supports full chip erase
- Superior inadvertent write protection
ꢀ
Polling and toggle bits
Data
- Provides a software method of detecting completion of
program or erase operations
- Sector protection:
ꢀReady /
pin (RY /
)
BY
BUSY
A hardware method of protecting sectors to prevent any
inadvertent program or erase operations within that
sector. Temporary Sector Unprotect feature allows code
changes in previously locked sectors
- Provides a hardware method of detecting completion of
program or erase operations (not available on 44-pin
SOP)
ꢀErase Suspend/Erase Resume
ꢀUnlock Bypass Program Command
- Suspends a sector erase operation to read data from, or
program data to, a non-erasing sector, then resumes the
erase operation
- Reduces overall programming time when issuing
multiple program command sequence
ꢀTop or bottom boot block configurations available
ꢀEmbedded Algorithms
ꢀHardware reset pin (
)
RESET
- Embedded Erase algorithm will automatically erase the
entire chip or any combination of designated sectors and
verify the erased sectors
- Hardware method to reset the device to reading array
data
ꢀPackage options
- 44-pin SOP or 48-pin TSOP (I) or 48-ball TFBGA
General Description
The A29L160A is a 16Mbit, 3.3 volt-only Flash memory
organized as 2,097,152 bytes of 8 bits or 1,048,576 words of
16 bits each. The 8 bits of data appear on I/O0 - I/O7; the 16
bits of data appear on I/O0~I/O15. The A29L160A is offered in
48-ball FBGA, 44-pin SOP and 48-Pin TSOP packages. This
device is designed to be programmed in-system with the
standard system 3.3 volt VCC supply. Additional 12.0 volt
VPP is not required for in-system write or erase operations.
However, the A29L160A can also be programmed in
standard EPROM programmers.
The A29L160A has the first toggle bit, I/O6, which indicates
whether an Embedded Program or Erase is in progress, or it
is in the Erase Suspend. Besides the I/O6 toggle bit, the
A29L160A has a second toggle bit, I/O2, to indicate whether
the addressed sector is being selected for erase. The
A29L160A also offers the ability to program in the Erase
Suspend mode. The standard A29L160A offers access times
of 70 and 90ns, allowing high-speed microprocessors to
operate without wait states. To eliminate bus contention the
device has separate chip enable (
), write enable (
)
WE
CE
and output enable (
) controls.
OE
The device requires only a single 3.3 volt power supply for
both read and write functions. Internally generated and
regulated voltages are provided for the program and erase
operations.
The A29L160A 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.
(May, 2005, Version 0.1)
1
AMIC Technology, Corp.
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