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A49LF004 Datasheet(PDF) 2 Page - AMIC Technology

Part No. A49LF004
Description  4 Mbit CMOS 3.3Volt-only Firmware Hub Flash Memory
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Maker  AMICC [AMIC Technology]
Homepage  http://www.amictechnology.com

A49LF004 Datasheet(HTML) 2 Page - AMIC Technology

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4 Mbit CMOS 3.3Volt-only Firmware Hub Flash Memory
(November, 2003, Version 0.0)
AMIC Technology, Corp.
• Single Power Supply Operation
Low voltage range: 3.0 V - 3.6 V for Read and Write
• Standard Intel Firmware Hub Interface
Read compatible to Intel® 82802 Firmware
Hub devices
• Memory Configuration
512K x 8 (4 Mbit)
• Block Architecture
4Mbit: eight uniform 64KByte blocks
Supports full chip erase for Address/Address
Multiplexed (A/A Mux) mode
• Automatic Erase and Program Operation
Embedded Byte Program and Block/Chip Erase
Typical 10 µs/byte programming time
Typical 1s block erase time
• Two Operational Modes
Firmware Hub Interface (FWH) Mode for in-system
Address/Address Multiplexed (A/A Mux) Interface
Mode for programming equipment
• Firmware Hub (FWH) Mode
33 MHz synchronous operation with PCI bus
5-signal communication interface for in-system read
and write operations
Standard SDP Command Set
Data# Polling (I/O7) and Toggle Bit (I/O6) features
Block Locking Register for all blocks
4 ID pins for multi-chip selection
5 GPI pins for General Purpose Input Register
TBL# pin for hardware write protection to Boot Block
WP# pin for hardware write protection to whole
memory array except Boot Block
• Address/Address Multiplexed (A/A Mux) Mode
11-pin multiplexed address and 8-pin data I/O
Supports fast programming on EPROM programmers
Standard SDP Command Set
Data# Polling (I/O7) and Toggle Bit (I/O6) features
• Lower Power Consumption
Typical 12mA active read current
Typical 24mA program/erase current
• High Product Endurance
Guarantee 100,000 program/erase cycles for each
Minimum 20 years data retention
• Compatible Pin-out and Packaging
32-pin (8 mm x 14 mm) TSOP (TYPE I)
32-pin PLCC
The A49LF004 flash memory device is designed to be read-
compatible with the Intel 82802 Firmware Hub (FWH)
device for PC-BIOS application. This device is designed to
use a single low voltage, range from 3.0 Volt to 3.6 Volt
power supply to perform in-system or off-system read and
write operations. It provides protection for the storage and
update of code and data in addition to adding system
design flexibility through five general-purpose inputs. Two
interface modes are supported by the A49LF004: Firmware
Hub (FWH) Interface mode for In-System programming and
Address/Address Multiplexed (A/A Mux) mode for fast
factory programming of PC-BIOS applications.
The memory is divided into eight uniform 64Kbyte blocks
that can be erased independently without affecting the data
in other blocks. Blocks also can be protected individually to
prevent accidental Program or Erase commands from
modifying the memory. The Program and Erase operations
are executed by issuing the Program/Erase commands into
the command interface by which activating the internal
control logic to automatically process the Program/Erase
procedures. The device can be programmed on a byte-by-
byte basis after performing the Erase operation. In addition
to the Block Erase operation, the Chip Erase feature is
provided in A/A Mux mode that allows the whole memory to
be erased in one single Erase operation. The A49LF004
provides the status detection such as Data# Polling and
Toggle Bit Functions in both FWH and A/A Mux modes. The
process or completion of Program and Erase operations
can be detected by reading the status bits.
The A49LF004 is offered in 32-lead TSOP and 32-lead
PLCC packages. See Figures 1 and 2 for pin assignments
and Table 1 for pin descriptions.

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