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AMIC

49LF004 Datasheet Preview

49LF004 Datasheet

A49LF004

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A49LF004
4 Mbit CMOS 3.3Volt-only Firmware Hub Flash Memory
Document Title
4 Mbit CMOS 3.3 Volt-only Firmware Hub Flash Memory
Revision History
Rev. No.
0.0
0.1
0.2
1.0
History
Initial issue
Add Pb-Free package type
Change Ordering Information
Final version release
Issue Date
November 21, 2003
August 20, 2004
October 21, 2005
December 13, 2005
Remark
Preliminary
Final
(December, 2005, Version 1.0)
AMIC Technology, Corp.




AMIC

49LF004 Datasheet Preview

49LF004 Datasheet

A49LF004

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A49LF004
4 Mbit CMOS 3.3Volt-only Firmware Hub Flash Memory
FEATURES
• Single Power Supply Operation
- Low voltage range: 3.0 V - 3.6 V for Read and Write
Operations
• 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
algorithms
- Typical 10 µs/byte programming time
- Typical 1s block erase time
• Two Operational Modes
- Firmware Hub Interface (FWH) Mode for in-system
operation
- 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 interface
- 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
block
- Minimum 20 years data retention
• Compatible Pin-out and Packaging
- 32-pin (8 mm x 14 mm) TSOP (TYPE I)
- 32-pin PLCC
GENERAL DESCRIPTION
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.
(December, 2005, Version 1.0)
1 AMIC Technology, Corp.


Part Number 49LF004
Description A49LF004
Maker AMIC
Total Page 30 Pages
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