at49lh004 ATMEL Corporation, at49lh004 Datasheet - Page 2

• Manufacturer Part Number: at49lh004
• Description: 4-megabit Firmware Hub And Low-pin Count Flash Memory
• Manufacturer: ATMEL Corporation

Note:
2. Pin Configurations
2.1
2
[I/O0] FWH0/LAD0
[ ] Designates A/A Mux Interface.
32-lead PLCC
[A7] GPI1
[A6] GPI0
[A4] TBL
[A5] WP
[A3] ID3
[A2] ID2
[A1] ID1
[A0] ID0
AT49LH004
5
6
7
8
9
10
11
12
13
The memory array of the AT49LH004 can be sectored in two ways simply by using two differ-
ent erase commands. Using one erase command allows the device to contain a total of
11 sectors comprised of a 32-Kbyte boot sector, two 8-Kbyte sectors, a 16-Kbyte sector, and
seven 64-Kbyte sectors. The 32-Kbyte boot sector is located at the top (uppermost) of the
device’s memory address space. Alternatively, by using a different erase command, the mem-
ory array can be arranged into eight even erase sectors of 64-Kbyte each.
The AT49LH004 supports two hardware interfaces: The FWH/LPC interface for In-System
operations and the A/A Mux interface for programming during manufacturing. The Interface
Configuration (IC) pin of the device provides the control between these two interfaces. An
internal Command User Interface (CUI) serves as the control center between the device inter-
faces and the internal operation of the nonvolatile memory. A valid command sequence
written to the CUI initiates device automation.
Specifically designed for use in 3-volt systems, the AT49LH004 supports read, program, and
erase operations with a supply voltage range of 3.0V to 3.6V. No separate voltage is required
for programming and erasing.
The AT49LH004 utilizes fixed program and erase times, independent of the number of pro-
gram and erase cycles that have occurred. Therefore, the system does not need to be
calibrated or correlated to the cumulative number of program and erase cycles.
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IC [IC]
GND
NC
NC
VCC
INIT [OE]
FWH4/LFRAME [WE]
RES [RDY/BSY]
RES [I/O7]
2.2
[A10] GPI4
[RST] RST
[R/C] CLK
[A9] GPI3
[A8] GPI2
[A7] GPI1
[A6] GPI0
[A4] TBL
[A5] WP
[IC] IC
VCC
NC
NC
NC
NC
NC
NC
NC
NC
NC
40-lad TSOP
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2
3
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5
6
7
8
9
10
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32
31
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21
GND
VCC
FWH4/LFRAME [WE]
INIT [OE]
RES [RDY/BSY]
RES [I/O7]
RES [I/O6]
RES [I/O5]
RES [I/O4]
VCC
GND
GND
FWH3/LAD3 [I/O3]
FWH2/LAD2 [I/O2]
FWH1/LAD1 [I/O1]
FWH0/LAD0 [I/O0]
ID0 [A0]
ID1 [A1]
ID2 [A2]
ID3 [A3]
3383D–FLASH–6/05