AT49LH004-33JC SL383 Atmel, AT49LH004-33JC SL383 Datasheet - Page 18

• Manufacturer Part Number: AT49LH004-33JC SL383
• Description: IC FLASH 4MBIT 33MHZ 32PLCC
• Manufacturer: Atmel

Specifications of AT49LH004-33JC SL383

• Format - Memory: FLASH
• Memory Type: FLASH
• Memory Size: 4M (512K x 8)
• Speed: 33MHz
• Interface: Parallel
• Voltage - Supply: 3 V ~ 3.6 V
• Operating Temperature: 0°C ~ 85°C
• Package / Case: 32-PLCC
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Table 11-1.
18
Sector
10
9
8
7
6
5
4
3
2
1
0
AT49LH004
(Bytes)
Size
32K
16K
64K
64K
64K
64K
64K
64K
64K
8K
8K
Hardware Write Protection Options
078000H - 07FFFFH
076000H - 077FFFH
074000H - 075FFFH
070000H - 073FFFH
060000H - 06FFFFH
050000H - 05FFFFH
040000H - 04FFFFH
030000H - 03FFFFH
020000H - 02FFFFH
010000H - 01FFFFH
000000H - 00FFFFH
Address Range
protection to the top 64-Kbyte region (sectors 10, 9, 8, and 7) of the device when using the
Uniform Sector Erase command. This allows the TBL pin to protect a larger region for systems
that require a 64-Kbyte top boot sector rather than a 32-Kbyte top boot sector.
When the TBL pin is high, hardware write protection for program and erase operations to the
top 64-Kbyte region (in FWH mode) or the top 32-Kbyte boot sector (in LPC mode) is disabled.
Provided that the Write-Lock bits in the Sector Locking Registers are not set (detailed later),
sector erase or program commands can then be issued to the device to program or erase
these regions. In addition, in LPC mode, the entire top 64-Kbyte region (sectors 10, 9, 8, and
7) can be erased if using the Uniform Sector Erase command.
The Write Protect (WP) pin, which operates independently from the TBL pin, serves the same
basic function as the TBL pin for the remaining sectors except the top boot sector (in LPC
mode) or the top 64-Kbyte region (in FWH mode). When the WP pin is held low in LPC mode,
program and standard Sector Erase command operations to sectors 9 through 0 will not be
allowed. If using the Uniform Sector Erase command, then erase operations to sectors 6
through 0 cannot be performed, and erase protection for sectors 10 through 7 will be con-
trolled by the TBL pin. In FWH mode, the WP pin will always protect sectors 6 through 0
against both erase and program operations.
The TBL and WP pins must be set to the desired protection state prior to starting a program or
erase operation because they are sampled at the beginning of the operation. Changing the
state of TBL or WP during a program or erase operation may cause unpredictable results. The
new lock status will take place after the program or erase operation completes.
Program and
Commands
FWH Mode
For All
Erase
TBL
TBL
TBL
TBL
WP
WP
WP
WP
WP
WP
WP
Byte Program (40H or 10H)
Sector Erase (21H)
For the Following
Hardware Write Protection
Commands:
TBL
WP
WP
WP
WP
WP
WP
WP
WP
WP
WP
LPC Mode
Uniform Sector Erase (20H)
For the Following
Command:
TBL
TBL
TBL
TBL
WP
WP
WP
WP
WP
WP
WP
3383D–FLASH–6/05