IS25LD020-JVLE-TR ISSI, IS25LD020-JVLE-TR Datasheet - Page 38

• Manufacturer Part Number: IS25LD020-JVLE-TR
• Description: Flash 2M 2.3-3.6V 100Mhz Serial Flash
• Manufacturer: ISSI

Specifications of IS25LD020-JVLE-TR

• Rohs: yes
• Data Bus Width: 8 bit
• Memory Type: Flash
• Memory Size: 2 Mbit
• Architecture: Uniform
• Timing Type: Synchronous
• Interface Type: SPI
• Supply Voltage - Max: 3.6 V
• Supply Voltage - Min: 2.3 V
• Maximum Operating Current: 15 mA
• Operating Temperature: - 40 C to + 105 C
• Mounting Style: SMD/SMT
• Package / Case: VVSOP-8
• Organization: 256 K x 8

Instruction Name
SECT_UNLOCK
SECT_LOCK
Appendix2: Sector Unlock function
SEC_UNLOCK COMMAND OPERATION
The Sector unlock command allows the user to select a
specific sector to allow program and erase operations.
This instruction is effective when the blocks are
designated as write-protected through the BP0, BP1 and
BP2 bits in the status register. Only one sector can be
enabled at any time. To enable a different sector, a
Figure d. Sector Unlock Sequence
Note: 1.If the clock number will not match 8 clocks(command)+ 24 clocks (address), it will be ignored.
Integrated Silicon Solution, Inc.- www.issi.com
Rev. D
2/12/2013
SCK
2.It must be executed write enable (06h) before sector unlock instructions.
CS
SI
In the sector unlock procedure, [A11:A0] needs equal to “0”, unlock procedure is
completed, otherwise chip will regard it as illegal command.
Sector unlock
1
2
06h
Code
Hex
7 8
26h
24h
Operation
Sector unlock
Sector lock
1
2
26h
7 8 9
A23-A16
10
previously enabled sector must be disabled by executing
a Sector Lock command. The instruction code is followed
by a 24-bit address specifying the target sector, but A0
through A11 are not decoded. The remaining sectors
within the same block remain in read-only mode.
15 16 17 18
A15-A8
23 24 25 26
A7-A0
IS25CD512/010
Command
Cycle
4 Bytes
1 Byte
31 32
IS25LD020
Maximum
Frequency
100 MHz
100 MHz
38