IS25LD020-JVLE-TR ISSI, IS25LD020-JVLE-TR Datasheet - Page 8

• 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

REGISTERS (CONTINUED)
PROTECTION MODE
The IS25CD512/010 and IS25LD020 have two types of write-
protection mechanisms: hardware and software. These are
used to prevent irrelevant operation in a possibly noisy
environment and protect the data integrity.
HARDWARE WRITE-PROTECTION
The devices provide two hardware write-protection
features:
a. When inputting a program, erase or write status register
instruction, the number of clock pulse is checked to
determine whether it is a multiple of eight before the
executing. Any incomplete instruction command sequence
will be ignored.
b. The Write Protection (WP#) pin provides a hardware write
protection method for BP2, BP1, BP0 and SRWD in the
Status Register. Refer to the STATUS REGISTER
description.
c.
SOFTWARE WRITE PROTECTION
The IS25CD512/010 and IS25LD020 also provides two
software write protection features:
a. Before the execution of any program, erase or write status
register instruction, the Write Enable Latch (WEL) bit must be
enabled by executing a Write Enable (WREN) instruction. If
the WEL bit is not enabled first, the program, erase or write
register instruction will be ignored.
b. The Block Protection (BP2, BP1, BP0) bits allow part or
the whole memory area to be write-protected.
Integrated Silicon Solution, Inc.- www.issi.com
Rev. D
2/12/2013
Write inhibit is 1.8V, all write sequence will be ignored
when Vcc drop to 1.8V and lower
Table 9. Hardware Write Protection on Status
Register
SRWD
0
1
0
1
WP#
High
High
Low
Low
IS25CD512/010
Status Register
Protected
Writable
Writable
Writable
IS25LD020
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