IS25LD020-JVLE-TR ISSI, IS25LD020-JVLE-TR Datasheet - Page 35

• 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

IS25CD512/010
IS25LD020
Read Safe Guard register
The READ Safe Guard instruction code is transmitted via the SlO line, followed by three address bytes (A23 - A0) of the first
register location to be read. The first byte data (D7 - D0) addressed is then shifted out on the SO line, MSb first. The address
is automatically incremented after each byte of data is shifted out. The read operation can be terminated at any time by
driving CE# high (VIH) after the data comes out.
CS
1
2
7 8
9 10
23 24
25 26
31 32
33 34
39 40
41 42
47 48
SCK
SI
2Fh
A23-A0
nd
2
byte
st
1
byte
SO
D7-D0
D7-D0
Fig a. Timing waveform of Read Safe guard register
Erase Safe Guard register
If we want to erase the safe guard register to let the flash into unprotect status, it needs five continuous instructions. If any
instruction is wrong, the erase command will be ignored. Erase wait time follow product erase timing spec.
Fig b. shows the complete steps for Erase safe guard register.
Program Safe Guard register
If we want to erase the safe guard register to let the flash into unprotect status, it needs five continuous instructions. If any
instruction is wrong, the program command will be ignored. The Program safe guard instruction allows up to 256 bytes data
to be programmed into memory in a single operation. Program wait time follow product program timing spec.
Fig c. shows the complete steps for program safe guard register.
Integrated Silicon Solution, Inc.- www.issi.com
35
Rev. D
2/12/2013