Pin Description:

Addressing cycle:

LDMF1GA:Notes: 1. CAx = column address, PAx = page address, BAx = block address ,the page address, block address called the row address. Byte address of page called column address
Page size x8: 8640 bytes (2048 + 64 bytes)
Block size: 128 pages (1024K + 8K bytes)
Block number: 4096 blocks

LDMF4GA:Notes: 1. CAx = column address, PAx = page address, BAx = block address ,the page address, block address called the row address. Byte address of page called column address
Page size x8: 8640 bytes (8192 + 448 bytes)
Block size: 128 pages (1024K + 56K bytes)
Block number: 4096 blocks

Instruction List:
Invalid block management
All locations of the device are erased (0xFF) except the address location in invalid block when shipped from the factory. The invalid block flag is located on the first byte of the spare area on the last page of the block. Invalid block data is non-0xFF. The system must establish invalid block management to avoid using invalid block. The start address of the first block is 0000h, which is guaranteed to be valid shipped from the factory.
The bad block table is created by the following flowchart (below).

Operating Steps:
1. An error occurred on page n of block A during erasing or programming operation.Copy the data from the first page to the (n-1) -th page of block A to the same position in the other empty block B.Copy the buffer data need to be saved to the n-th page position of block B.Add block A to the Bad block table.

1. Command latch cycle
2. Address latch cycle sequence
3. The input data latches cycle sequence
4. Output data latches cycle sequence
5. System instructions

Read operation:
Read operation is implemented by writing 00h-30h command to the command register. First, write 00h command, then, write the address with 5 cycles, last, write 30h command. After completion, the R/B(-) is released. the user determine the completion of the internal data transmission by detecting the status of R/B(-). Once the completion of the transmission, the user can start the RE, the data read out continuously.
Read operation sequence is as follows.

Programming operation:
Before programming operation, user must erase the block firstly. Programming operation is implemented by writing 80h-10h command to the command register. First write 80h command, then, write the address with 5 cycles, and then load the data into the internal data buffer register, last, write 10h after the completion of the command to confirm Write. After programming completion, the R/B(-) is released.
Programming operation sequence

Erase operation:
The erase operation command is 60h-D0h. First write 60h command, then write the address with 3 cycles , and then write D0h command to confirm the erase. After the completion of erasing, R/B(-) is released.

Erase operation sequence

Reset operationReset operation sequence

Note: If the write data to the page before operation to complete restoration command input, may cause data corruption, the damage is not only is page programming, can also affect the adjacent pages.

Sequential instructions(-45ºC~175ºC):As the temperature increases, the response speed of the device after operation can slow down.User program execution sequence a certain amount of allowance, suggest to increase the high temperature stability.

Timing parameter list(25ºC):

ZITN is a national high-tech enterprise, it was established in 2002 by many high tech engineers who have vast experience in microelectronic Industry. With 19 years' development, ZITN became a recognized industry leader in China, and we have total 175 employees, more than 49% of them are from . We mainly design, develop and manufacture high accuracy inclinometer, quartz based accelerometers, inertial measurement unit systems, IF Circuit products and Nand flash memory which widely used for aerospace, oil and gas drilling, geological exploration fields.

 

a. Experience in the hybrid thick film IC &high end sensors development and manufacture fields more than 19 years.
b. Invention patents more than 40 projects.
c. Scientific institution, production base more than 20000 square meters.
d. More than 49% of employees are from R&D team.
e. New cooperating customers more than1000 in recently 3 years.
f. Production capacity more than 100000/year;
g. Professional pre-sales, after-sales guide, solutions can be provided based on customers inquiries.
h. .


Miniature volume ! Independent creative technology!
From the servo-circuit production to assmble the sensors at one-stop .

Customized anti-static box.
Delivery via express (DHL, Fedex, TNT, UPS etc...)
Delivery date within 7-10 days after the shipment from our factory.

 

What kind of service can you provide?
Except the stanadrd model, we also can provide the products accorded with customers' detailed requirments, such as calibration, repair, upgrade etc...

What kind of test of the product will be done before leave your factory?
We have a strict quality control system to guarantee the product performance, such as Non-magnetic turntable calibration system, Shock&Vibration test system, temperature cycle test system etc...

Can I get a sample for evaluation?
Yes, we're willing to provide the sample for evaluation and guide you for any techical questions in the whole process.

What's the delivery options can I choose?
We can provide the airline express delivery service , such as DHL/Fedex/TNT express, normally 7- 10 days for transportation needed.

Can I visit your company if I'm interested?
Yes, our company locate at Qingdao city, we have over 175 employees here, included the R&D, production, Financial, Marketing, etc...