With the function of smart phone camera being gradually enlarged and expanded,the optimization of fast focusing,optical image stabilization and depth of field imaging has become a technical hotspot.As a key storage element,NOR Flash plays an increasingly important role in the camera system.
 

 

　　In view of the strict requirements of camera module on the speed,power consumption and volume of storage devices,GT25D20/10/05E series NOR Flash chips represented by Yingshang provide a reliable solution.This series includes 2Mb,1Mb and 512Kb capacity models.The storage array is divided into 1024 pages with 256 bytes each,which supports a single programming operation with a maximum of 256 bytes.NOR Flash chip works in a wide voltage range of 1.65 V–3.6V,with standby current as low as 1μA and turn-off current as low as 0.1μA.The package is small and light,which is very suitable for camera modules with limited space.

 

 

　　This series of NOR Flash supports standard SPI,dual-output SPI and dual I/O SPI interfaces.The communication signals include serial clock(CLK),chip select(CS#),data input and output(IO0/DI,IO1/DO)and so on.In the dual I/O mode of fast reading,NOR Flash chip supports the clock frequency of 104MHz,and the equivalent data transmission rate reaches 208Mb/s,which can meet the requirements of fast camera startup and real-time parameter call.
 

 

　　NOR Flash chip GT25D20/10/05E has a write protection mechanism combining hardware and software,which can protect all or part of the storage area through write protection pin(WP#)or internal register setting.NOR Flash chip also supports JEDEC standard identification code and 64-bit unique ID,which is beneficial to product traceability and anti-counterfeiting.Its continuous reading mode supports 8/16/32/64 byte line feed,which is convenient for XIP(local execution)operation and further improves data reading efficiency.
 

　　Product characteristics of NOR Flash chip

 

　　①NOR Flash chip supports a variety of SPI protocols,and can be seamlessly connected with the mainstream camera main control chip.

 

　　②104MHz high-speed clock and dual I/O transmission architecture ensure real-time and reliable data access;The typical data storage time is 20 years,and the number of erasures exceeds 100,000 times.

 

　　③Low power design,standby current is only 7μA(typical),which is suitable for mobile devices sensitive to power consumption.

 

　　④Miniaturized package,small chip size and thin thickness,which meets the design requirements of compact camera module.

 

　　⑤Support software and hardware write protection,top/bottom block protection,and can customize a variety of camera module(CCM)solutions.

 

　　⑥NOR Flash chip has a unique serial number of 64 bits,which supports authentication and data encryption in the system.


Keywords :NOR Flash chip