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常问问题
常问问题
Q: HOW DO YOU CONFIGURE DATAFLASH BINARY AND STANDARD PAGE SIZES?
A: The DataFlash ships with a DEFAULT page size of 264 or 528 Bytes. To configure the Dataflash in the Binary mode (256 / 512 Byte pages) please refer to the following steps at power up:
- Power up.
- Read the Status Register byte 1, bit 0.
- 如果这个位为1,那么所有很好,所以开始运行。
- 如果该位为0,则设备配置为264字节页面大小。
- Send the command 0x3D, 0x2A, 0x80, 0xA6 to change it to a ‘Binary’ page size.
- Start running . This should only need to be done once at first power up. and allows you to fit 2B and non 2B parts with no changes.
问:我需要在设计中替换AT45DB011D。这部分和AT45DB021E之间有什么区别?
A: You can download a comparison here.
Q: WHERE CAN I FIND SIMULATION TOOLS FOR ADESTO PRODUCTS?
答:访问我们的Simulation Tools页。
问:我在哪里可以找到Adesto产品的源代码示例?雷电竞官网登录
A: Download theSource Code Examples application note
Q: WHERE CAN I FIND PROGRAMMER SUPPORT FOR ADESTO PRODUCTS?
A: Visit the程序员支持page
Q: WHAT DO THE PART NUMBER SUFFIXES SL954 (AND SL955) STAND FOR?
A: This indicates the product is binary page size. Please refer to the product datasheet for specifics regarding the binary page size.
问:我需要在我的设计中替换AT25DF041A。这部分和AT25SF041之间有什么区别?
A: You can download a comparison here.
问:部分号后缀SL383代表什么?
答:这表明该产品在磁带和卷轴上发货。
问:我可以在哪里获得SS(.150 SOIC)和M(UDFN)包类型的PAD布局建议?
答:您可以在此处下载PDF与布局建议。
Q: I NEED TO TRANSITION FROM THE AT45DB641D-CNU TO THE AT45DB641E – WITH THE S OR MW PACKAGE. WHERE CAN I GET PAD LAYOUT SUGGESTIONS FOR THE S (.208 SOIC) AND MW [MLF (VDFN)] PACKAGE TYPES?
答:您可以在此处下载PDF与布局建议。
下载AT45DB641E-SHN, AT45DB641E-MWHN
Q: I NEED MORE TECHNICAL INFORMATION ON THE TRANSITION ( MIGRATION ) FROM DATAFLASH “D” SERIES TO “E” SERIES PARTS. WHERE CAN I GET THIS?
A: Download the guides.
问:我需要在设计中替换AT25DF641。这部分和AT25DF641A之间有什么区别?
A: You can download a comparison here.
Q: I NEED TO REPLACE THE AT25F512B IN MY DESIGN. WHAT IS THE DIFFERENCE BETWEEN THIS PART AND THE AT25DN512C?
A: You can download a comparison here.
问:我需要在我的设计中替换AT25DF041A。WHAT IS THE DIFFERENCE BETWEEN THIS PART AND THE AT25DF081A AND AT26DF081A?
A: You can download a comparison here.
Q: WHAT IS ADESTO’S RECOMMENDED REFLOW SOLDERING TEMPERATURE PROFILE FOR SERIAL FLASH PRODUCTS?
答:我们关注JEDEC的标准。你可以在这里下载。请参见表5-2和图5-1(第7页和第8页)。
问:字节编程,页面编程和顺序编程有什么区别?如何与页面编程不同的顺序编程?
A: There are three ways to program the serial flash device: 1) Byte by byte, 2) Page program, and 3) Sequential program.
- 字节编程要求命令代码以及三个地址字节,然后是数据字节。当芯片选择变为高电平时,字节被编程为内存。要编程下一个字节,重复此序列。命令,3 x addr,1 x数据。
- 页面编程类似于字节编程,而是当加载第一个数据字节然后等待设备来编程该数据时,可以保持CS低,并继续到最多256个字节的时钟缓冲。然后,当CS变为高电平时,所有256个字节将被编程为从命令开始时指定的地址位置顺序地址位置。这只能是最多256字节(这是片上SRAM缓冲区的大小)。命令,3 x addr,1 x数据,1 x数据,1 x数据~~~~~~ 1 x数据。
- 顺序程序模式与字节程序相同,但使用内部地址计数器来跟踪使用的最后一个地址。这意味着用户只需要加载第一个数据字节的地址,并且一旦编程,它们就可以发送ADH或AFH命令和下一个数据字节(不需要再次发送3个地址字节)。虽然设备仍然必须等待,但是每个数据字节都被编程,但您不需要继续发送地址信息的事实使整个过程一点更快。命令,3 x地址,1 x数据(等待程序循环),命令,1 x数据(等待),命令,1 x数据(等待)等。
在所有情况下,要编程的地址位置,是否必须首先擦除字节编程,页面编程或顺序编程。在Adesto Fusion Memories上,您可以使用页面擦除(256byte页面)或4kbyte,32kbyte和64kbyte块擦除。
In terms of user software, sequential programming is easier to implement, but page programming will still be slightly faster. Byte programming is good for situations where one or two bytes need to be programmed to a random location.
问:Adesto串行Flash和DataFlash设备的参数CPHA和CPOL是什么?
A: CPOL and CPHA define the clock modes. CPOL indicates the idle level for SCK (0 for idle low, 1 for idle high). CPHA indicates the clock phase. Adesto devices operate in mode-0 (CPOL=0, CPHA=0) and in mode-3 (CPOL=1, CPHA=1).