AT45DB021A
2M bit. 2.7-Volt Only Serial-Interfa...
ETC
AT45DB021APDF下載
AT45DB021A
2-megabit 2.7-volt Only Serial DataF...
ATMEL [ATMEL Corporation]
AT45DB021APDF下載
AT45DB021A-JC
SPI Serial EEPROM
ETC
AT45DB021A-JCPDF下載
AT45DB021A-JC
2-megabit 2.7-volt Only Serial DataF...
ATMEL [ATMEL Corporation]
AT45DB021A-JCPDF下載
AT45DB021A-JI
SPI Serial EEPROM
ETC
AT45DB021A-JIPDF下載
AT45DB021A-JI
2-megabit 2.7-volt Only Serial DataF...
ATMEL [ATMEL Corporation]
AT45DB021A-JIPDF下載
AT45DB021A-RC
SPI Serial EEPROM
ETC
AT45DB021A-RCPDF下載
AT45DB021A-RC
2-megabit 2.7-volt Only Serial DataF...
ATMEL [ATMEL Corporation]
AT45DB021A-RCPDF下載
AT45DB021A-RI
SPI Serial EEPROM
ETC
AT45DB021A-RIPDF下載
AT45DB021A-RI
2-megabit 2.7-volt Only Serial DataF...
ATMEL [ATMEL Corporation]
AT45DB021A-RIPDF下載
有關(guān)at45db021a哪位用過at45db021a,我寫的程序運(yùn)行總有錯誤(讀狀態(tài)位總是0xff,寫入數(shù)據(jù)讀出來也是0xff,懷疑沒有寫進(jìn)去),很長時間了,不知道為什么,向高手請教。我看到過avrfreaks上的例程,我得跟他的差不多,但是不行,很奇怪。lyc@tdmarco.com
有關(guān)spi的時序問題!我在做8515和at45db021a進(jìn)行數(shù)據(jù)存儲。在at45db021a的datasheet上看的spi發(fā)命令然后讀取的時鐘順序共17個pules,但是我的spi收發(fā)只有16個,所以我的接收到的數(shù)據(jù)都要左移一位才是真實(shí)的數(shù)據(jù),這個問題怎么解決呢?有誰碰到過?
對,我用的8515的spi好像也有問題!我用8515的spi來和a/d和at45db021a來進(jìn)行數(shù)據(jù)處理。我接受a/d數(shù)據(jù)的時候,一切正常。但是我再用來往at45中發(fā)命令時,只有時鐘信號,沒有數(shù)據(jù)。我用記憶示波器看的。\ss接為輸出。此時a/d的片選已經(jīng)拉高。據(jù)我所知,還有兩個朋友的spi也遇到了類似的問題。我們在網(wǎng)上交流過。假如不是仿真器的毛病,那樓主的話就可信了。我昨天在這里貼的帖子難道被人給刪了?
at45db021a存儲時出現(xiàn)的問題我往buffer中寫的時候,讀出來數(shù)據(jù)是對的,但是,我從buffer 到page中寫后,數(shù)據(jù)的高字節(jié)丟失。比如,buffer中前兩個數(shù)據(jù)是0x1a,0xec,到了page中就成了0x00,0xec,我找不出原因啦,大家又碰到過的嗎?