BGA254 pinout

[Layder]

First in the WORLD!!! http://www.gsmforum.ru/images/smilies/smile.gif

Нарисовал сегодня. Тестируйте. Вопрос правда по ножке DS-DSL, для чего она.

http://www.gsmforum.ru/attachment.php?attachmentid=295435&d=1509292217&thumb=1 (http://www.gsmforum.ru/attachment.php?attachmentid=295435&d=1509292217)

http://www.gsmforum.ru/attachment.php?attachmentid=295436&d=1509292237&thumb=1 (http://www.gsmforum.ru/attachment.php?attachmentid=295436&d=1509292237)

о результатах пишите.

[Layder]

DS линия - Data strobe, cигнал от флешки к процессору для работы в Hi-Speed mode

Data strobe is Return Clock signal used in HS400 mode. This signal is generated by the device and used for data output and CRC status response output in HS400 mode. The frequency of this signal follows the frequency of CLK. For data output each cycle of this signal directs two bits transfer(2x) on the data - one bit for positive edge and the other bit for negative edge. For CRC status response output, the CRC status is latched on the positive edge only, and don't care on the negative edge. Data strobe signal is toggled only for Data out and CRC response (Align CMD response as well as CRC response to the DS in eMMC5.1)

It is not necessary to put pull-up/pull-down resistance on DS line since DS is internally pulled down. Direct connection to host is required and please float this pin if it is not used

e-NAND supports HS400 signaling to achieve a bus speed of 400MB/s via a 200MHz DDR clock frequency. HS400 mode supports only 8-bit bus width and the 1.8V V ccq . Due to the speed, the host may need to have an adjustable sampling point to reliably receive the incoming data (Read Data and CRC Response) with DS pin. e-NAND supports up to 5 Driver Strength.