Hi, Ulf On 2017/9/27 11:40, Shawn Lin wrote:
Per SD specification version 4.10, section 4.3.4, it says "pre-erased (ACMD23) will make a following Multiple Block Write operation faster compared to the same operation without preceding ACMD23". ACMD23 is mandatory for all sd cards and the spec also says "Command STOP_TRAN (CMD12) shall be used to stop the transmission in Write Multiple Block whether or not the preerase (ACMD23) feature is used."
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