i.MX ProcessorsのトピックQSPI NOR Flash type setting in BOOT_CFG eFuse https://community.nxp.com/t5/i-MX-Processors/QSPI-NOR-Flash-type-setting-in-BOOT-CFG-eFuse/m-p/770768#M119681 <HTML><HEAD></HEAD><BODY><P>QSPI NOR Flash type setting in BOOT_CFG eFuse</P><P></P><P><span class="lia-inline-image-display-wrapper" image-alt="pastedImage_1.png"><img src="https://community.nxp.com/t5/image/serverpage/image-id/35020i04A48279D72410AD/image-size/large?v=v2&amp;px=999" role="button" title="pastedImage_1.png" alt="pastedImage_1.png" /></span></P><P><SPAN style="font-size: 10.0pt;">What is "device supports 3B read by default" means? I cannot find on data sheet of flash memory ICs. </SPAN></P><P><SPAN style="font-size: 10.0pt;">Say IS25WPxxx flash&nbsp;support "3B read, on fast read dual output "4B read" on unique ID number! What is it? </SPAN><SPAN style="font-size: 10.0pt;">N25Q32Axxx look like&nbsp;support both 3B (1-1-4 fast read command code) or 4B (4-4-4 fast read command code), which setting for it in BOOT_CFG2[2:0]?</SPAN></P><P><SPAN style="font-size: 10.0pt;">Any help is appreciated!</SPAN></P></BODY></HTML> Mon, 19 Mar 2018 14:34:21 GMT jamesli 2018-03-19T14:34:21Z QSPI NOR Flash type setting in BOOT_CFG eFuse https://community.nxp.com/t5/i-MX-Processors/QSPI-NOR-Flash-type-setting-in-BOOT-CFG-eFuse/m-p/770768#M119681 <HTML><HEAD></HEAD><BODY><P>QSPI NOR Flash type setting in BOOT_CFG eFuse</P><P></P><P><span class="lia-inline-image-display-wrapper" image-alt="pastedImage_1.png"><img src="https://community.nxp.com/t5/image/serverpage/image-id/35020i04A48279D72410AD/image-size/large?v=v2&amp;px=999" role="button" title="pastedImage_1.png" alt="pastedImage_1.png" /></span></P><P><SPAN style="font-size: 10.0pt;">What is "device supports 3B read by default" means? I cannot find on data sheet of flash memory ICs. </SPAN></P><P><SPAN style="font-size: 10.0pt;">Say IS25WPxxx flash&nbsp;support "3B read, on fast read dual output "4B read" on unique ID number! What is it? </SPAN><SPAN style="font-size: 10.0pt;">N25Q32Axxx look like&nbsp;support both 3B (1-1-4 fast read command code) or 4B (4-4-4 fast read command code), which setting for it in BOOT_CFG2[2:0]?</SPAN></P><P><SPAN style="font-size: 10.0pt;">Any help is appreciated!</SPAN></P></BODY></HTML> Mon, 19 Mar 2018 14:34:21 GMT https://community.nxp.com/t5/i-MX-Processors/QSPI-NOR-Flash-type-setting-in-BOOT-CFG-eFuse/m-p/770768#M119681 jamesli 2018-03-19T14:34:21Z Re: QSPI NOR Flash type setting in BOOT_CFG eFuse https://community.nxp.com/t5/i-MX-Processors/QSPI-NOR-Flash-type-setting-in-BOOT-CFG-eFuse/m-p/770769#M119682 <HTML><HEAD></HEAD><BODY><P>Hello Jian,</P><P></P><P>&nbsp; &nbsp; &nbsp;For i.MXRT1050 + QSPI application,&nbsp; we only use "<STRONG>3B read by default</STRONG>", don't care "4B read by default"!</P><P>&nbsp; &nbsp; &nbsp;3B read means :&nbsp; 1 Byte command +&nbsp; 3 Byte Address. I think you can find similar description your QSPI Nor Flash datasheet.</P><P></P><P>Have a nice day!</P><P>TIC weidong</P></BODY></HTML> Tue, 20 Mar 2018 06:27:40 GMT https://community.nxp.com/t5/i-MX-Processors/QSPI-NOR-Flash-type-setting-in-BOOT-CFG-eFuse/m-p/770769#M119682 weidong_sun 2018-03-20T06:27:40Z