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IMX8MMIEC Datasheet(PDF) 68 Page - NXP Semiconductors |
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IMX8MMIEC Datasheet(HTML) 68 Page - NXP Semiconductors |
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68 / 92 page  i.MX 8M Mini Applications Processor Datasheet for Industrial Products, Rev. 1, 07/2020 68 NXP Semiconductors Boot mode configuration 4 Boot mode configuration This section provides information on Boot mode configuration pins allocation and boot devices interfaces allocation. 4.1 Boot mode configuration pins Table 62 provides boot options, functionality, fuse values, and associated pins. Several input pins are also sampled at reset and can be used to override fuse values, depending on the value of BT_FUSE_SEL fuse. The boot option pins are in effect when BT_FUSE_SEL fuse is ‘0’ (cleared, which is the case for an unblown fuse). For detailed Boot mode options configured by the Boot mode pins, see the “System Boot, Fusemap, and eFuse” chapter in the i.MX 8M Mini Applications Processor Reference Manual (IMX8MMRM). Table 62. Fuses and associated pins used for boot Pin Directio n at Reset eFuse name State during reset (POR_B asserted) State after reset (POR_B deasserted) Details BOOT_MODE0 Input N/A Input with pull down Input with pull down Boot mode selection BOOT_MODE1 Input N/A Input with pull down Input with pull down SAI1_RXD0 Input BOOT_CFG[0] Input with pull down Input with pull down Boot options pin value overrides fuse settings for BT_FUSE_SEL = “0“. Signal configuration as fuse override input at power up. These are special I/O lines that control the boot configuration during product development. In production, the boot configuration can be controlled by fuses. SAI1_RXD1 Input BOOT_CFG[1] Input with pull down Input with pull down SAI1_RXD2 Input BOOT_CFG[2] Input with pull down Input with pull down SAI1_RXD3 Input BOOT_CFG[3] Input with pull down Input with pull down SAI1_RXD4 Input BOOT_CFG[4] Input with pull down Input with pull down SAI1_RXD5 Input BOOT_CFG[5] Input with pull down Input with pull down SAI1_RXD6 Input BOOT_CFG[6] Input with pull down Input with pull down SAI1_RXD7 Input BOOT_CFG[7] Input with pull down Input with pull down SAI1_TXD0 Input BOOT_CFG[8] Input with pull down Input with pull down SAI1_TXD1 Input BOOT_CFG[9] Input with pull down Input with pull down SAI1_TXD2 Input BOOT_CFG[10] Input with pull down Input with pull down SAI1_TXD3 Input BOOT_CFG[11] Input with pull down Input with pull down SAI1_TXD4 Input BOOT_CFG[12] Input with pull down Input with pull down SAI1_TXD5 Input BOOT_CFG[13] Input with pull down Input with pull down SAI1_TXD6 Input BOOT_CFG[14] Input with pull down Input with pull down |
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