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IMXRT1020RM(参考手册)
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NXP i.MX RT1020 Processor Reference Manual,恩智浦最新的IMX系列RT1020微处理器的参考手册。
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i.MX RT1020 Processor Reference
Manual
Document Number: IMXRT1020RM
Rev. 0, 06/2018
i.MX RT1020 Processor Reference Manual, Rev. 0, 06/2018
2 NXP Semiconductors
Contents
Section number Title Page
Chapter 1
Introduction
1.1 About This Document...................................................................................................................................................181
1.1.1 Audience...................................................................................................................................................... 181
1.1.2 Organization.................................................................................................................................................181
1.1.3 Suggested Reading.......................................................................................................................................181
1.1.3.1 General Information...................................................................................................................182
1.1.3.2 Related Documentation..............................................................................................................182
1.1.4 Conventions................................................................................................................................................. 182
1.1.5 Register Access............................................................................................................................................184
1.1.5.1 Register Diagram Field Access Type Legend............................................................................184
1.1.5.2 Register Macro Usage................................................................................................................184
1.1.6 Signal Conventions...................................................................................................................................... 186
1.1.7 Acronyms and Abbreviations.......................................................................................................................186
1.2 Introduction...................................................................................................................................................................189
1.2.1 Block Diagram............................................................................................................................................. 189
1.3 Features.........................................................................................................................................................................190
1.4 Target Applications.......................................................................................................................................................192
1.5 Endianness Support.......................................................................................................................................................192
Chapter 2
Memory Maps
2.1 Memory system overview.............................................................................................................................................193
2.2 ARM Platform Memory Map....................................................................................................................................... 193
Chapter 3
Interrupts, DMA Events, and XBAR Assignments
3.1 Overview.......................................................................................................................................................................201
3.2 CM7 interrupts..............................................................................................................................................................201
3.3 DMA Mux.....................................................................................................................................................................208
i.MX RT1020 Processor Reference Manual, Rev. 0, 06/2018
NXP Semiconductors 3
Section number Title Page
3.4 XBAR Resource Assignments......................................................................................................................................214
Chapter 4
External Signals and Pin Multiplexing
4.1 Overview.......................................................................................................................................................................223
4.1.1 Muxing Options........................................................................................................................................... 223
Chapter 5
Fusemap
5.1 Boot Fusemap............................................................................................................................................................... 243
5.2 Lock Fusemap...............................................................................................................................................................254
5.3 Fusemap Descriptions Table.........................................................................................................................................254
Chapter 6
External Memory Controllers
6.1 Overview.......................................................................................................................................................................269
6.2 Smart External Memory Controller (SEMC) Overview...............................................................................................269
6.3 eMMC/eSD/SDIO.........................................................................................................................................................271
6.4 Quad Serial Peripheral Interface...................................................................................................................................272
Chapter 7
System Debug
7.1 Overview.......................................................................................................................................................................273
7.2 Chip and ARM Platform Debug Architecture.............................................................................................................. 273
7.2.1 Debug Features............................................................................................................................................ 274
7.2.2 Debug system components...........................................................................................................................274
7.2.2.1 AMBA Trace Bus (ATB)...........................................................................................................274
7.2.2.2 CoreSight trace port interface (TPIU)........................................................................................275
7.2.2.3 Embedded Trace Macrocell (ETM)........................................................................................... 276
7.2.2.4 Instrumentation Trace Macrocell...............................................................................................276
7.2.3 Chip-Specific SJC Features......................................................................................................................... 277
7.2.3.1 JTAG Disable Mode.................................................................................................................. 277
7.2.3.2 JTAG ID.....................................................................................................................................277
7.2.4 System JTAG controller main features........................................................................................................278
i.MX RT1020 Processor Reference Manual, Rev. 0, 06/2018
4 NXP Semiconductors
Section number Title Page
7.2.5 SJC TAP Port...............................................................................................................................................278
7.2.6 SJC main blocks...........................................................................................................................................278
7.3 Miscellaneous............................................................................................................................................................... 279
7.3.1 Clock/Reset/Power.......................................................................................................................................279
7.4 Supported tools............................................................................................................................................................. 279
Chapter 8
System Boot
8.1 Chip-specific Boot Information.................................................................................................................................... 281
8.2 Overview.......................................................................................................................................................................284
8.3 Boot modes................................................................................................................................................................... 285
8.3.1 Boot mode pin settings.................................................................................................................................286
8.3.2 High-level boot sequence.............................................................................................................................286
8.3.3 Boot From Fuses mode (BOOT_MODE[1:0] = 00b)..................................................................................287
8.3.4 Serial Downloader (BOOT_MODE[1:0] = 01b)......................................................................................... 288
8.3.5 Internal Boot mode (BOOT_MODE[1:0] = 0b10)...................................................................................... 288
8.3.6 Boot security settings...................................................................................................................................289
8.4 Device configuration.....................................................................................................................................................290
8.4.1 Boot eFUSE descriptions.............................................................................................................................290
8.4.2 GPIO boot overrides.................................................................................................................................... 291
8.4.3 Device Configuration Data (DCD).............................................................................................................. 292
8.5 Device initialization......................................................................................................................................................292
8.5.1 Internal ROM/RAM memory map...............................................................................................................293
8.5.2 Boot block activation .................................................................................................................................. 293
8.5.3 Clocks at boot time...................................................................................................................................... 294
8.5.4 Enabling Caches...........................................................................................................................................296
8.5.5 Exception handling...................................................................................................................................... 296
8.5.6 Interrupt handling during boot..................................................................................................................... 297
8.5.7 Persistent bits............................................................................................................................................... 297
8.6 Boot devices (internal boot)..........................................................................................................................................297
i.MX RT1020 Processor Reference Manual, Rev. 0, 06/2018
NXP Semiconductors 5
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