TMS320x280x, 2801x, 2804x Boot ROM Reference Guide Literature Number: SPRU722C November 2004–Revised October 2006 Contents Preface ....................................................................................................................................... 5 1 Boot ROM Memory Map ....................................................................................................... 8 1.1 On-Chip Boot ROM IQ Math Tables .................................................................................. 9 1.2 CPU Vector Table ...................................................................................................... 10 2 Bootloader Features .......................................................................................................... 11 2.1 Bootloader Functional Operation .................................................................................... 11 2.2 Bootloader Device Configuration .................................................................................... 13 2.3 PLL Multiplier Selection ............................................................................................... 13 2.4 Watchdog Module ...................................................................................................... 13 2.5 Taking an ITRAP Interrupt ............................................................................................ 13 2.6 Internal Pullup Resisters .............................................................................................. 13 2.7 PIE Configuration ...................................................................................................... 14 2.8 Reserved Memory ..................................................................................................... 14 2.9 Bootloader Modes ..................................................................................................... 14 2.10 Bootloader Data Stream Structure ................................................................................... 17 2.11 Basic Transfer Procedure ............................................................................................. 22 2.12 InitBoot Assembly Routine ............................................................................................ 23 2.13 SelectBootMode Function ............................................................................................ 24 2.14 CopyData Function .................................................................................................... 26 2.15 SCI_Boot Function ..................................................................................................... 26 2.16 Parallel_Boot Function (GPIO) ....................................................................................... 28 2.17 SPI_Boot Function ..................................................................................................... 33 2.18 I2C Boot Function ...................................................................................................... 35 2.19 eCAN Boot Function ................................................................................................... 38 2.20 ExitBoot Assembly Routine ........................................................................................... 40 3 Building the Boot Table ...................................................................................................... 42 3.1 The C2000 Hex Utility ................................................................................................. 42 3.2 Example: Preparing a COFF File For eCAN Bootloading ........................................................ 43 4 Bootloader Code Overview ................................................................................................. 46 4.1 Boot ROM Version and Checksum Information .................................................................... 46 4.2 Bootloader Code Revision History ................................................................................... 47 4.3 Bootloader Code Listing (V3.0) ...................................................................................... 48 4.4 Bootloader Code Listing (V4.0) ...................................................................................... 79 Appendix A Revision History ...................................................................................................... 84 2 Table of Contents SPRU722C–November 2004–Revised October 2006 Submit Documentation Feedback Copyright © 2004–2006, Texas Instruments Incorporated www.ti.com List of Figures 1 Memory Map of On-Chip ROM............................................................................................ 8 2 Vector Table Map.......................................................................................................... 10 3 Bootloader Flow Diagram ................................................................................................ 12 4 Boot ROM Function Overview ........................................................................................... 15 5 Jump-to-Flash Flow Diagram ............................................................................................ 15 6 Flow Diagram of Jump to M0 SARAM.................................................................................. 16 7 Flow Diagram of Jump-to-OTP Memory................................................................................ 16 8 Bootloader Basic Transfer Procedure .................................................................................. 22 9 Overview of InitBoot Assembly Function ............................................................................... 23 10 Overview of the SelectBootMode Function ............................................................................ 25 11 Overview of CopyData Function ........................................................................................ 26 12 Overview of SCI Bootloader Operation................................................................................. 26 13 Overview of SCI_Boot Function ......................................................................................... 27 14 Overview of SCI_GetWordData Function ............................................................................. 28 15 Overview of Parallel GPIO bootloader Operation ..................................................................... 28 16 Parallel GPIO bootloader Handshake Protocol........................................................................ 29 17 Parallel GPIO Mode Overview........................................................................................... 29 18 Parallel GPIO Mode - Host Transfer Flow ............................................................................. 30 19 16-Bit Parallel GetWord Function ....................................................................................... 31 20 8-Bit Parallel GetWord Function......................................................................................... 32 21 SPI Loader ................................................................................................................. 33 22 Data Transfer From EEPROM Flow .................................................................................... 34 23 Overview of SPIA_GetWordData Function ............................................................................ 35 24 EEPROM Device at Address 0x50...................................................................................... 35 25 Overview of I2C_Boot Function ......................................................................................... 36 26 Random Read.............................................................................................................. 37 27 Sequential Read ........................................................................................................... 38 28 Overview of eCAN-A bootloader Operation............................................................................ 38 29 ExitBoot Procedure Flow ................................................................................................. 40 SPRU722C–November 2004–Revised October 2006 List of Figures 3 Submit Documentation Feedback Copyright © 2004–2006, Texas Instruments Incorporated www.ti.com List of Tables 1 Vector Locations........................................................................................................... 11 2 Configuration for Device Modes ......................................................................................... 13 3 Boot Mode Selection ...................................................................................................... 14 4 General Structure Of Source Program Data Stream In 16-Bit Mode .............................................. 18 5 LSB/MSB Loading Sequence in 8-Bit Data Stream................................................................... 20 6 Boot Mode Selection ..................................................................................................... 24 7 SPI 8-Bit Data Stream ................................................................................................... 33 8 I2C 8-Bit Data Stream .................................................................................................... 37 9 Bit-Rate Values for Different XCLKIN Values.......................................................................... 38 10 eCAN 8-Bit Data Stream ................................................................................................