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DM368ZCEZ Datasheet(PDF) 52 Page - Texas Instruments |
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DM368ZCEZ Datasheet(HTML) 52 Page - Texas Instruments |
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52 / 208 page  TMS320DM368 SPRS668C – APRIL 2010 – REVISED JUNE 2011 www.ti.com • ARM ROM Boot - MMC/SD Mode – No support for a full firmware boot. Instead, copies a second stage User Boot Loader (UBL) from MMC/SD to ARM Internal RAM (AIM) and transfers control to the user software. – Support for MMC/SD Native protocol (MMC/SD SPI protocol is not supported) – Support for descriptor error detection and retry (up to 24 times) when loading UBL – Support for up to 30KB UBL (32KB - ~2KB for RBL stack) – SDHC boot supported by RBL • ARM ROM Boot - UART mode – If the state of BTSEL[2:0] pins at reset is 011, then the UART boot mode executes. This mode enables a small program, referred to here as a user boot loader (UBL), to be downloaded to the on-chip ARM internal RAM via the on-chip serial UART and executed. A host program, (referred to as serial host utility program), manages the interaction with RBL and provides a means for operator feedback and input. The UART boot mode execution assumes the following UART settings: 24 MHz reference clock, Time-Out 500 ms, one-shot Serial RS-232 port 115.2 Kbps, 8-bit, no parity, one stop bit Command, data, and checksum format Everything sent from the host to the device UART RBL must be in ASCII format – No support for a full firmware boot. Instead, loads a second stage user boot loader (UBL) via UART to ARM internal RAM (AIM) and transfers control to the user software. – Support for up to 30KB UBL (32KB - ~2KB for RBL stack) • ARM ROM Boot – USB Mode – No support for a full firmware boot. Instead, loads a second stage User Boot Loader (UBL) via USB to ARM Internal RAM (AIM) and transfers control to the users software. • ARM ROM Boot – SPI Mode – The device will copy UBL to ARM Internal RAM (AIM) via SPI interface from a SPI peripheral like SPI EEPROM. RBL will then transfer control to the UBL. • ARM ROM Boot – EMAC Mode – The device will send a boot request packet and the host/server will respond with the boot packets. RBL will wait for all boot packets to arrive and then transfer control to the UBL which is received via boot packets. In EMAC boot mode an I2C EEPROM or SPI EEPROM is necessary for programming EMAC descriptor (including EMAC address for the device) Note: If a magic number is not found in the EEPROM, then the EMAC boot mode will use a default MAC address. In this case, there will be no magic number support. • ARM ROM Boot – HPI Mode – The Host will copy UBL to ARM Internal RAM (AIM) via HPI interface and notify the ROM bootloader after copy is finished. RBL will then transfer control to the UBL. The general boot sequence is shown in Figure 3-1. For more information, refer to the TMS320DM36x DMSoC ARM Subsystem Reference Guide (literature number SPRUFG5). 52 Device Configurations Copyright © 2010–2011, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Link(s): TMS320DM368 |
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