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TMS320VC5509 Datasheet(PDF) 36 Page - Texas Instruments |
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TMS320VC5509 Datasheet(HTML) 36 Page - Texas Instruments |
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36 / 122 page  Functional Overview 36 April 2001 − Revised September 2004 SPRS163G 3.1.6 Boot Configuration The on-chip bootloader provides a method to transfer application code and tables from an external source to the on-chip RAM memory at power up. These options include: • Enhanced host-port interface (HPI) in multiplexed or nonmultiplexed mode • External 16-bit-wide asynchronous memory boot (via the EMIF) • Serial port boot (from McBSP0) with 8-bit or 16-bit element length • Serial EPROM boot (from McBSP0) supporting EPROMs with 16-bit or 24-bit address • USB boot • Direct execution from external 16-bit-wide asynchronous memory External pins select the boot configuration. The values of GPIO[3:0] are sampled, following reset, upon execution of the on-chip bootloader code. It is not possible to disable the bootloader at reset because the 5509 always starts execution from the on-chip ROM following a hardware reset. A summary of boot configurations is shown in Table 3−3. For more information on using the bootloader, see the Using the TMS320C5509/C5509A Bootloader application report (literature number SPRA375). Table 3−3. Boot Configuration Summary GPIO0 GPIO3 GPIO2 GPIO1 BOOT MODE PROCESS 0 0 0 0 Reserved 0 0 0 1 Serial (SPI) EPROM Boot (24-bit address) via McBSP0 0 0 1 0 USB 0 0 1 1 Reserved 0 1 0 0 Reserved 0 1 0 1 HPI – multiplexed mode 0 1 1 0 HPI – nonmultiplexed mode 0 1 1 1 Reserved 1 0 0 0 Execute from 16-bit-wide asynchronous memory (on CE1 space) 1 0 0 1 Serial (SPI) EPROM Boot (16-bit address) via McBSP0 1 0 1 0 Reserved 1 0 1 1 16-bit asynchronous memory (on CE1 space) 1 1 0 0 Reserved 1 1 0 1 Reserved 1 1 1 0 Standard serial boot via McBSP0 (16-bit data) 1 1 1 1 Standard serial boot via McBSP0 (8-bit data) |
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