TMS320C5517_15 Datasheet, PDF (184/197 Pages) Texas Instruments – TMS320C5517 Fixed-Point Digital Signal Processor

TMS320C5517
SPRS727C – AUGUST 2012 – REVISED APRIL 2014
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Table 6-33. BootMode Register Field Descriptions (continued)
Bit
Name
Description
Read-only bits that reflect the latched state of the EM_A[18:15] or GP[24:21] pins on the first clock
edge after RESET pin goes high. The Bootloader determines boot mode based on this value.
0000: Boot mode: 16-bit NOR flash data boot, system clock generator is in bypass mode.
0001: Boot mode: 16-bit or 8-bit NAND flash data boot, system clock generator is in bypass mode.
0010: Boot mode: UART 9600 baud boot, system clock generator output = input clock x 3
0011: Boot mode: UART 57600 baud boot, system clock generator output = input clock x 3
0100: Boot mode: UART 115200 baud boot, system clock generator output = input clock x 3
0101: Boot mode: SPI 16-bit or 24-bit address Boot (SPI_CLK < 1 MHz), system clock generator
output = input clock x 3
0110: Boot mode: SPI 16-bit or 24-bit address Boot (SPI_CLK < 10 MHz), system clock generator
output = input clock x 3
0111: Polling Mode 2: Check for valid boot image from peripherals in the following order: NOR,
8:5
BootMode[3:0] ^{NAND, SPI, I2C, SD/SDHC/MMC/eMMC Controller 0, McSPI, and UART/USB (infinite retry).(2)}
1000: Boot mode: I2C 16-bit address Boot, 400 kHz, system clock generator is in bypass mode.
1001: Boot mode: SD or SDHC, MMC, or eMMC Controller 0 card boot, system clock generator is
in bypass mode
1010: Boot mode: SD or SDHC, MMC, or eMMC Controller 1 card boot, system clock generator is
in bypass mode
1011: Polling Mode 1: Check for valid boot image from peripherals in the following order: NOR,
NAND, SPI, I2C, SD/SDHC/MMC/eMMC Controller 0, SD/SDHC/MMC/eMMC Controller 1, and
UART/USB (infinite retry).⁽²⁾
1100: Boot mode: UHPI 16-bit multiplexed mode boot, system clock generator output = input clock
x3
1101: Boot mode: McSPI 24-bit address serial flash at 10-MHz mode
1110: Boot mode: McSPI 24-bit address serial flash at 40-MHz mode
1111: Boot mode: USB boot, system clock generator output = input clock x 3
4:0
Reserved
Reserved
(2) If MMCx_CMD is low, the bootloader continues to check for a valid boot image in the card controller. MMCx_CMD must be high or
toggle in order to move from the card controller to the next peripheral for a valid boot image.
184 Detailed Description
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