Datasheet

TMS320F28030, TMS320F28031, TMS320F28032

TMS320F28033, TMS320F28034, TMS320F28035

www.ti.com

SPRS584J –APRIL 2009–REVISED OCTOBER 2013

3.2.8 L0 SARAM, and L1, L2, and L3 DPSARAMs

The device contains up to 8K x 16 of single-access RAM. To ascertain the exact size for a given device,

see the device-specific memory map figures in Section 3.1. This block is mapped to both program and

data space. Block L0 is 2K in size and is dual mapped to both program and data space. Blocks L1 and L2

are both 1K in size and are shared with the CLA which can ultilize these blocks for its data space. Block

L3 is 4K (2K on the 28031 device) in size and is shared with the CLA which can ultilize this block for its

program space. DPSARAM refers to the dual-port configuration of these blocks.

3.2.9 Boot ROM

The Boot ROM is factory-programmed with boot-loading software. Boot-mode signals are provided to tell

the bootloader software what boot mode to use on power up. The user can select to boot normally or to

download new software from an external connection or to select boot software that is programmed in the

internal Flash/ROM. The Boot ROM also contains standard tables, such as SIN/COS waveforms, for use

in math-related algorithms.

Table 3-6. Boot Mode Selection

GPIO34/COMP2OUT/

MODE GPIO37/TDO TRST MODE

COMP3OUT

3 1 1 0 GetMode

2 1 0 0 Wait (see Section 3.2.10 for description)

1 0 1 0 SCI

0 0 0 0 Parallel IO

EMU x x 1 Emulation Boot

3.2.9.1 Emulation Boot

When the emulator is connected, the GPIO37/TDO pin cannot be used for boot mode selection. In this

case, the boot ROM detects that an emulator is connected and uses the contents of two reserved SARAM

locations in the PIE vector table to determine the boot mode. If the content of either location is invalid,

then the Wait boot option is used. All boot mode options can be accessed in emulation boot.

3.2.9.2 GetMode

The default behavior of the GetMode option is to boot to flash. This behavior can be changed to another

boot option by programming two locations in the OTP. If the content of either OTP location is invalid, then

boot to flash is used. One of the following loaders can be specified: SCI, SPI, I

C, CAN, or OTP.

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