L0, L1, H0 Sarams; Boot Rom; Boot Mode Selection - Texas Instruments TMS320F2809 Data Manual

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3.2.8 L0, L1, H0 SARAMs

The F2809 and F2808 each contain an additional 16K x 16 of single-access RAM, divided into three
blocks (L0-4K, L1-4K, H0-8K). The F2806 contains an additional 8K x 16 of single-access RAM, divided
into two blocks (L0-4K, L1-4K). The F2802, F2801, C2802, and C2801 each contain an additional 4K x 16
of single-access RAM (L0-4K). Each block can be independently accessed to minimize CPU pipeline
stalls. Each block is mapped to both program and data space.

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.
MODE
Boot to Flash/ROM Jump to Flash/ROM address 0x3F 7FF6
You must have programmed a branch instruction here prior
to reset to redirect code execution as desired.
SCI-A Boot Load a data stream from SCI-A
SPI-A Boot Load from an external serial SPI EEPROM on SPI-A
I2C Boot Load data from an external EEPROM at address 0x50 on
the I2C bus
eCAN-A Boot Call CAN_Boot to load from eCAN-A mailbox 1.
Boot to M0 SARAM Jump to M0 SARAM address 0x00 0000.
Boot to OTP Jump to OTP address 0x3D 7800
Parallel I/O Boot Load data from GPIO0 - GPIO15
Copyright © 2003–2012, Texas Instruments Incorporated
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Table 3-7. Boot Mode Selection
DESCRIPTION
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TMS320F2809 TMS320F2808 TMS320F2806 TMS320F2802 TMS320F2801 TMS320C2802
TMS320C2801 TMS320F28016 TMS320F28015
TMS320F2809, TMS320F2808, TMS320F2806
TMS320F2802, TMS320F2801, TMS320C2802
TMS320C2801, TMS320F28016, TMS320F28015
SPRS230N – OCTOBER 2003 – REVISED MAY 2012
GPIO18
SPICLKA
SCITXDB
1
1
1
1
0
0
0
0
GPIO29
GPIO34
SCITXDA
1 1
1 0
0 1
0 0
1 1
1 0
0 1
0 0
Functional Overview 35