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I am using TMS320VC5509A processor. I am using a 4 Megabit(512K X 8 bit)
Flash memory- M25P40- for a specific application in the same board.This Flash
memory is SPI compatable. Is it possible to boot the processor from the same
memory using the "Serial (SPI) EPROM Boot (24-bit address) via McBSP0"
option?. 

Regards
Aravind

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Aravind-

> I am using TMS320VC5509A processor. I am using a 4 Megabit(512K X 8 bit)
> Flash memory- M25P40- for a specific
> application in the same board.This Flash memory is SPI compatable. Is it
> possible to boot the processor from the same
> memory using the "Serial (SPI) EPROM Boot (24-bit address) via
McBSP0"
> option?.

In the 5509A bootloader doc:

  http://focus.ti.com/lit/an/spra375f/spra375f.pdf

both 16-bit and 24-bit SPI EEPROM boot modes appear to be documented.  As long
as you use separate areas in the Flash
for boot code and for non-volatile storage, I think you should be Ok.  Maybe set
aside some number of sectors for boot
code, to make it easier to update the code.

-Jeff

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Yes, the C5509A will issue a read from address 000000 of the Flash  
using command 03.

The Bootloader format allows you to set a number of peripheral ports  
and then read several blocks of data.  The C5509A will be operating  
at crystal speed, without any clock multiplier, and the McBSP0 port  
will be operating with a CLKGDV of 243, so the read speed will be  
rather slow unless you use the peripheral settings feature to alter  
the clock speed.  So, with a 12 MHz crystal, that would be under 50  
kHz data clock.

Be sure to select the proper GPIO pins at boot time to choose between  
16-bit address and 24-bit address, because if you don't match your  
Flash, nothing much will happen.

Brian Willoughby
Sound Consulting
On Dec 1, 2009, at 02:58, a...@gmail.com wrote:

>  I am using TMS320VC5509A processor. I am using a 4 Megabit(512K X  
> 8 bit) Flash memory- M25P40- for a specific application in the same  
> board.This Flash memory is SPI compatable. Is it possible to boot  
> the processor from the same memory using the "Serial (SPI) EPROM  
> Boot (24-bit address) via McBSP0" option?.

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Hi,

I didn't use the C5509A but the  C550.
The boot software of C5500 include SPI  boot mode, but is not full compatible
with flash SPI timing
so we used GPIO_3 pin to drive CS of Flash.

based on : Using TMS320C5509 Bootloader  SPRA375A.pdf  page 11

      Flash
     5509
      Other 
     
           CE #
     1
          142
            GPIO4

           SO
     2
          135
             DR0

          WP #
     3
           ---
      
      10 kom => Vdd
     
          Vss
     4

          SI
     5
         131
             DX0

          SCK
     6
         134
            CLKX0

          HOLD #
     7
          ---
      
      10k om =>Vdd
     
          Vdd
     8

GPIO                       7                    6                5              
      4                   3                        2                1           
     0

      ( BGA )
     Flash #CE
     Boot 0
     Boot 3
     Boot 2
     Boot 1

                6                   141             C5509 pin number       142  
                143                  9                 10                   12

serial EEPROM 24 bit address bootload                                0          
          0                      0                    1
Jerzy

Aravind-

> I am using TMS320VC5509A processor. I am using a 4 Megabit(512K X 8 bit)
> Flash memory- M25P40- for a specific
> application in the same board.This Flash memory is SPI compatable. Is it
> possible to boot the processor from the same
> memory using the "Serial (SPI) EPROM Boot (24-bit address) via
McBSP0"
> option?.

In the 5509A bootloader doc:

http://focus.ti.com/lit/an/spra375f/spra375f.pdf

both 16-bit and 24-bit SPI EEPROM boot modes appear to be documented. As long as
you use separate areas in the Flash
for boot code and for non-volatile storage, I think you should be Ok. Maybe set
aside some number of sectors for boot
code, to make it easier to update the code.

-Jeff

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Hi,

There are two ways to speed up the boot loading.

One way is to write a small boot loader that loads quickly, using this 
boot loader you can do some house keeping and then reassign the CLKGDV 
and Multiplier and then load the main code with a home made boot loader.

The other way is to use the function built into the 5500's boot loader 
where you can write specific memory locations, there is provision to 
include a few memory writes, the bootloader documentation covers this 
subject.

Sound Consulting wrote:
>
> Yes, the C5509A will issue a read from address 000000 of the Flash
> using command 03.
>
> The Bootloader format allows you to set a number of peripheral ports
> and then read several blocks of data. The C5509A will be operating
> at crystal speed, without any clock multiplier, and the McBSP0 port
> will be operating with a CLKGDV of 243, so the read speed will be
> rather slow unless you use the peripheral settings feature to alter
> the clock speed. So, with a 12 MHz crystal, that would be under 50
> kHz data clock.
>
> Be sure to select the proper GPIO pins at boot time to choose between
> 16-bit address and 24-bit address, because if you don't match your
> Flash, nothing much will happen.
>
> Brian Willoughby
> Sound Consulting
>
> On Dec 1, 2009, at 02:58, a...@gmail.com 
> <mailto:aravindcr%40gmail.com> wrote:
>
> > I am using TMS320VC5509A processor. I am using a 4 Megabit(512K X
> > 8 bit) Flash memory- M25P40- for a specific application in the same
> > board.This Flash memory is SPI compatable. Is it possible to boot
> > the processor from the same memory using the "Serial (SPI) EPROM
> > Boot (24-bit address) via McBSP0" option?.

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