Lpc2000

I want to use the LPC2210 with an external page mode flash S29GL032.
The LPC2210 has to boot from this device so the value of the BOOT0 and
BOOT1 pins is important (P2.26 and P2.27).  

Page 93 of the user manual (Rev. 01) contains the description for
PINSEL2[5:4].  The table shows me that BOOT1 should be 0 and BOOT1
should be 1 to have access to OE, D15:0 and CS0.  

The problem is the PINSEL2[24] bit (CTRLP301 on page 94):  according to
the explanation for CTRLP301, the I/O pin P3.1 starts as an GPOI pin if
BOOT1 is 0.  P3.1 is also A1 and A1 is needed to fetch from the flash.
So, with BOOT1 set to 0 during power-on, you don't have A1 available.
And without A1 is it hard to read from the 16 bit wide FLASH.

How can I solve this? Or is there a mistake in my interpretation?

The manual also states that with BOOT1:0 set to 11, booting from 16 bit
memory with CS0 is possible (page 84).  But the table on page 93
indicates that with BOOT1:0 set to 11, the pin P1.0 works as GPOI pin
and not as CS0 pin.  That makes it hard to boot with CS0.
There is something here that I don't understand... or there is something
wrong in the manual.

Regards,

Pieter Verstraelen





[Non-text portions of this message have been removed]

I have not worked with LPC2210/LPC2220 but i have worked with LPC2292 
and readed other controllers for using external memory interface from phillips
 
        The thing i want to tell u is for 
   BOOT1:0 selects one of the following options:
 - 00 selects 8-bit memory on CS0 for boot.
 - 01 selects 16-bit memory on CS0 for boot.
 - 10 selects 32-bit memory on CS0 for boot.
 - 11 selects 16-bit memory on CS0 for boot.   
   LAST OPTION IS ONLY TRUE IF UR CONTROLLER HAVE IN BILD FLASH
 [ Does u rcontroller have ? ]
  1. Boot 1 and Boot 0 were internally pull up 
 so by default they are in Mode 11 [last one] 
 which use internal FLASH of controller if present
 while booting up at the time of reset.
          i.e        BOOT 1:0   --   11
   In other three mode controller will over look the internal 
 flash.  
  2.      To Boot with an outer 32 bit memory 
        Connect a 10K res. permanently
 Between BOOT0 and GND,So it make the desired configration 
          i.e        BOOT 1:0   --   10
  3.      To Boot with an outer 16 bit memory 
        Connect a 10K res. permanently 
 Between BOOT1 and GND,So it make the desired configration 
        i.e        BOOT 1:0   --   01
  4.      To Boot with an outer 8 bit memory 
        Connect a 10K res. permanently 
 Between BOOT1 and GND + BOOT0 and GND,
 So it make the desired configration 
        
 i.e        BOOT 1:0   --   00
   The choice of 10K is to make a week pull down so that 
 these pins can be used for their respective functionality, otherwise.
  
        The main point that u might have over looked is that 
 these conditions are necessary only at the time of reset
    after that u dont need them.
 
 AND u r thinking from a software part of view because u are 
 looking at the internal reg. rather then looking for some schematics
     If u r looking to design a LPC hardware the best way or the quickest 
  way is to look for a development board as per ur requirement 
 [quit easy to find] then look for it sch. and study it.
 Then go for the user manual is u have a dought.     
  
        NOW i have a question in my mind how will i load the program the external 
 flash ?
 Any idea other then IAP.
   
  tell me if u find the sollution.even a blank mail with "i got sollution"
   
  vaibhav chauhan

elen <pieter@...> wrote:
  I want to use the LPC2210 with an external page mode flash S29GL032.
The LPC2210 has to boot from this device so the value of the BOOT0 and
BOOT1 pins is important (P2.26 and P2.27).  

Page 93 of the user manual (Rev. 01) contains the description for
PINSEL2[5:4].  The table shows me that BOOT1 should be 0 and BOOT1
should be 1 to have access to OE, D15:0 and CS0.  

The problem is the PINSEL2[24] bit (CTRLP301 on page 94):  according to
the explanation for CTRLP301, the I/O pin P3.1 starts as an GPOI pin if
BOOT1 is 0.  P3.1 is also A1 and A1 is needed to fetch from the flash.
So, with BOOT1 set to 0 during power-on, you don't have A1 available.
And without A1 is it hard to read from the 16 bit wide FLASH.

How can I solve this? Or is there a mistake in my interpretation?

The manual also states that with BOOT1:0 set to 11, booting from 16 bit
memory with CS0 is possible (page 84).  But the table on page 93
indicates that with BOOT1:0 set to 11, the pin P1.0 works as GPOI pin
and not as CS0 pin.  That makes it hard to boot with CS0.
There is something here that I don't understand... or there is something
wrong in the manual.

Regards,

Pieter Verstraelen





[Non-text portions of this message have been removed]



  SPONSORED LINKS 
        Microprocessor   Microcontrollers   Pic microcontrollers     8051 microprocessor 
    
---------------------------------
  YAHOO! GROUPS LINKS 

    
    Visit your group "lpc2000" on the web.
    
    To unsubscribe from this group, send an email to:
 lpc2000-unsubscribe@yahoogroups.com
    
    Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service. 

    
---------------------------------
  

  


Send instant messages to your online friends http://in.messenger.yahoo.com 

[Non-text portions of this message have been removed]

The LPC2210 does not have internal flash.  So, the 11 option for the
BOOT 1:0 pins is not a good idea probably.  

I want to boot from an external 16 bit FLASH and have to connect BOOT1
with a 10K resistor to GND. That is clear.

My only doubt is about address line A1.  The description of CTRLP301 on
page 94 of the user manual states that the pin with A1 is in GPIO mode
after reset if BOOT1 is zero during reset.  But I need A1 to fetch code
from the flash...

Regards,
Pieter Verstraelen

> -----Oorspronkelijk bericht-----
> Van: lpc2000@yahoogroups.com [mailto:lpc2000@yahoogroups.com] Namens
> vaibhav chauhan
> Verzonden: zaterdag 17 december 2005 13:42
> Aan: lpc2000@yahoogroups.com
> Onderwerp: Re: [lpc2000] LPC2210 boot configuration question
> 
> I have not worked with LPC2210/LPC2220 but i have worked with LPC2292
> and readed other controllers for using external memory interface from
> phillips
> 
>         The thing i want to tell u is for
>    BOOT1:0 selects one of the following options:
>  - 00 selects 8-bit memory on CS0 for boot.
>  - 01 selects 16-bit memory on CS0 for boot.
>  - 10 selects 32-bit memory on CS0 for boot.
>  - 11 selects 16-bit memory on CS0 for boot.
>    LAST OPTION IS ONLY TRUE IF UR CONTROLLER HAVE IN BILD FLASH
>  [ Does u rcontroller have ? ]
>   1. Boot 1 and Boot 0 were internally pull up
>  so by default they are in Mode 11 [last one]
>  which use internal FLASH of controller if present
>  while booting up at the time of reset.
>           i.e        BOOT 1:0   --   11
>    In other three mode controller will over look the internal
>  flash.
>   2.      To Boot with an outer 32 bit memory
>         Connect a 10K res. permanently
>  Between BOOT0 and GND,So it make the desired configration
>           i.e        BOOT 1:0   --   10
>   3.      To Boot with an outer 16 bit memory
>         Connect a 10K res. permanently
>  Between BOOT1 and GND,So it make the desired configration
>         i.e        BOOT 1:0   --   01
>   4.      To Boot with an outer 8 bit memory
>         Connect a 10K res. permanently
>  Between BOOT1 and GND + BOOT0 and GND,
>  So it make the desired configration
> 
>  i.e        BOOT 1:0   --   00
>    The choice of 10K is to make a week pull down so that
>  these pins can be used for their respective functionality, otherwise.
> 
>         The main point that u might have over looked is that
>  these conditions are necessary only at the time of reset
>     after that u dont need them.
> 
>  AND u r thinking from a software part of view because u are
>  looking at the internal reg. rather then looking for some schematics
>      If u r looking to design a LPC hardware the best way or the
quickest
>   way is to look for a development board as per ur requirement
>  [quit easy to find] then look for it sch. and study it.
>  Then go for the user manual is u have a dought.
> 
>         NOW i have a question in my mind how will i load the program
the
> external
>  flash ?
>  Any idea other then IAP.
> 
>   tell me if u find the sollution.even a blank mail with "i got
sollution"

> 
>   vaibhav chauhan
>

I Have downloaded this datasheet from phillips website
   
  http://www.semiconductors.philips.com/acrobat/datasheets/LPC2210_2220_2.pdf
   
  and after looking through table 9 on page 22 of 49 
  It says 
  Controls  P3.0/A0 is 
    An Address Line [1]                                 0 

  a Port Pin[0]                                            1 if Boot1:0 == 00
                                                                   At Reset = 0
   with a bar or line over reset that says it is a active low signal
   
  And samely  for 
   
    P3.1/A1 is 
    An Address Line [1]       for                       0 

  a Port Pin[0]                  for                      1 
   
  Boot 1 during reset with a bar or line over Boot 1 [U will find it clearly]
  That says it is a active low signal and give a value 1 for a low [0] signal at this pin at the time of reset = 0
   
  and Boot1 is active low only for bir no 24 of  PIN FUNCTION SELECT REG 2 [PFSR2] ie it will give 1 for bit 24 of PFSR 2  a 0 on pin BOOT1
   
  so u will get 1 at   Pin function select register 2 's  Bit No 24 and now u got ur A1 Pin for fatching code from flash

   
  Anything more i can do for u ?
  As I m learning from the questions u r asking.
   
  Because Neither Do i have seen this thing in such a detail Previously before u have asked the LPC group about it.I have just gone through the main External Memory Controller Module 3 given in LPC21XX-22XX User manual. And the board which i have developed was working.
  But Now i know the reason why these phillips people have develop the logic of these two pin 
  BOOT1:0.
   
   
  THANKS 
  learner... 
  vaibhav chauhan. 
   
   


     
  
Pieter Verstraelen <pieter@...> wrote:

    The LPC2210 does not have internal flash.  So, the 11 option for the
BOOT 1:0 pins is not a good idea probably.  

I want to boot from an external 16 bit FLASH and have to connect BOOT1
with a 10K resistor to GND. That is clear.

My only doubt is about address line A1.  The description of CTRLP301 on
page 94 of the user manual states that the pin with A1 is in GPIO mode
after reset if BOOT1 is zero during reset.  But I need A1 to fetch code
from the flash...

Regards,
Pieter Verstraelen

> -----Oorspronkelijk bericht-----
> Van: lpc2000@yahoogroups.com [mailto:lpc2000@yahoogroups.com] Namens
> vaibhav chauhan
> Verzonden: zaterdag 17 december 2005 13:42
> Aan: lpc2000@yahoogroups.com
> Onderwerp: Re: [lpc2000] LPC2210 boot configuration question
> 
> I have not worked with LPC2210/LPC2220 but i have worked with LPC2292
> and readed other controllers for using external memory interface from
> phillips
> 
>         The thing i want to tell u is for
>    BOOT1:0 selects one of the following options:
>  - 00 selects 8-bit memory on CS0 for boot.
>  - 01 selects 16-bit memory on CS0 for boot.
>  - 10 selects 32-bit memory on CS0 for boot.
>  - 11 selects 16-bit memory on CS0 for boot.
>    LAST OPTION IS ONLY TRUE IF UR CONTROLLER HAVE IN BILD FLASH
>  [ Does u rcontroller have ? ]
>   1. Boot 1 and Boot 0 were internally pull up
>  so by default they are in Mode 11 [last one]
>  which use internal FLASH of controller if present
>  while booting up at the time of reset.
>           i.e        BOOT 1:0   --   11
>    In other three mode controller will over look the internal
>  flash.
>   2.      To Boot with an outer 32 bit memory
>         Connect a 10K res. permanently
>  Between BOOT0 and GND,So it make the desired configration
>           i.e        BOOT 1:0   --   10
>   3.      To Boot with an outer 16 bit memory
>         Connect a 10K res. permanently
>  Between BOOT1 and GND,So it make the desired configration
>         i.e        BOOT 1:0   --   01
>   4.      To Boot with an outer 8 bit memory
>         Connect a 10K res. permanently
>  Between BOOT1 and GND + BOOT0 and GND,
>  So it make the desired configration
> 
>  i.e        BOOT 1:0   --   00
>    The choice of 10K is to make a week pull down so that
>  these pins can be used for their respective functionality, otherwise.
> 
>         The main point that u might have over looked is that
>  these conditions are necessary only at the time of reset
>     after that u dont need them.
> 
>  AND u r thinking from a software part of view because u are
>  looking at the internal reg. rather then looking for some schematics
>      If u r looking to design a LPC hardware the best way or the
quickest
>   way is to look for a development board as per ur requirement
>  [quit easy to find] then look for it sch. and study it.
>  Then go for the user manual is u have a dought.
> 
>         NOW i have a question in my mind how will i load the program
the
> external
>  flash ?
>  Any idea other then IAP.
> 
>   tell me if u find the sollution.even a blank mail with "i got
sollution"
> 
>   vaibhav chauhan
> 



  SPONSORED LINKS 
        Microprocessor   Microcontrollers   Pic microcontrollers     8051 microprocessor 
    
---------------------------------
  YAHOO! GROUPS LINKS 

    
    Visit your group "lpc2000" on the web.
    
    To unsubscribe from this group, send an email to:
 lpc2000-unsubscribe@yahoogroups.com
    
    Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service. 

    
---------------------------------
  




Send instant messages to your online friends http://in.messenger.yahoo.com 

[Non-text portions of this message have been removed]