Lpc2000

Byte accesses on these 16-bit FLASH devices are not a problem! From 
what I can tell, you are most likely using an Intel 16-bit wide 
StrataFlash, or one of those Micron 16-bit wide, (very much like the 
Intel NOR-StrataFlash).

The issues are:
1.  You can do all reads as a 16-bit device, (just configure your 
BCFGn register properly for 16-bit bus
2.  To write bytes to this device, you just read the 16-bit value, 
modify the upper, or lower byte, and write the value back.
3.  From what I can tell, the only real reason you need to write to 
this device is to download the code...in this case, you do not need to 
concern yourself with byte accesses at all! Just do everything using 
unsigned short data types.
4.  If your BCFGn register is properly configured, your code will run 
just fine from the external FLASH device....provided you burned it 
properly.
5.  Don't forget to make sure your interrupt vectors are setup 
properly, otherwise nothing will work. This is one of the small 
caveats on using external FLASH for the LPC devices.

Ken Wada

--- In lpc2000@yahoogroups.com, "smoutpatrick" <sonpat@b...> wrote:
>
> 
> --- In lpc2000@yahoogroups.com, Tom Walsh <tom@o...> wrote:
> >
> > smoutpatrick wrote:
> > 
> > >Hi,
> > >
> > >What would be the consequences if my hardware design based on the 
> > >LPC2214 uses 16 bit flash devices that only supports 16 bit 
> accesses?
> > >Can I write bytes in the flash using the __packed type modifier?
> > >
> > >Thanks for the feedback,
> > >
> > >  
> > >
> > That would be solely dependant on your Flash. Look to your 
> datasheet on 
> > the Flash device.
> > 
> > TomW
> > 
> > -- 
> > Tom Walsh - WN3L - Embedded Systems Consultant
> > http://openhardware.net, http://cyberiansoftware.com
> > "Windows? No thanks, I have work to do..."
> > ----------------------------------------------------
> >
> Tom,
> 
> what should i look for in the datasheet?
> The datasheet tells me that no byte access is supported (see 
original 
> posting).
> My guess is that the compiler might help me but I'm not sure.
> 
> Patrick
>