DDR2 VHDL model

A

ALuPin@web.de

Guest
Hi,

on the following link

http://www.samsung.com/products/semiconductor/DDR_DDR2/DDR2SDRAM/Component/256Mbit/K4T56083QF/K4T56083QF.htm#ge

there are DDR2 memory VHDL simulation models from Samsung available.

But the compressed download files only contain .dat files.
Are these files suitable for functional simulations ?
I have always simulated with "real" vhdl models ...

Rgds
André
 
ALuPin@web.de wrote:
Hi,

on the following link

http://www.samsung.com/products/semiconductor/DDR_DDR2/DDR2SDRAM/Component/256Mbit/K4T56083QF/K4T56083QF.htm#ge

there are DDR2 memory VHDL simulation models from Samsung available.

But the compressed download files only contain .dat files.
Are these files suitable for functional simulations ?
I have always simulated with "real" vhdl models ...
These are precompiled models and only work in the corresponding
Click to expand...
simulator. I.e., if it says the model is for ModelSim SunOS, chances are
it only works when you simulate in ModelSim SunOS.

But Samsung is pretty cooperative if you ask them to supply precimpiled
models for let's say ModelSim 6.2 Windows. They'll make models for you,
but they won't supply you with the source code.

I've mostly used Verilog-models from Micron, which are very good.
Fortunately, I never had to change anything in them, so my lack of
Verilog-knowledge didn't hurt.

cu,
Sean

--
My email address is only valid until the end of the month.
Go figure what the address is going to be after that...
 
Sean Durkin a écrit :


ALuPin@web.de wrote:
Hi,

on the following link

http://www.samsung.com/products/semiconductor/DDR_DDR2/DDR2SDRAM/Component/256Mbit/K4T56083QF/K4T56083QF.htm#ge

there are DDR2 memory VHDL simulation models from Samsung available.

But the compressed download files only contain .dat files.
Are these files suitable for functional simulations ?
I have always simulated with "real" vhdl models ...
[...]
I've mostly used Verilog-models from Micron, which are very good.
Fortunately, I never had to change anything in them, so my lack of
Verilog-knowledge didn't hurt.
Click to expand...
I am currently working with a DDR2 VHDL model from Hynix (but I don't
have the slightest cue about where it was downloaded)


Nicolas
 
Andre,

Free Model Foundry (http://www.freemodelfoundry.com) has 2 DDR2 models.
Just type DDR2 into the search window.

Rick


ALuPin@web.de wrote:
Hi,

on the following link

http://www.samsung.com/products/semiconductor/DDR_DDR2/DDR2SDRAM/Component/256Mbit/K4T56083QF/K4T56083QF.htm#ge

there are DDR2 memory VHDL simulation models from Samsung available.

But the compressed download files only contain .dat files.
Are these files suitable for functional simulations ?
I have always simulated with "real" vhdl models ...

Rgds
André
Click to expand...
 
Hi Rick,

I have compiled the Micron model "mt47h64m16.vhd" and get the following
warnings (ModelSim Lattice 6.2c) :


# ** Warning:
R:/EDA/DDR2Controller/FreeModelFoundry_DDR2Model/mt47h64m16.vhd(796):
(vcom-1236) Shared variables must be of a protected type.
# ** Warning:
R:/EDA/DDR2Controller/FreeModelFoundry_DDR2Model/mt47h64m16.vhd(797):
(vcom-1236) Shared variables must be of a protected type.
# ** Warning:
R:/EDA/DDR2Controller/FreeModelFoundry_DDR2Model/mt47h64m16.vhd(800):
(vcom-1236) Shared variables must be of a protected type.
# ** Warning:
R:/EDA/DDR2Controller/FreeModelFoundry_DDR2Model/mt47h64m16.vhd(801):
(vcom-1236) Shared variables must be of a protected type.
# ** Warning:
R:/EDA/DDR2Controller/FreeModelFoundry_DDR2Model/mt47h64m16.vhd(802):
(vcom-1236) Shared variables must be of a protected type.
# ** Warning:
R:/EDA/DDR2Controller/FreeModelFoundry_DDR2Model/mt47h64m16.vhd(803):
(vcom-1236) Shared variables must be of a protected type.
# ** Warning:
R:/EDA/DDR2Controller/FreeModelFoundry_DDR2Model/mt47h64m16.vhd(805):
(vcom-1236) Shared variables must be of a protected type.
# ** Warning:
R:/EDA/DDR2Controller/FreeModelFoundry_DDR2Model/mt47h64m16.vhd(807):
(vcom-1236) Shared variables must be of a protected type.
# ** Warning:
R:/EDA/DDR2Controller/FreeModelFoundry_DDR2Model/mt47h64m16.vhd(811):
(vcom-1236) Shared variables must be of a protected type.
# ** Warning:
R:/EDA/DDR2Controller/FreeModelFoundry_DDR2Model/mt47h64m16.vhd(812):
(vcom-1236) Shared variables must be of a protected type.
# ** Warning:
R:/EDA/DDR2Controller/FreeModelFoundry_DDR2Model/mt47h64m16.vhd(813):
(vcom-1236) Shared variables must be of a protected type.
# ** Warning:
R:/EDA/DDR2Controller/FreeModelFoundry_DDR2Model/mt47h64m16.vhd(816):
(vcom-1236) Shared variables must be of a protected type.
# ** Warning:
R:/EDA/DDR2Controller/FreeModelFoundry_DDR2Model/mt47h64m16.vhd(817):
(vcom-1236) Shared variables must be of a protected type.
# ** Warning:
R:/EDA/DDR2Controller/FreeModelFoundry_DDR2Model/mt47h64m16.vhd(818):
(vcom-1236) Shared variables must be of a protected type.
# ** Warning:
R:/EDA/DDR2Controller/FreeModelFoundry_DDR2Model/mt47h64m16.vhd(824):
(vcom-1236) Shared variables must be of a protected type.
# ** Warning:
R:/EDA/DDR2Controller/FreeModelFoundry_DDR2Model/mt47h64m16.vhd(827):
(vcom-1236) Shared variables must be of a protected type.
# ** Warning:
R:/EDA/DDR2Controller/FreeModelFoundry_DDR2Model/mt47h64m16.vhd(835):
(vcom-1236) Shared variables must be of a protected type.
# ** Warning:
R:/EDA/DDR2Controller/FreeModelFoundry_DDR2Model/mt47h64m16.vhd(841):
(vcom-1236) Shared variables must be of a protected type.
# ** Warning:
R:/EDA/DDR2Controller/FreeModelFoundry_DDR2Model/mt47h64m16.vhd(842):
(vcom-1236) Shared variables must be of a protected type.
# ** Warning:
R:/EDA/DDR2Controller/FreeModelFoundry_DDR2Model/mt47h64m16.vhd(848):
(vcom-1236) Shared variables must be of a protected type.
# ** Warning:
R:/EDA/DDR2Controller/FreeModelFoundry_DDR2Model/mt47h64m16.vhd(849):
(vcom-1236) Shared variables must be of a protected type.
# ** Warning:
R:/EDA/DDR2Controller/FreeModelFoundry_DDR2Model/mt47h64m16.vhd(851):
(vcom-1236) Shared variables must be of a protected type.
# ** Warning:
R:/EDA/DDR2Controller/FreeModelFoundry_DDR2Model/mt47h64m16.vhd(854):
(vcom-1236) Shared variables must be of a protected type.
# ** Warning:
R:/EDA/DDR2Controller/FreeModelFoundry_DDR2Model/mt47h64m16.vhd(859):
(vcom-1236) Shared variables must be of a protected type.
# ** Warning:
R:/EDA/DDR2Controller/FreeModelFoundry_DDR2Model/mt47h64m16.vhd(863):
(vcom-1236) Shared variables must be of a protected type.

Is there any conflict with that warnings ?
Rgds
Andre

Andre,

Free Model Foundry (http://www.freemodelfoundry.com) has 2 DDR2 models.
Just type DDR2 into the search window.

Rick
Click to expand...
 
On 3 Jan 2007 03:10:05 -0800,
<ALuPin@web.de> wrote:

I have compiled the Micron model "mt47h64m16.vhd" and get the following
warnings (ModelSim Lattice 6.2c) :

# ** Warning:
R:/EDA/DDR2Controller/FreeModelFoundry_DDR2Model/mt47h64m16.vhd(796):
(vcom-1236) Shared variables must be of a protected type.

Is there any conflict with that warnings ?
Click to expand...
Try setting your ModelSim compile for VHDL-93 mode (vcom -93 ...)
Protected types were introduced for VHDL-2002, which is
probably your default setting.
--
Jonathan Bromley, Consultant

DOULOS - Developing Design Know-how
VHDL * Verilog * SystemC * e * Perl * Tcl/Tk * Project Services

Doulos Ltd., 22 Market Place, Ringwood, BH24 1AW, UK
jonathan.bromley@MYCOMPANY.com
http://www.MYCOMPANY.com

The contents of this message may contain personal views which
are not the views of Doulos Ltd., unless specifically stated.
 
any conflict with that warnings ?
Try setting your ModelSim compile for VHDL-93 mode (vcom -93 ...)
Protected types were introduced for VHDL-2002, which is
probably your default setting.
--
Jonathan Bromley, Consultant
Click to expand...
Hi Jonathan,

yes, the default setting is VHDL.2002, changing it to VHDL-93
removes the warnings.

Most models seems not to be written for VHDL-2002 yet ...

Rgds
Andre
 
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