Processor: 6211
CCS Version V2.0
Windows 2000
Emulator: XDS510PP Plus. 2002 make
I am using the crystal oscillaotr, 150 MHz
There are two CLKINs presented on processor, one is CLK/2 other is CLK/4, I was
measuring all the Input Pins of DSP Processor, where I found that ECLKIN signal
is absent. Also CLKIN/2 is not there. PLL Circuit and its components I tested,
they are ok, I am also providing the suggested power supplies to the components
as per the documents of TI.
I am getting the CLK/4 means 37.5MHz perfectly, But the CLK/2 is absent, also
there is no driving clock at the EMIF as ECLKIN is absent.
Should I assume that my processor gone bad?, as 15 days ago when I tested all
the signals, this particular signal ECLKIN was not there at that time too.
ECLKIN, CLKOUT1, CLKOUT2 related problem
Started by ●September 21, 2006
Reply by ●September 21, 20062006-09-21
Arunav-
> Processor: 6211
> CCS Version V2.0
> Windows 2000
> Emulator: XDS510PP Plus. 2002 make
>
> I am using the crystal oscillaotr, 150 MHz
> There are two CLKINs presented on processor, one is CLK/2 other is CLK/4,
> I was measuring all the Input Pins of DSP Processor, where I found that
> ECLKIN signal is absent. Also CLKIN/2 is not there. PLL Circuit and its
> components I tested, they are ok, I am also providing the suggested power
> supplies to the components as per the documents of TI.
>
> I am getting the CLK/4 means 37.5MHz perfectly, But the CLK/2 is absent,
> also there is no driving clock at the EMIF as ECLKIN is absent.
> Should I assume that my processor gone bad?, as 15 days ago when I tested
> all the signals, this particular signal ECLKIN was not there at that time
> too.
First check to make sure CLKOUT1, CLKOUT2, and CLKOUT3 signals are enabled in EMIF
control register bit settings.
Second it's possible that one pin can get zapped and the device otherwise still works
Ok. Pin killing examples include ESD, shorting the pin to gnd, measuring the pin
with the board powered-on with a volt-meter set to ohms, reversing pwr/gnd leads on
the dig scope, etc.
Also, you should carefully check the CLKOUT2 test-point on the PCB -- is it still
good? Is there another place you can get access, for example scrape off a bit of
solder mask on a via?
-Jeff
> Processor: 6211
> CCS Version V2.0
> Windows 2000
> Emulator: XDS510PP Plus. 2002 make
>
> I am using the crystal oscillaotr, 150 MHz
> There are two CLKINs presented on processor, one is CLK/2 other is CLK/4,
> I was measuring all the Input Pins of DSP Processor, where I found that
> ECLKIN signal is absent. Also CLKIN/2 is not there. PLL Circuit and its
> components I tested, they are ok, I am also providing the suggested power
> supplies to the components as per the documents of TI.
>
> I am getting the CLK/4 means 37.5MHz perfectly, But the CLK/2 is absent,
> also there is no driving clock at the EMIF as ECLKIN is absent.
> Should I assume that my processor gone bad?, as 15 days ago when I tested
> all the signals, this particular signal ECLKIN was not there at that time
> too.
First check to make sure CLKOUT1, CLKOUT2, and CLKOUT3 signals are enabled in EMIF
control register bit settings.
Second it's possible that one pin can get zapped and the device otherwise still works
Ok. Pin killing examples include ESD, shorting the pin to gnd, measuring the pin
with the board powered-on with a volt-meter set to ohms, reversing pwr/gnd leads on
the dig scope, etc.
Also, you should carefully check the CLKOUT2 test-point on the PCB -- is it still
good? Is there another place you can get access, for example scrape off a bit of
solder mask on a via?
-Jeff
