Isn't that register already used to control the COM2 UART?
this is what I have for 0x22c00000:
#define TS7200_COM2_MODE 0x22C00000
// val 0x00 = RS-232
// val 0x01 = Full-Duplex RS-485
// val 0x02 = Reserved
// val 0x03 = Reserved
// val 0x04 = Half-Duplex 9600 baud
// val 0x05 = Half-Duplex 19.2K baud
// val 0x06 = Half-Duplex 57.6K baud
// val 0x07 = Half-Duplex 115.2K baud
-Curtis.
On March 2, 2006 11:15 am, Jesse Off wrote:
> Poke 16 bit value 0x2 (least 3 bits significant) to 0x22c00000
>
> //Jesse Off
>
> --- In Curtis Monroe <> wrote:
> >
> > Whats the location of this magic bit?
> >
> > -Curtis.
> >
> > On February 12, 2006 11:12 am, Jesse Off wrote:
> > > The real frequency is 14.3 Mhz, but the CPLD gets it by dropping every
> > > 32nd clock tick from 14.7456Mhz. This works, but its probably too
> > > high of a jitter to feed a PLL so there is a magic bit in a register
> > > that you can use to disable this behavior and get a clean 14.7456Mhz.
> > >
> > > //Jesse Off
> > >
> > >
> > > --- In Rich Wilson <richaw@> wrote:
> > > >
> > > > I'm doing some planning, but haven't purchased a TS-7250 yet, so
> > > > I can't measure this myself.
> > > >
> > > > The TS-7250 User's Manual page 26 shows the frequency of the
> > > > PC104 bus signal OSC to be 14.3 MHz.
> > > >
> > > > The TS-7250 schematic shows this pin to be connected to the
> > > > signal ISA_OSC, which apparently comes from U19, a Xilinx
> > > > CPLD. I see no other connection to this signal on the schematic.
> > > > The Xilinx clock input is 14.74 MHz.
> > > >
> > > > I'm highly suspicious that U19 is not capable of converting from
> > > > 14.74MHz to 14.3 MHz, and that there may be a documentation
> > > > error here somewhere. What's the real frequency of the ISA
> > > > OSC pin?
> > > >
> > > > Thanks.
> > > >
> > > > Rich
> > > > --
> > > > Rich Wilson
> > > > richaw@
> > > > 425-337-7129
> > > >
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > > Yahoo! Groups Links
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> >
>
>
>
>
>
>
>
> Yahoo! Groups Links
>
>
>
>
>
>
>
>
Yahoo! Groups Links
<*> To visit your group on the web, go to:
http://groups.yahoo.com/group/ts-7000/
<*> To unsubscribe from this group, send an email to:
<*> Your use of Yahoo! Groups is subject to:
http://docs.yahoo.com/info/terms/
|