6
Q6:
Can the video input signal be mixed with information by alphablending?
Yes, for example it is possible to put text or graphics on the C-layer alphablended on top of the
video (on W-layer).
Q7:
There is a I2C interface implemented in Scarlet&Orchid.
On which pins is this interface located ?
The I2C pins of Scarlet are : 184 and 185
For details, see the I2C description of Scarlet !
Q8:
Scarlet requires 14,32MHz (4* NTSC) input clock.
Is it possible to use another crystal (e.g.14,25MHz) ?
What is the allowed range of deviation (PLL) ?
The 14.25MHz as input clock is OK.
The allowed range of output frequency of PLL is around 195..202kHz.
Q9:
What is the weight (in grams) of the final Scarlet chip (mass production version) ?
The typical weight of HQFP208 package is 5.17g.
Errors of plus or minus several percent will arise.
Q10:
Using SH-3 @ 66 Mhz together with Scarlet :
The "XRDY delay time" is specified with t(RDYD)=7ns (max). In the Hitachi SH3-spec there is a value
given for "Wait setup time" = 12ns (min) @ 66MHzoperation frequency. Under these worst case
conditions, the wait line could eventually cause problems. Did your customers had problems with that
? Do you have any recommendations ?
We've assumed the max. frequency of SH3 bus-clock as 50MHz. If customer use higher
frequency, they need to set the software wait to 3 cycle. We are now checking the behavior of
this setting by logic simulation.
Q11:
Is the load capacitance specified (C=16pF) valid for all ports of Scarlet ?
Yes, all the input load is same.
