Analog Devices Advantiv ADV7604 Hardware Manual page 301

CH1_FR_LL[10:0], CH1 Free-run Line Length , CP Map, Address 0x8F [2:0],
Address 0x90 [7:0]
CH2_FR_LL[10:0], CH2 Free-run Line Length, CP Map, Address 0x47 [2:0],
Address 0x48 [7:0]
Free-run Line Length is the horizontal parameter that holds the ideal line length for a given video
standard. It affects the way CP handles the unlocked state. If set to 0, the internally stored free run
line length value is used. This value is decoded from the current setting of
VID_STD[5:0]. For standards not covered by the preprogrammed values, the Free-run Line Length
parameter must be set to the ideally expected length of one line of input video.
Function
CH1_FR_LL[10:0]
CH2_FR_LL[10:0]
00 00000000
B
All other values
Notes:
• This parameter has no effect on the video decoding.
• If neither CH1_FR_LL[10:0] nor CH2_FR_LL[10:0] are programmed, then the Free-run
Line Length parameter is decoded from
• If CH1_FR_LL[10:0] is programmed and CH2_FR_LL[10:0] is not, the Free-run Line
Length parameter defined by CH1_FR_LL[10:0], is used for both channels.
CH1_FL_FR_THRESHOLD[1:0] Field Length Free Run Threshold Select , CP Map, Address
0xF3, [5:3]
CH2_FL_FR_THRESHOLD[1:0] Field Length Free Run Threshold Select , CP Map, Address
0x43, [5:3]
In the case of the vertical conditions, the STDI section measures the number of lines per field of
incoming video signal. This value is compared with an internally stored vertical parameter, the ideal
Field Length. The CH1_FL_FR_THRESHOLD[1:0] and CH2_FL_FR_THRESHOLD[1:0] control
bits allow the user to select the threshold for channel 1 and channel 2 respectively. The ideal number
of lines per field can be set manually via the CP_LCOUNT_MAX[11:0] register.
Function
CH1_FL_FR_
THRESHOLD[1:0]/
CH2_FL_FR_
THRESHOLD[1:0]
000
001
010
011
100
Rev. F August 2010
Description
Actually used internal free run line length is decoded from
PRIM_MODE[3:0] and
Number of crystal clocks in the ideal line length. Used to enter or exit
free run mode.
Description
Minimum Difference to Switch
into Free Run
36 lines
18 lines
10 lines
4 lines
51 lines
VID_STD[5:0].
PRIM_MODE[3:] and VID_STD[5:0].
Maximum Error to Switch out of
Free Run
31 lines
15 lines
7 lines
3 lines
46 lines
301
ADV7604
PRIM_MODE[3:0] and