Analog Devices Advantiv ADV7611 Hardware User's Manual page 135

Hardware User Guide
CH1_FR_LL[10:0] , Addr 44 (CP), Address 0x8F[2:0]; Address 0x90[7:0]
Free run line length in number of crystal clock cycles in one line of video for Sync Channel 1 STDI. This register should only be
programmed video standards that are not supported by PRIM_MODE[3:0] and VID_STD[5:0].
Function
CH1_FR_LL[10:0]
0x000 (default)
All other values
Notes
•
This parameter has no effect on the video decoding.
•
If CH1_FR_LL[10:0] is not programmed, then the free-run line length parameter is decoded from
VID_STD[5:0].
Vertical Conditions
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] control bits allow the
user to select the threshold for Channel 1. The ideal number of lines per field can be set manually via the CP_LCOUNT_MAX[11:0]
register.
CH1_FL_FR_THRESHOLD[2:0] , Addr 44 (CP), Address 0xF3[5:3]
Threshold for difference between input video field length and internally stored standard to enter and exit free run.
Function
CH1_FL_FR_THRESHOLD[2:0]
000
001
010 (default)
011
100
101
110
111
CP_LCOUNT_MAX[11:0] , Addr 44 (CP), Address 0xAB[7:0]; Address 0xAC[7:4]
Manual value for total number of lines in a frame expected by the CP core. CP_LCOUNT_MAX[11:0] is an unsigned value. This register
is used for manual configuration of the free run feature. The value programmed in this register is used for Sync Channel 1. The value
programmed in this register is used also for Sync Channel 2 if CH2_FR_FIELD_LENGTH[10:0] set to 0x000.
Function
CP_LCOUNT_MAX[11:0]
0x000 (default)
All other values
INTERLACED , Addr 44 (CP), Address 0x91[6]
Sets the interlaced/progressive mode of the incoming video processed in CP mode.
Function
INTERLACED
0
1 (default)
Description
Internal free run line length is decoded from PRIM_MODE[3:0] and VID_STD[5:0].
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 is 36 lines. Maximum difference to switch out of free run is
31 lines.
Minimum difference to switch into free run is 18 lines. Maximum difference to switch out of free run is
15 lines.
Minimum difference to switch into free run is 10 lines. Maximum difference to switch out of free run is
7 lines.
Minimum difference to switch into free run is 4 lines. Maximum difference to switch out of free run is
3 lines.
Minimum difference to switch into free run is 51 lines. Maximum difference to switch out of free run is
46 lines.
Minimum difference to switch into free run is 69 lines. Maximum difference to switch out of free run is
63 lines.
Minimum difference to switch into free run is 134 lines. Maximum difference to switch out of free run is
127 lines.
Minimum difference to switch into free run is 263 lines. Maximum difference to switch out of free run is
255 lines.
Description
Ideal number of lines per frame is decoded from PRIM_MODE[3:0] and VID_STD[5:0] for Sync Channel 1.
Use the programmed value as ideal number of lines per frame in free run decision for Sync Channel 1.
Description
The CP core expects progressive video mode.
the CP core expects interlaced video mode.
Rev. A | Page 135 of 184
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PRIM_MODE[3:0] and