Nonstandard Samples Per Line - Analog Devices Advantiv ADV7604 Hardware Manual

Important:
• For a nonstandard
additional ESDP registers need to be programmed, as outlined in Section
• The CP CSC is automatically enabled in ESDP mode (refer to Section 8.4.1) and configured
in automatic mode, as defined in Section 8.4.2.
• No conversion is performed in the DPP CSC when the part is set in ESDP mode. In that
mode, all the DPP CSC function is manual mode with all its coefficient set to 0.
ESDP_MODE, IO Map, Address 0x0F, [7]
Function
ESDP_MODE
0
1
CURRENT_CLAMP_EN , Current Clamp Control , IO Map, Address 0x30, [3]
Function
CURRENT_CLAM
P_EN
0
1

9.10 Nonstandard Samples per Line

ESDP is configured by default to operate at nominal number of samples per line (858 samples per
line for 480i/480p, 864 samples per line for 576i/576p). If it is desired to operate the ESDP in a mode
with a nonstandard number of samples per line, the following additional I²C registers must be
programmed:
•
PLL_DIV_RATIO
2/4 for 2x/4x over sampled modes respectively)
•
AV_WIDTH[11:0]
•
HS_WIDTH[11:0]
porch accumulation window position for digital clamping)
• Current source trigger point for current source clamping
• Additional settings provided by ADI on requests
Table 49 gives examples of various modes. Additional or custom modes can be provided on request.
Rev. F August 2010
PLL_DIV_RATIO[12:0]
Description
ESDP is bypassed.
ESDP is used to enhanced the synchronization separation
Description
Disable current clamping.
Enable current clamping
to set the desired number of ADC samples per line (must be a multiple of
to set the number of active pixels to output (between SAV and EAV)
to set the desired HSync width in pixels (synchronization tip and back
setting, for example, 910 instead of 858,
224
ADV7604
9.10.