Analog Devices ADV7610 Hardware User's Manual page 104

UG-438
CLMP_FREEZE, Addr 44 (CP), Address 0x6C[5]
Stops the digital fine clamp loops for Channel A, Channel B, and Channel C from updating.
Function
CLMP_FREEZE Description
0 (default) Clamp value updated on every active video line
1 Clamp loops are stopped and not updated
CLMP_A_MAN, Addr 44 (CP), Address 0x6C[7]
Manual clamping enable for Channel A.
Function
CLMP_A_MAN Description
0 (default) Ignore internal digital fine clamp loop result. Use CLMP_A[11:0].
1 Use the digital fine clamp value determined by the on-chip clamp loop.
CLMP_A[11:0], Addr 44 (CP), Address 0x6C[3:0]; Address 0x6D[7:0]
Manual clamp value for Channel A. This field is an unsigned 12-bit value to be subtracted from the incoming video signal. This value
programmed in this register is effective if the CLMP_A_MAN is set to 1. To change the CLMP_A[11:0], Register Address 0x6C and
Register Address 0x6D must be updated with the desired clamp value written to in this order and with no other I
Function
CLMP_A[11:0] Description
0x000 (default) Minimum range
... ...
0xFFF Maximum range
To facilitate an external clamp loop for Channel B and Channel C, the internal clamp value determined by the digital fine clamp block can
be overridden by manual values programmed in the CP map. Both Channel B and Channel C are either in manual or automatic mode.
There is no individual control for them.
The corresponding control values are CLMP_BC_MAN, CLMP_B[11:0], CLMP_C[11:0].
CLMP_BC_MAN, Addr 44 (CP), Address 0x6C[6]
Manual clamping enable for Channel B and Channel C.
Function
CLMP_BC_MAN Description
0 (default) Ignore internal digital fine clamp loop result. Use CLMP_B[11:0] for Channel B and CLMP_C[11:0] for Channel C.
1 Use the digital fine clamp value determined by the on-chip clamp loop.
CLMP_B[11:0], Addr 44 (CP), Address 0x6E[7:0]; Address 0x6F[7:4]
Manual clamp value for Channel B. This field is an unsigned 12-bit value to be subtracted from the incoming video signal. This value
programmed in this register is effective if the CLMP_BC_MAN is set to 1. To change the CLMP_B[11:0], Register Address 0x6E and
Register Address 0x6F must be updated with the desired clamp value written to in this order and with no other I
Function
CLMP_B[11:0] Description
0x000 (default) Minimum range
... ...
0xFFF Maximum range
Rev. 0 | Page 104 of 184
Hardware User Guide
2 C access in between.
C access in between.
2