In the ADV7842-VER.5.9c.txt script file, in Script 9 DVI, there is the following line:
4C 01 FE ; Power down ref buffer_bandgap_clamps_sync strippers_input mux_output buffer
This register is not documented in either the Software or Hardware guide. While removing this line seems to have no affect on DVI, leaving it in will cause VGA modes to fail afterwards (unless the part is reset).
Can you please explain what this register does and why it is set in the DVI script?