Analog Devices ADV7850 Hardware Manual page 140

Function
hpa_tristate_c
0 
1
hpa_tristate_d, IO, Address 0x20[0]
This control is used to tristate the HPA output pin for Port D.
Function
hpa_tristate_d
0 
1
hpa_status_port_a, IO, Address 0x21[3] (Read Only)
This readback displays the HPA status for Port A.
Function
hpa_status_port_a
0 
1
hpa_status_port_b, IO, Address 0x21[2] (Read Only)
This readback displays the HPA status for Port B.
Function
hpa_status_port_b
0 
1
hpa_status_port_c, IO, Address 0x21[1] (Read Only)
This readback displays the HPA status for Port C.
Function
hpa_status_port_c
0 
1
hpa_status_port_d, IO, Address 0x21[0] (Read Only)
This readback displays the HPA status for Port D.
Function
hpa_status_port_d
0 
1
hpa_ovr_term, Addr 68 (HDMI), Address 0x6C[3]
This control is used to set the termination control to be overridden by the HPA setting. When this bit is set, termination on a specific
port is set according to the HPA status of that port.
Rev. A May 2012
Description
HPA_C pin active
Tristate HPA_C pin
Description
HPA_D pin active
Tristate HPA_D pin
Description
+5 V not applied to HPA_A pin by chip
+5 V applied to HPA_A pin by chip
Description
+5 V not applied to HPA_B pin by chip
+5 V applied to HPA_B pin by chip
Description
+5 V not applied to HPA_C pin by chip
+5 V applied to HPA_C pin by chip
Description
+5 V not applied to HPA_D pin by chip
+5 V applied to HPA_D pin by chip
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ADV7850