UG-707
ADV8005 Hardware Reference Manual
and
tx1_arc_bias_hyst_adj
, IO Map,
Address 0x1A88[1]
This bit is used to control the addition of hysteresis to the TX1 ARC.
Function
tx1_arc_bias_hyst_adj
Description
0 (default)
Normal
1
ADD hysteresis
tx2_arc_bias_hyst_adj
, IO Map,
Address 0x1A8A[1]
This bit is used to control the addition of hysteresis to the TX2 ARC.
Function
tx2_arc_bias_hyst_adj
Description
0 (default)
Normal
1
ADD hysteresis
6.15.
CHARGE INJECTION SETTINGS
The clock and data charge injection controls are used to tune the strength of an AC-coupled driver on the outputs from the
Tx. This
driver is used to boost the ramp rate on the output waveform, helping to open the eye particularly at higher transmission speeds. The charge
injection settings used in the
software driver are optimized for the evaluation board and may require
adjustment for end-user systems. The three data channels should be configured to the same value charge injection setting. The clock charge
injection value may require adjustment to a separate value to meet rise / fall time requirements.
chg_inj_ch0[3:0]
, TX2 Main Map,
Address 0xF481[7:4]
Binary control of charge injection for data channel 0 with LSB cap value of 77fF
chg_inj_ch1[3:0]
, TX2 Main Map,
Address 0xF481[3:0]
Binary control of charge injection for data channel 1 with LSB cap value of 77fF
chg_inj_ch2[3:0]
, TX2 Main Map,
Address 0xF482[7:4]
Binary control of charge injection for data channel 2 with LSB cap value of 77fF
chg_inj_clk[3:0]
, TX2 Main Map,
Address 0xF482[3:0]
Binary control of charge injection for clock channel with LSB cap value of 77fF
6.16.
ENABLING AND DISABLING THE HDMI TMDS OTUPUTS
The clock and data predriver controls are used to enable or disable the current switching outputs from the
HDMI Tx.
pre_en_ch0
, TX2 Main Map,
Address 0xF480[3]
Enable data channel 0
Function
pre_en_ch0
Description
1 (default)
Enabled 0 = Disabled
pre_en_ch1
, TX2 Main Map,
Address 0xF480[2]
Enable data channel 1
Function
pre_en_ch1
Description
1 (default)
Enabled 0 = Disabled
pre_en_ch2
, TX2 Main Map,
Address 0xF480[1]
Enable data channel 2
Function
pre_en_ch2
Description
1 (default)
Enabled 0 = Disabled
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