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AD8197 Datasheet(PDF) 23 Page - Analog Devices

Part No. AD8197
Description  4:1 HDMI/DVI Switch with Equalization
Download  32 Pages
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Manufacturer  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

AD8197 Datasheet(HTML) 23 Page - Analog Devices

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Preliminary Data Sheet
AD8197
PrA | Page 23 of 32
PARALLEL INTERFACE CONFIGURATION REGISTERS
The parallel interface configuration registers can be directly set using the PP_EN, PP_CH[1:0], PP_EQ, PP_PRE[1:0], PP_OTO, and
PP_OCL pins. This interface is only accessible after the part is reset and before any registers are accessed using the serial control interface.
The state of each pin is set by tying it to 3.3 V (Logic 1) or 0 V (Logic 0).
Table 24. Parallel Interface Register Map
Name
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
High speed
switch enable
High speed switching
mode select (quad)
High speed source select
High Speed
Device Modes
PP_EN
0
0
0
0
PP_CH[1]
PP_CH[0]
Auxiliary
switch enable
Auxiliary switching
mode select (quad)
Auxiliary switch source select
Auxiliary Device
Modes
1
0
0
0
0
PP_CH[1]
PP_CH[0]
Input term. on/off
select (termination
always on)
Receiver
Settings
1
Source A and Source B input termination pulse-on-source switch select (termination always on)
Input
Termination
Pulse 1
0
0
0
0
0
0
0
0
Source C and Source D input termination pulse-on-source switch select (termination always on)
Input
Termination
Pulse 2
0
0
0
0
0
0
0
0
Source A and Source B input equalization level select
Receive
Equalizer 1
PP_EQ
PP_EQ
PP_EQ
PP_EQ
PP_EQ
PP_EQ
PP_EQ
PP_EQ
Source C and Source D input equalization level select
Receive
Equalizer 2
PP_EQ
PP_EQ
PP_EQ
PP_EQ
PP_EQ
PP_EQ
PP_EQ
PP_EQ
Output pre-emphasis
level select
Output
termination
on/off select
Output current level
select
Transmitter
Settings
PP_PE[1]
PP_PE[0]
PP_OTO
PP_OCL
HIGH SPEED DEVICE MODES REGISTER
The high speed (TMDS) switching mode is fixed to quad mode
when using the parallel interface.
PP_EN: High Speed (TMDS) Channels Enable Bit
Table 25. PP_EN Description
PP_EN
Description
0
High speed channels off, low power/standby mode
1
High speed channels on
PP_CH[1:0]: High Speed (TMDS) Switch Source Select Bus
Table 26. Quad High speed Switch Mode Mapping
PP_CH[1:0]
O[3:0]
Description
00
A[3:0]
High Speed Source A switched to
output
01
B[3:0]
High Speed Source B switched to
output
10
C[3:0]
High Speed Source C switched to
output
11
D[3:0]
High Speed Source D switched to
output
AUXILIARY DEVICE MODES REGISTER
The auxiliary (low speed) switch is always enabled and the
auxiliary switching mode is fixed to quad mode when using the
parallel interface.
PP_CH[1:0]: Auxiliary Switch Source Select Bus
Table 27. Quad Auxiliary Switch Mode Mapping
PP_CH[1:0]
AUX_COM[3:0]
Description
00
AUX_A[3:0]
Auxiliary Source A switched to
output
01
AUX_B[3:0]0
Auxiliary Source B switched to
output
10
AUX_C[3:0]
Auxiliary Source C switched to
output
11
AUX_D[3:0]
Auxiliary Source D switched to
output


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