adv7181c Analog Devices, Inc., adv7181c Datasheet - Page 15

• Manufacturer Part Number: adv7181c
• Description: 10-bit, Integrated, Multiformat Sdtv Video Decoder And Rgb Graphics Digitizer
• Manufacturer: Analog Devices, Inc.

On the ADV7181C, it is recommended to use the ADC mapping shown in Table 8.
Table 8. Recommended ADC Mapping
Mode
CVBS
YC/YC auto
Component YUV
Component YUV
SCART RGB
Graphics
RGB Mode
1
Table 9. Manual MUX Settings for All ADCs
ADC0_SW_SEL[3:0]
0001
0010
0100
0101
0110
1100
The analog input muxes of the ADV7181C must be controlled
directly. This is referred to as manual input muxing. The manual
muxing is activated by setting the ADC_SWITCH_MAN bit
(see Table 9). It affects only the analog switches in front of the
ADCs. INSEL, SDM_SEL, PRIM_MODE, and VID_STD still
have to be set so that the follow-on blocks process the video
data in the correct format.
Not every input pin can be routed to any ADC. There are
restrictions in the channel routing imposed by the analog
signal routing inside the IC. See Table 9 for an overview of
the routing capabilities inside the chip. The three mux
sections can be controlled by the reserved control signal
buses ADC0_SW[3:0]/ ADC1_SW[3:0]/ADC2_SW[3:0].
Configuration to format follow-on blocks in correct format.
ADC0
Connection
A
A
A
A
A
A
Required ADC Mapping
ADC0
Y = ADC0
C = ADC1
Y = ADC0
U = ADC2
V = ADC1
Y = ADC0
U = ADC2
V = ADC1
CBVS = ADC0
G = ADC1
B = ADC3
R = ADC2
G = ADC0
B = ADC2
R = ADC1
IN
IN
IN
IN
IN
IN
1
2
4
5
6
3
ADC1_SW_SEL[3:0]
0001
0010
0100
0101
0110
1100
AIN Channel
CVBS = A
Y = A
C = A
Y = A
U = A
V = A
Y = A
U = A
V = A
CVBS = A
G = A
B = A
R = A
G = A
B = A
R = A
IN
IN
IN
IN
IN
IN
IN
IN
IN
IN
IN
IN
IN
IN
ADC1
Connection
N/A
N/A
A
A
A
A
2
3
6
5
6
5
4
5
4
5
4
4
6
6
IN
IN
IN
IN
ADC_SWITCH_MAN to 1
4
5
6
3
IN
IN
1
2
Rev. 0 | Page 15 of 20
Core
SD
SD
SD
CP
SD
CP
ADC2_SW_SEL[3:0]
0001
0010
0100
0101
0110
1100
Table 9 explains the ADC mapping configuration for the
following:
•
•
•
•
•
Configuration
INSEL[3:0] = 0000
SDM_SEL[1:0] = 00
PRIM_MODE[3:0] = 0000
VID_STD[3:0] = 0010
INSEL[3:0] = 0000
SDM_SEL[1:0] = 11
PRIM_MODE[3:0] = 0000
VID_STD[3:0] = 0010
INSEL[3:0] = 1001
SDM_SEL[1:0] = 00
PRIM_MODE[3:0] = 0000
VID_STD[3:0] = 0010
INSEL[3:0] = 0000
SDM_SEL[1:0] = 00
PRIM_MODE[3:0] = 0000
VID_STD[3:0] = 1010
INSEL[3:0] = 0000
SDM_SEL[1:0] = 00
PRIM_MODE[3:0] = 0000
VID_STD[3:0] = 0010
INSEL[3:0] = 0000
SDM_SEL[1:0] = 00
PRIM_MODE[3:0] = 0001
VID_STD[3:0] = 1100
ADC_SWITCH_MAN, manual input muxing enable,
IO map, Address 0C[7]
ADC0_SW[3:0], ADC0 mux configuration, IO map,
Address 0D[3:0]
ADC1_SW[3:0], ADC1 mux configuration, IO map,
Address 0D[7:4]
ADC2_SW[3:0], ADC2 mux configuration, IO map,
Address 0E[3:0]
ADC3_SW[3:0], ADC3 mux configuration, IO map,
Address 0E[7:4]
1
ADC2
Connection
N/A
A
A
A
A
N/A
IN
IN
IN
IN
2
4
5
6
ADC3_SW_SEL[3:0]
0001
0010
0100
0101
0110
1100
ADV7181C
ADC3
Connection
N/A
N/A
A
N/A
N/A
N/A
IN
4