VC0736 datasheet(25/127 Pages) NEXTCHIP

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NVP6124

Data sheet

02.11.2015 (REV 0.2)

23/125

4-CH AHD2.0 RX and 9-CH Audio Codec

5. FPGA or equivalent devices which is input 148.5MHz time multiplexed data output, need to align

with same channel data(37.125MHz 1,2,3,4 channel). Figure2.16. shows how to use Channel ID as a

example.

odd field

even field

vertical active

vertical blank

horizontal blank

horizontal active

EAV

SAV

CHID_TYPE

(0x54[2:0],BANK0 = 0x1)

0xD0

0xC0

CHID_VIN1 (0x55[3:0],BANK0 = 0x0)

EAV

SAV

0xD1

0xC1

CHID_VIN2 (0x55[7:4],BANK0 = 0x1)

EAV

SAV

0xD2

0xC2

CHID_VIN3 (0x56[3:0],BANK0 = 0x2)

EAV

SAV

0xD3

0xC3

CHID_VIN4 (0x56[7:4],BANK0 = 0x3)

CH4

CH1

CH2

CH4

CH1

CH2

CH4

CH1

CH2

CH4

CH1

CH2

CH3

CH4

CH1

CH2

CH3

CH4

CH1

CH2

CH1

CH3

Counter

Change!!

CH4

CH2

CH1

CH3

CH2

CH4

Detect(ff,00,00) &

EAV/SAV check

Wrong sorting

Right sorting

1 CH : 37.125MHz output

NVP6124 : 148.5MHz output

NVP6124 : 148.5MHz clock

counter

CH3

CH4

CH1

CH2

CH1

CHID_VINx

EAV or SAV

2 CH : 37.125MHz output

3 CH : 37.125MHz output

4 CH : 37.125MHz output

Application

or FPGA, etc.

(0xC8[3:0],BANK1 = 0x8)

(0xCC[6:4],BANK1= 0x6)

Figure 2.16. NVP6124 Select Channel ID

6. CHID_TYPE(BANK0, 0x54[2:0]=001) mode described in top of Figure2.16.

7. To generate 2bit digit, Design 2bit counter with VCLK1 (The 2bit digit means each channel).

8. Using 2bit digit, Convert from 148.5MHz Data to 37.125MHz Data (Wrong sorting part in Figure2.16.).

and then Define the 2bit digit ( 0 : 1ch data, 1 : 2ch data, 2 : 3ch data, 3 : 4ch data).

namely, 148.5MHz data output separate only with 37.125MHz, 4channel data, is not align with channel

data where becomes mapping in counter value.

9. For mapping between separated each channel data and specified counter value, Select channel

among separated each channel(1CH selected in Figure2.16.).

If selected channel data become Right sorting condition, other 3 channel is sorted automatically.

10. Check the 1ch data output when 2bit counter value is only '0' and then Search the EAV/SAV[3:0]

after FF 00 00 Code.

11. If the EAV/SAV[3:0] is '2', make a counter reset to '3' (Refer to Blue color in Figure2.16.)

12. Become Right sorting part.

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