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ADV7183B Datasheet(PDF) 59 Page - Analog Devices |
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ADV7183B Datasheet(HTML) 59 Page - Analog Devices |
59 / 100 page ADV7183B Rev. B | Page 59 of 100 PIXEL PORT CONFIGURATION The ADV7183B has a very flexible pixel port that can be confi- gured in a variety of formats to accommodate downstream ICs. 256H Table 79 and 257H Table 80 summarize the various functions that the ADV7183B’s pins can have in different modes of operation. The ordering of components (for example, Cr versus Cb, CHA/B/C) can be changed. Refer to the section. 258H Table 79 indicates the default positions for the Cr/Cb components. OF_SEL[3:0] Output Format Selection, Address 0x03[5:2] The modes in which the ADV7183B pixel port can be onfigured are under the control of OF_SEL[3:0]. See 259H Table 80 for details. The default LLC frequency output on the LLC1 pin is approximately 27 MHz. For modes that operate with a nominal data rate of 13.5 MHz (0001, 0010), the clock frequency on the LLC1 pin stays at the higher rate of 27 MHz. For information on outputting the nominal 13.5 MHz clock on the LLC1 pin, see the 260H PAD_SEL[2:0], Address 0x8F[6:4] section. SWPC Swap Pixel Cr/Cb, Address 0x27[7] This bit allows Cr and Cb samples to be swapped. When SWPC is 0 (default), no swapping is allowed. When SWPC is 1, the Cr and Cb values can be swapped. PAD_SEL[2:0], Address 0x8F[6:4] This I2C write allows the user to select between the LLC1 (nominally at 27 MHz) and LLC2 (nominally at 13.5 MHz). The LLC2 signal is useful for LLC2-compatible wide bus (16-bit) output modes. See the 261H OF_SEL[3:0] Output Format Selection, Address 0x03[5:2] section for additional information. The LLC2 signal and data on the data bus are synchronized. By default, the rising edge of LLC1/LLC2 is aligned with the Y data; the falling edge occurs when the data bus holds C data. The polarity of the clock, and therefore the Y/C assignments to the clock edges, can be altered by using the Polarity LLC pin. When LLC_PAD_SEL[2:0] is 000 (default), the output is nominally 27 MHz LLC on the LLC1 pin. When LLC_PAD_SEL[2:0] is 101, the output is nominally 13.5 MHz LLC on the LLC1 pin. Table 79. P15 to P0 Output/Input Pin Mapping Data Port Pins P[15:0] Format, and Mode 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Video Out, 8-Bit, 4:2:2 YCrCb[7:0] OUT Video Out, 16-Bit, 4:2:2 Y[7:0] OUT CrCb[7:0] OUT Table 80. Standard Definition Pixel Port Modes P[15: 0] OF_SEL[3:0] Format P[15:8] P[7: 0] 0010 16-bit @ LLC2 4:2:2 Y[7:0] CrCb[7:0] 0011 (default) 8-bit @ LLC1 4:2:2 (default) YCrCb[7:0] (default) Three-state 0110-1111 Reserved Reserved. Do not use. |
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