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WM8215 Datasheet(PDF) 27 Page - Wolfson Microelectronics plc |
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WM8215 Datasheet(HTML) 27 Page - Wolfson Microelectronics plc |
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27 / 31 page  WM8215 Production Data w PD, Rev 4.3, September 2012 27 ADDRESS <A5:A0> REGISTER BIT NO BIT NAME(S) DEFAULT DESCRIPTION 100000 (20h) Offset DAC (Red) 7:0 DACR[7:0] 10000000 Red channel 8-bit offset DAC value (mV) = 255*(DACR[7:0]-127.5)/127.5 100001 (21h) Offset DAC (Green) 7:0 DACG[7:0] 10000000 Green channel 8-bit offset DAC value (mV) = 255*(DACG[7:0]-127.5)/127.5 100010 (22h) Offset DAC (Blue) 7:0 DACB[7:0] 10000000 Blue channel 8-bit offset DAC value (mV) = 255*(DACB[7:0]-127.5)/127.5 100011 (23h) Offset DAC (RGB) 7:0 DACRGB[7:0] - A write to this register location causes the red, green and blue offset DAC registers to be overwritten by the new value 100100 (24h) PGA Gain LSB (Red) 0 PGAR[0] 0 This register bit forms the LSB of the red channel PGA gain code. PGA gain is determined by combining this register bit and the 8 MSBs contained in register address 28 hex. 7:1 Reserved 0000000 Must be set to 0 100101 (25h) PGA Gain LSB (Green) 0 PGAG[0] 0 This register bit forms the LSB of the green channel PGA gain code. PGA gain is determined by combining this register bit and the 8 MSBs contained in register address 29 hex. 7:1 Reserved 0000000 Must be set to 0 100110 (26h) PGA Gain LSB (Blue) 0 PGAB[0] 0 This register bit forms the LSB of the blue channel PGA gain code. PGA gain is determined by combining this register bit and the 8 MSBs contained in register address 2A hex. 7:1 Reserved 0000000 Must be set to 0 100111 (27h) PGA Gain LSB (RGB) 0 PGARGB[0] - Writing a value to this location causes red, green and blue PGA LSB gain values to be overwritten by the new value. 7:1 Reserved 0000000 Must be set to 0 101000 (28h) PGA gain MSBs (Red) 7:0 PGAR[8:1] 00001100 Bits 8 to 1 of red PGA gain. Combined with red LSB register bit to form complete PGA gain code. This determines the gain of the red channel PGA according to the equation: Red channel PGA gain (V/V) = 0.66 + PGAR[8:0]x7.34/511 101001 (29h) PGA gain MSBs (Green) 7:0 PGAG[8:1] 00001100 Bits 8 to 1 of green PGA gain. Combined with green LSB register bit to form complete PGA gain code. This determines the gain of the green channel PGA according to the equation: Green channel PGA gain (V/V) = 0.66 + PGAG[8:0]x7.34/511 101010 (2Ah) PGA gain MSBs (Blue) 7:0 PGAB[8:1] 00001100 Bits 8 to 1 of blue PGA gain. Combined with blue LSB register bit to form complete PGA gain code. This determines the gain of the blue channel PGA according to the equation: Blue channel PGA gain (V/V) = 0.66 + PGAB[8:0]x7.34/511 101011 (2Bh) PGA gain MSBs (RGB) 7:0 PGARGB[8:1] - A write to this register location causes the red, green and blue PGA MSB gain registers to be overwritten by the new value. Table 6 Register Control Bits |
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