wm8215 Wolfson Microelectronics plc, wm8215 Datasheet - Page 27

• Manufacturer Part Number: wm8215
• Description: 60msps 10-bit 3-channel Ccd Digitiser
• Manufacturer: Wolfson Microelectronics plc

ADDRESS
100000
(20h)
100001
(21h)
100010
(22h)
100011
(23h)
100100
(24h)
100101
(25h)
100110
(26h)
100111
(27h)
101000
(28h)
101001
(29h)
101010
(2Ah)
101011
(2Bh)
WM8215
Table 6 Register Control Bits
w
<A5:A0>
Offset DAC
(Red)
Offset DAC
(Green)
Offset DAC
(Blue)
Offset DAC
(RGB)
PGA Gain LSB
(Red)
PGA Gain LSB
(Green)
PGA Gain LSB
(Blue)
PGA Gain LSB
(RGB)
PGA gain
MSBs
(Red)
PGA gain
MSBs (Green)
PGA gain
MSBs
(Blue)
PGA gain MSBs
(RGB)
REGISTER
BIT
7:0
7:0
7:0
7:0
7:0
7:0
7:0
7:0
NO
7:1
7:1
7:1
7:1
0
0
0
0
DACRGB[7:0]
PGARGB[8:1]
PGARGB[0]
PGAG[8:1]
DACR[7:0]
DACG[7:0]
DACB[7:0]
PGAR[8:1]
PGAB[8:1]
NAME(S)
Reserved
Reserved
Reserved
Reserved
PGAR[0]
PGAG[0]
PGAB[0]
BIT
10000000
DEFAULT
10000000
10000000
00001100
00001100
00001100
0000000
0000000
0000000
0000000
-
0
0
0
-
-
Red channel 8-bit offset DAC value (mV) =
255*(DACR[7:0]-127.5)/127.5
Green channel 8-bit offset DAC value (mV) =
255*(DACG[7:0]-127.5)/127.5
Blue channel 8-bit offset DAC value (mV) =
255*(DACB[7:0]-127.5)/127.5
A write to this register location causes the red, green and
blue offset DAC registers to be overwritten by the new
value
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.
Must be set to 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.
Must be set to 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.
Must be set to 0
Writing a value to this location causes red, green and blue
PGA LSB gain values to be overwritten by the new value.
Must be set to 0
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
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
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
A write to this register location causes the red, green and
blue PGA MSB gain registers to be overwritten by the new
value.
DESCRIPTION
PD, Rev 4.2, February 2009
Production Data
27