ADE3700 datasheet(71/89 Pages) STMICROELECTRONICS

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ADE3700

APC

2.18

APC

APC (formerly known as Arithmos Perfect Color) dithers an input 10 bit video stream down to 4-8

output bits. The dithering is done in space and time in such a way that the eye does not perceive

objectionable artifacts such as:

Fixed dither patterns

Contours

Flickering pixels

Phase correlated flickering, which creates wave patterns known as “swimming”

Table 25: Gamma Registers

Addr

Mode

Bits

Default

Description

GAMMA_CTRL

0x0C10

R/W

[7:4]

0x0

Reserved

[3]

0x0

0: normal

1: disable RAM access

[2]

0x0

0: normal

1: test mode

[1:0]

0x0

Gamma Mode Select

0x0: 10-bit linear bypass

0x1: 8-bit->10-bit gamma table (normal)

0x2: 8-bit linear bypass (no interpolation)

0x3: 8-bit->10-bit gamma table (normal)

Table 26: APC Registers

Addr

Mode

Bits

Default

Description

APC_APC0

0x0C20

[7]

Reserved

R/W

[6:5]

0x0

Frame Modulation Period - 1

R/W

[4:1]

0x0

0x0 - 0x3: 8-bit out

0x4: 4b out

0x5: 5b out

0x6: 6b out

0x7: 7b out

0x8: 8-bit out

R/W

[0]

0x0

0: normal

1: disable APC -- truncate LSBs

APC_APC1

0x0C21

[7:2]

Reserved

R/W

[1]

0x0

Offset the phase LUT

R/W

[0]

0x0

Offset the dither LUT

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