STV2310 datasheet(63/112 Pages) STMICROELECTRONICS

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STV2310

DDECCONT7

DDECCONT8

Bit Name

Function

MIX_SLOPE[7:0]

Soft Mixing Slope, Alpha Blending or Saturated Value

This bitfield provides the soft mixing slope or the alpha blending value depending on Fast Blanking mode.

When the blanking mode is in Forced RGB or Forced CVBS mode, this bitfield is irrelevant.

When the blanking mode is in one of the alpha blending modes, the MIX_SLOPE[7:0] register provides the

alpha value (an FF entry means full scale).

When the blanking mode is in the normal mixing mode between RGB and CVBS, the MIX_SLOPE[1:0] bits

indicate the mixing slope. The MIX_SLOPE[7:2] bits must be set to 000000.

The MIX_SLOPE[1:0] register codes the soft mixing slope from 00 to 11 with 00 corresponding to a slope of

1 clock cycle (4 x fSC clock domain) and 11 corresponding to a slope of 4 clock cycles.

The default entry is 01, corresponding to a slope of 2 clock cycles.

Address (hex): 07h

Reset Value (bin): 0000 0000

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

OUTBUS[7:0]

Bit Name

Function

OUTBUS[7:2]

Alternative values driven by OUTBUS

The OUTBUS[7:2] bits are linked to the HSYNC, VSYNC and FIELD pad control.

When OUTBUS[2] = 0: standard function on HSYNC; when = 1: HSYNC = OUTBUS[3]

When OUTBUS[4] = 0: standard function on VSYNC; when = 1: VSYNC = OUTBUS[5]

When OUTBUS[6] = 0: standard function on FIELD; when = 1: FIELD = OUTBUS[7]

OUTBUS[1:0]

Alternative values driven by OUTBUS

The OUTBUS[1:0] bits are linked to the PLLLOCK pad control.

When OUTBUS[0] = 0: standard function; when = 1: PLLLOCK = OUTBUS[1]

Address (hex): 08h

Reset Value (bin): 1111 1111

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

ZOOMIN_FACT[9:2]

Bit Name

Function

ZOOMIN_FACT

[9:2]

Zoom-in Factor from 1 to 4 (MSBs)

The Zoom-in factor operates from 4 to 1 (No zoom). The LSBs of this value are in the

DDECCONTB

3FFh: Zoom-in factor of 1 (No zoom) (Default value)

200h: Zoom-in factor of 2

100h: Zoom-in factor of 4 (Enlarged picture)

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