ADV7192 datasheet(39/69 Pages) AD

39 / 69 page

ADV7192

–39–

REV. 0

CGMS Data (C/W16–C/W17)

These bits are CGMS data bits only.

C/W17

C/W16

C/W15

C/W14

C/W13

C/W12

C/W11

C/W10

C/W15 – C/W10

CGMS/WSS DATA

C/W17 – C/W16

CGMS DATA

Figure 77. CGMS_WSS Register 1

CGMS_WSS REGISTER 2

C/W1 (C/W27–C/W20)

(Address (SR4–SR0) = 1BH)

CGMS_WSS Register 2 is an 8-bit-wide register. Figure 78 shows

the operations under control of this register.

C/W2 BIT DESCRIPTION

CGMS/WSS Data (C/W20–C/W27)

These bit locations are shared by CGMS data and WSS data. In

NTSC mode these bits are CGMS data. In PAL mode these bits

are WSS data.

C/W27 – C/W20

CGMS/WSS DATA

C/W27

C/W26

C/W25

C/W24

C/W23

C/W22

C/W21

C/W20

Figure 78. CGMS_WSS Register 2

CONTRAST CONTROL REGISTER (CC00–CC07)

(Address (SR4–SR0) = 1DH)

The contrast control register is an 8-bit-wide register used to

scale the Y output levels. Figure 79 shows the operation under

control of this register.

Y Scale Value (CC00–CC07)

These eight bits represent the value required to scale the Y pixel

data from 0.0 to 1.5 of its initial level. The value of these eight

bits is calculated using the following equation:

Y Scale Value = Scale Factor

× 128

Example:

Scale Factor = 1.18

Y Scale Value = 1.18

× 128 = 151.04

Y Scale Value = 151 (rounded to the nearest integer)

Y Scale Value = 10010111b

Y Scale Value = 97h

CC07 – CC00

Y SCALE VALUE

CC07

CC06

CC05

CC04

CC03

CC02

CC01

CC00

Figure 79. Contrast Control Register

COLOR CONTROL REGISTERS 1–2 (CC1–CC2)

(Address (SR4–SR0) = 1EH–1FH)

The color control registers are 8-bit-wide registers used to scale

the U and V output levels. Figure 75 shows the operations under

control of these registers.

CC17 – CC10

U SCALE VALUE

CC17

CC16

CC15

CC14

CC13

CC12

CC11

CC10

CC27 – CC20

V SCALE VALUE

CC27

CC26

CC25

CC24

CC23

CC22

CC21

CC20

Figure 80. Color Control Registers

CC1 BIT DESCRIPTION

U Scale Value (CC10–CC17)

These eight bits represent the value required to scale the U level

from 0.0 to 2.0 of its initial level. The value of these eight bits is

calculated using the following equation:

U Scale Value = Scale Factor

× 128

Example:

Scale Factor = 1.18

U Scale Value = 1.18

× 128 = 151.04

U Scale Value = 151 (rounded to the nearest integer)

U Scale Value = 10010111b

U Scale Value = 97h

CC2 BIT DESCRIPTION

V Scale Value (CC20–CC27)

These eight bits represent the value required to scale the V pixel

data from 0.0 to 2.0 of its initial level. The value of these eight

bits is calculated using the following equation:

V Scale Value = Scale Factor

× 128

Example:

Scale Factor = 1.18

V Scale Value = 1.18

× 128 = 151.04

V Scale Value = 151 (rounded to the nearest integer)

V Scale Value = 10010111b

V Scale Value = 97h

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