ADV7194KST(Rev0) View Datasheet(PDF) - Analog Devices

Part Name

Description

Manufacturer

ADV7194KST
(Rev.:Rev0)

Professional Extended-10 Video Encoder with 54 MHz Oversampling

Analog Devices 

ADV7194

MODE REGISTER 0

MR0 (MR07–MR00)

(Address (SR4–SR0) = 00H)

Figure 55 shows the various operations under the control of

Mode Register 0.

MR0 BIT DESCRIPTION

Output Video Standard Selection (MR00–MR01)

These bits are used to setup the encoder mode. The ADV7194

can be set up to output NTSC, PAL (B, D, G, H, I), or PAL N

standard video.

Luminance Filter Select (MR02–MR04)

These bits specify which luma filter is to be selected. The filter

selection is made independent of whether PAL or NTSC is

selected.

Chrominance Filter Select (MR05–MR07)

These bits select the chrominance filter. A low-pass filter can be

selected with a choice of cutoff frequencies (0.65 MHz, 1.0 MHz,

1.3 MHz, 2 MHz, or 3 MHz) along with a choice of CIF or

QCIF filters.

MODE REGISTER 1

MR1 (MR17–MR10)

(Address (SR4–SR0) = 01H)

Figure 56 shows the various operations under the control of

Mode Register 1.

MR1 BIT DESCRIPTION

DAC Control (MR10–MR15)

Bits MR15–MR10 can be used to power down the DACs. This are

used to reduce the power consumption of the ADV7194 or if any

of the DACs are not required in the application.

4؋ Oversampling Control (MR16)

To enable 4× Oversampling this bit has to be set to 1. When

enabled, the data is output at a frequency of 54 MHz.

Note that PLL Enable Control has to be enabled (MR61 = 0) in

4× Oversampling mode.

Reserved (MR17)

A Logical 0 must be written to this bit.

MR07

MR06

MR05

MR04

MR03

MR02

MR01

MR00

CHROMA FILTER SELECT

MR07 MR06 MR05

0 0 0 1.3 MHz LOW-PASS FILTER

0 0 1 0.65 MHz LOW-PASS FILTER

0 1 0 1.0 MHz LOW-PASS FILTER

0 1 1 2.0 MHz LOW-PASS FILTER

1 0 0 RESERVED

1 0 1 CIF

1 1 0 QCIF

1 1 1 3.0 MHz LOW-PASS FILTER

OUTPUT VIDEO

STANDARD SELECTION

MR01 MR00

0 0 NTSC

0 1 PAL (B, D, G, H, I)

1 0 RESERVED

1 1 PAL (N)

LUMA FILTER SELECT

MR04 MR03 MR02

0 0 0 LOW-PASS FILTER (NTSC)

0 0 1 LOW-PASS FILTER (PAL)

0 1 0 NOTCH FILTER (NTSC)

0 1 1 NOTCH FILTER (PAL)

1 0 0 EXTENDED MODE

1 0 1 CIF

1 1 0 QCIF

1 1 1 RESERVED

Figure 55. Mode Register 0, MR0

MR17

MR16

MR15

MR14

MR13

MR12

MR11

MR10

MR17

ZERO MUST

BE WRITTEN

TO THIS BIT

DAC A

DAC CONTROL

MR15

0 POWER-DOWN

1 NORMAL

DAC C

DAC CONTROL

MR13

0 POWER-DOWN

1 NORMAL

DAC E

DAC CONTROL

MR11

0 POWER-DOWN

1 NORMAL

4؋ OVERSAMPLING

CONTROL

MR16

0 2؋ OVERSAMPLING

1 4؋ OVERSAMPLING

DAC B

DAC CONTROL

MR14

0 POWER-DOWN

1 NORMAL

DAC D

DAC CONTROL

MR12

0 POWER-DOWN

1 NORMAL

DAC F

DAC CONTROL

MR10

0 POWER-DOWN

1 NORMAL

Figure 56. Mode Register 1, MR1

–30–

REV. 0

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