ADV7152

–28–

REV. B

APPENDIX 5

INITIALIZATION AND PROGRAMMING

ADV7152 Initialization

After power has been supplied, the ADV7152 must be initial-

ized. The Mode Register and Control Registers must be set.

The values written to the various registers will be determined by

the desired operating mode of the part, i.e., True Color/Pseudo

Color, 2:1 Muxing/2:1 Muxing, etc.

The following section gives examples of initialization of the

ADV7152 operating in various modes.

Example 1

Color Mode

24-Bit True Color

Multiplexing

2:1

Databus

8-Bit

RAM-DAC Resolution

8-Bit

SYNC

Enabled on IOG

Pedestal

7.5 IRE

Register Initialization

C1

C0

R/W

Comment

Write

09H to Mode Register (MR1)

1

1

0

Resets to Normal Operation, 8-Bit Bus/RAM-DAC

Write

08H to Mode Register (MR1)

1

1

0

*(Initializes Pipelining

Write

09H to Mode Register (MR1)

1

1

0

*( “

Write

29H to Mode Register (MR1)

1

1

0

*(Calibrates LOADOUT/LOADIN Timing

Write

09H to Mode Register (MR1)

1

1

0

*( “

Write

04H to Address Register (A7–A0)

0

0

0

Address Reg Points to Pixel Mask Register

Write

FFH to Pixel Mask Register

1

0

0

Sets the Pixel Mask to All “1s”

Write

05H to Address Register (A7–A0)

0

0

0

Address Reg Points to Command Register 1 (CR1)

Write

00H to Command Reg 1 (CR1)

1

0

0

Write

06H to Address Register (A7–A0)

0

0

0

Address Reg Points to Command Register 2 (CR2)

Write

ECH to Command Reg 2 (CR2)

1

0

0

Sets 24-Bit Color, 7.5 IRE, SYNC on Green (IOG)

Write

07H to Address Register (A7–A0)

0

0

0

Address Reg Points to Command Register 3 (CR3)

Write

40H to Command Reg 3 (CR3)

1

0

0

Sets 2:1 Multiplexing, PRGCKOUT = CLOCK/4

Color Palette RAM Initialization

C1

C0

R/W

Comment

Write

00H to Address Register (A7–A0)

0

0

0

Points to Color Palette RAM

Write

00H (Red Data) to RAM Location (00H)

0

1

0

(Initializes Palette RAM

Write

00H (Green Data) to RAM Location (00H)

0

1

0

(

to a Linear Ramp**

Write

00H (Blue Data) to RAM Location (00H)

0

1

0

(

Write

01H (Red Data) to RAM Location (01H)

0

1

0

(

Write

01H (Green Data) to RAM Location (01H)

0

1

0

(

Write

01H (Blue Data) to RAM Location (01H)

0

1

0

(

•

•••

•

•

•

•

(

•

•••

•

•

•

•

(

Write

FFH (Red Data) to RAM Location (FFH)

0

1

0

(

Write

FFH (Green Data) to RAM Location (FFH)

0

1

0

(

Write

FFH (Blue Data) to RAM Location (FFH)

0

1

0

(RAM Initialization Complete

“A” input. Mode Register bit MR10 is written by a “1” followed by “0” followed by “1.” LOADIN/LOADOUT timing is internally synchronized by writing a “0”

followed by a “1” followed by a “0” to Mode Register MR15.

**This sequence of instructions would, of course, normally be coded using some form of loop instruction.