LM1238 Address Map

TABLE 3. I

Address Range

R/W

Description

0x0800h-0x0805h

R/W

OSD register set up data

0x0810h-0x081Fh

R/W

Preamp register set up data

Pre-Amp Interface I

TABLE 4. LM1238 Pre-Amplifier Interface I

Register

Address

Default

D7

D6

D5

D4

D3

D2

D1

D0

BGAINCTRL

0x0810

0xE0h

RSV

BGAIN[6:0]

GGAINCTRL

0x0811

0xE0h

RSV

GGAIN[6:0]

RGAINCTRL

0x0812

0xE0h

RSV

RGAIN[6:0]

CONTRCTL

0x0813

0xE0h

RSV

CONTRAST[6:0]

DAC2CTRL

0x0814

0x80h

DAC2[7:0]

DAC3CTRL

0x0815

0x80h

DAC3[7:0]

DAC1CTRL

0x0816

0x80h

DAC1[7:0]

DAC4CTRL

0x0817

0x80h

DAC4[7:0]

DCF/OSD-Con/DC

0x0818

RSV

DCONFIG[1..0]

OSD_CONT[1..0]

DC_OFFSET[2..0]

GLOBALCTRL

0x0819

D_ID[5:0]

PS

BV

CLMP/PLL/VBL/OOR

0x81E

INT

NV

CLMP

FRE

OOR

VBL

PFR[1:0]

SRTSTCTRL

0x81F

RSV

RSV

RSV

RSV

RSV

RSV

RSV

SRST

TABLE 5. OSD Interface I

Register

Address

Default

D7

D6

D5

D4

D3

D2

D1

D0

BAR_CNTL

0x0800h

0x00h

BAR[4:0]

CNTL[2:0]

ICN_INDX

0x0801h

0x00h

ICON[3:0]

INDEX[2:0]

HORIZ

0x0802h

0xD0h

PPL[1:0]

HPOS[5:0]

VERT

0x0803h

0xCCh

HT[1:0]

VPOS[5:0]

ALT

0x0804h

0x04h

RSV

RSV

ASO1

ASO0

ALT[3:0]

VERTBLNK

0x0805h

0x10h

RSV

VB[6:0]

Control Register Definitions

OSD INTERFACE REGISTERS

Bar Indicator and OSD Interface Control Register (I

Register Name (address): BAR_CNTL (0x0800h)

7

654321

0

BAR4

BAR3

BAR2

BAR1

BAR0

CNTL2

CNTL1

CNTL0

Bits 2–0 OSD Controls. These three bits turn on and off the OSD window and allow the up, down, left and right icons to be

highlighted in color 1 out of the 8 colors available.

Note that when the highlight bits are turned on, the control codes will be reset to 001b, after 32 vertical field periods.

Reading back the register more than 32 fields after a write to these bits will give 00 for the bits 1 and 2.

21

0

0

0

0

Turn off OSD

0

0

1

Turn on OSD and normal button colors

0

1

0

Turn on OSD and highlight up arrow for 32 vertical periods.

1

0

0

Turn on OSD and highlight down arrow for 32 vertical

periods.

0

1

1

Turn on OSD and highlight “+” for 32 vertical periods.

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