HMP8117 Datasheet, PDF(23/45 Page) Intersil Corporation

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HMP8117 Datasheet, PDF (23/45 Pages) Intersil Corporation – NTSC/PAL Video Decoder

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HMP8117

TABLE 10. CONTROL REGISTER SUMMARY (Continued)

SUB-

ADDRESS

CONTROL REGISTER

RESET/

DEFAULT

VALUE

USE

VALUE

COMMENTS

1BH

Saturation

80H

1CH

Color Gain Adjust

40H

1DH

Video Gain Adjust

80H

1EH

Sharpness

10H

1FH

Host Control

00H

Set bit 7 for Soft Reset. Set bit 6 for Power Down.

20H-23H Closed Caption Data Registers

80H

24H-29H WSS Data & CRC Registers

00H

31H/30H Start H_BLANK MSB/LSB

03H/4AH

Table 3 BLANK programming changes for each video standard.

32H

End H_BLANK

7AH

Table 3 (same as above)

34H/33H Start V_BLANK MSB/LSB

01H/02H

Table 3 (same as above)

35H

End V_BLANK

12H

Table 3 (same as above)

36H

End HSYNC

30H

Table 3 (same as above)

37H

HSYNC Detect Window

20H

90H

A wider window tolerates poorly timed video sources.

41H

MV Control

26H

42H

Reserved

00H

30H

Set bits 5-4 to 11B for optimum performance.

50H

Programmable Fractional Gain

0CH

21H

A slower PFG improves AGC stability.

51H

MV Stripe Gate

14H

52H

Reserved

02H

22H

Set bit 5 to â1â for optimum performance.

53H

AGC Hysteresis

00H

F0H

Larger hysteresis improves AGC stability.

7FH

Device Revision

01H

Production baseline revision is 01H.

Sub-Addresses: 40H, 43H-4FH are reserved. Reads from these registers may return non-zero values.

Sub-Addresses: 07H, 09H, 0DH, 2AH-2FH, 38H-3FH and 54H-7EH are unused. Reads from these registers return 00H. Writes are ignored.

TABLE 11. PRODUCT ID REGISTER

BIT

NUMBER

FUNCTION

SUB ADDRESS = 00H

DESCRIPTION

RESET

STATE

7-0

Product ID

This 8-bit register specifies the last two digits of the product number. Data written to this read-

17H

only register is ignored.

BIT

NUMBER

FUNCTION

Reserved

6-5

Video Timing

Standard

Auto Detect

Video Standard

Setup Select

2-1

Reserved

TABLE 12. INPUT FORMAT REGISTER.

SUB ADDRESS = 01H

DESCRIPTION

These bits are read only unless bit 4 = â0â.

00 = (M) NTSC

01 = (B, D, G, H, I, N) PAL

10 = (M) PAL

11 = Combination (N) PAL; also called (NC) PAL

0 = Manual selection of video timing standard

1 = Auto detect of video timing standard

Typically, this bit should be a â1â during (M) NTSC and (M, N) PAL operation. Otherwise, it should

be a â0â.

0 = Video source has a 0 IRE blanking pedestal

1 = Video source has a 7.5 IRE blanking pedestal

RESET

STATE

00B

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