HD49335F/HF

Rev.1.0, Feb.25.2004, page 9 of 29

7. Adjustment of Black-Level S/H Response Frequency Characteristics

The CR time constant that is used for sampling/hold (S/H) at the black level can be adjusted by changing the

register settings, as shown in table 6.

Table 6

SHSW CR Time Constant Setting

31

BLKC

C

Recommendation value of C is 1000 pF

The SHAMP frequency characteristics can be adjusted by changing the register settings

and the C4 value of the external pin.

The settings are shown in table 7.

Values other than those shown in the table 7 cannot be used.

8.

2.20 nsec

(72 MHz)

2.30 nsec

(69 MHz)

2.51 nsec

(63 MHz)

2.64 nsec

(60 MHz)

2.93 nsec

(54 MHz)

3.11 nsec

(51 MHz)

3.52 nsec

(45 MHz)

3.77 nsec

(42 MHz)

L

[3]

L

[0]

L

[0]

4.40 nsec

(36 MHz)

4.80 nsec

(33 MHz)

L

[1]

L

[1]

L

[2]

L

[2]

5.87 nsec

(27 MHz)

6.60 nsec

(24 MHz)

8.80 nsec

(18 MHz)

10.6 nsec

(15 MHz)

17.6 nsec

(9 MHz)

26.4 nsec

(6 MHz)

L

[3]

H

[3]

H

[0]

H

[0]

L

[1]

L

[1]

L

[2]

L

[2]

L

[3]

H

[3]

L

[0]

L

[0]

H

[1]

H

[1]

L

[2]

L

[2]

L

[3]

H

[3]

H

[0]

H

[0]

H

[1]

H

[1]

L

[2]

L

[2]

L

[3]

H

[3]

L

[0]

L

[0]

L

[1]

L

[1]

H

[2]

H

[2]

L

[3]

H

[3]

H

[0]

H

[0]

L

[1]

L

[1]

H

[2]

H

[2]

L

[3]

H

[3]

L

[0]

L

[0]

H

[1]

H

[1]

H

[2]

H

[2]

L

[3]

H

[3]

H

[0]

H

[0]

H

[1]

H

[1]

H

[2]

H

[2]

H

[3]

SHSW-fsel (Register setting)

SHSW-fsel (Register setting)

CR Time Constant (Typ)

(cutoff frequency conversion)

CR Time Constant (Typ)

(cutoff frequency conversion)

Table 7

SHAMP Frequency Characteristics Setting

230 MHz

6800 pF

(240 pF)

56 MHz

18000 pF

(360 pF)

116 MHz

10000 pF

(270 pF)

100 MHz

10000 pF

(560 pF)

"Lo"

"Hi"

24 MHz

27000 pF

(820 pF)

75 MHz

13000 pF

(300 pF)

32 MHz

22000 pF

(750 pF)

49 MHz

15000 pF

(620 pF)

L

[0]

H

[0]

L

[1]

L

[1]

L

[0]

H

[1]

H

[0]

H

[1]

SHA-fsel (Register setting)

LoPwr

(Register setting)

Note: Upper line

Middle line

Lower line

: SHAMP cutoff frequency (Typ)

: Standard value of C4 (maximum value is not defined)

: Minimum value of C4 (do not set below this value)