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HD49335NP/HNP
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
[0]
CR Time Constant (Typ)
(cutoff frequency conversion)
[0]
CR Time Constant (Typ)
(cutoff frequency conversion)
8.
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.
Table 7
SHAMP Frequency Characteristics Setting
LoPwr
(Register setting)
"Lo"
"Hi"
Note: Upper line
: SHAMP cutoff frequency (Typ)
Middle line
: Standard value of C4 (maximum value is not defined)
Lower line
: Minimum value of C4 (do not set below this value)
Rev.1.0, Feb.12.2004, page 9 of 29
[1]
[2]
[3]
[0]
[1]
[2]
[3]
[0]
[1]
L
L
L
L
H
L
L
L
L
2.20 nsec
2.30 nsec
2.51 nsec
(72 MHz)
(69 MHz)
(63 MHz)
[1]
[2]
[3]
[0]
[1]
[2]
[3]
[0]
[1]
L
L
L
H
H
L
L
H
L
4.40 nsec
4.80 nsec
5.87 nsec
(36 MHz)
(33 MHz)
(27 MHz)
[0]
[1]
[0]
L
L
230 MHz
6800 pF
(240 pF)
100 MHz
10000 pF
(560 pF)
SHSW-fsel (Register setting)
[2]
[3]
[0]
[1]
[2]
[3]
[0]
[1]
[2]
H
L
L
H
H
L
L
L
L
H
2.64 nsec
2.93 nsec
(60 MHz)
(54 MHz)
SHSW-fsel (Register setting)
[2]
[3]
[0]
[1]
[2]
[3]
[0]
[1]
[2]
H
L
H
H
H
L
H
L
L
H
6.60 nsec
8.80 nsec
(24 MHz)
(18 MHz)
SHA-fsel (Register setting)
[1]
[0]
H
L
L
116 MHz
10000 pF
13000 pF
(270 pF)
49 MHz
15000 pF
22000 pF
(620 pF)
[3]
[0]
[1]
[2]
[3]
[0]
[1]
[2]
[3]
L
H
L
H
L
L
H
H
L
3.11 nsec
3.52 nsec
(51 MHz)
(45 MHz)
[3]
[0]
[1]
[2]
[3]
[0]
[1]
[2]
[3]
H
H
L
H
H
L
H
H
H
10.6 nsec
17.6 nsec
(15 MHz)
(9 MHz)
BLKC
31
C
Recommendation value of C is 1000 pF
[1]
[0]
H
H
75 MHz
56 MHz
18000 pF
(300 pF)
(360 pF)
32 MHz
24 MHz
27000 pF
(750 pF)
(820 pF)
[0]
[1]
[2]
[3]
H
H
H
L
3.77 nsec
(42 MHz)
[0]
[1]
[2]
[3]
H
H
H
H
26.4 nsec
(6 MHz)
[1]
H
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