SAA4956TJ NXP Semiconductors, SAA4956TJ Datasheet - Page 15

• Manufacturer Part Number: SAA4956TJ
• Manufacturer: NXP Semiconductors

Specifications of SAA4956TJ

• Operating Temperature (max): 70C
• Operating Temperature (min): 0C
• Mounting: Surface Mount
• Operating Temperature Classification: Commercial
• Lead Free Status / RoHS Status: Supplier Unconfirmed

Philips Semiconductors
Table 6 Write registers
1998 Dec 08
REGISTER
Subregister 20H to 23H (Ksteps of the look-up tables of luminance and chrominance)
20H
21H
22H
23H
Subregister 24H (K-factor controls of luminance)
24H
Subregister 25H (K-factor controls of chrominance)
25H
Subregister 26H (miscellaneous)
26H
Subregister 27H (miscellaneous)
27H
2.9-Mbit field memory with noise reduction
0 to 3 Kstep0
4 to 7 Kstep1
0 to 3 Kstep2
4 to 7 Kstep3
0 to 3 Kstep4
4 to 7 Kstep5
0 to 3 Kstep6
4 to 7 Kstep7
0 to 3 Klumafix
4 to 6 Yadapt_gain
7
0 to 3 Kchromafix
4 to 6 Cadapt_gain
7
0
1
2
3
4
5
6
7
0
1
2 to 7 reserved
BIT
lumafix
chromafix
DPCMin
DPCMout
Klumatochroma 0
unfiltered
noise_shape
chroma_invert
split_screen
reserved
no_refresh
field_sync
NAME
2
3
4
6
4
6
4
6
15
1
0
15
1
0
0
0
0
1
0
0
0
0
DEFAULT
step in adaptive curve from K =
step in adaptive curve from K =
step in adaptive curve from K =
step in adaptive curve from K =
step in adaptive curve from K =
step in adaptive curve from K =
step in adaptive curve from K =
step in adaptive curve from K =
value of the fixed K-factor of the luminance; see Table 3
value of the gain of the adaptive curve of the luminance;
see Table 2
adaptive (lumafix = 0) or fixed K mode (lumafix = 1) of the
luminance
value of the fixed K-factor of the luminance; see Table 3
value of the gain of the adaptive curve of the chrominance;
see Table 2
adaptive (chromafix = 0) or fixed K mode (chromafix = 1) of
chrominance
if HIGH: converts the chrominance input from DPCM to 4 : 2 : 2
format
if HIGH: converts the chrominance output from 4 : 2 : 2 to DPCM
format
if HIGH: uses luminance K-factor for chrominance path
if HIGH: band splitting is deactivated, complete difference signals
are used
if HIGH: noise shaping is activated
if HIGH: chrominance input signals U and V are inverted
if HIGH: demo mode is activated with noise reduction only at the
right screen side
if HIGH: disables internal self-refresh to allow T
for PAN-IC
if HIGH: synchronizes the noise reduction via RSTW (split_screen
and DPCM not possible). Otherwise sync is line related detected
by WE 5 cycle LOW followed by a HIGH cycle.
15
FUNCTION
1
1
2
3
4
5
6
7
16
8
8
8
8
8
8
8
to K =
to K =
to K =
to K =
to K =
to K =
to K =
to K =
2
3
4
5
6
7
8
1
Preliminary specification
8
8
8
8
8
8
8
8
; weight of 1
; weight of 2
; weight of 2
; weight of 4
; weight of 4
; weight of 8
; weight of 8
; weight of 1
SAA4956TJ
cy(SWCK)
= 29 ns