saa7120 NXP Semiconductors, saa7120 Datasheet - Page 15

• Manufacturer Part Number: saa7120
• Description: Digital Video Encoder Condenc
• Manufacturer: NXP Semiconductors

Philips Semiconductors
Table 11 Subaddress 3A
Table 12 Subaddress 5A
Remark: in subaddresses 5B, 5C, 5D, 5E and 62 all IRE values are rounded up.
Table 13 Subaddress 5B and 5D
Table 14 Subaddress 5C and 5E
1997 Jan 06
UV2C
Y2C
SYMP
CBENB
CHPS
GAINU
GAINV
DATA BYTE
DATA BYTE
DATA BYTE
DATA BYTE
Digital Video Encoder (ConDENC)
phase of encoded colour subcarrier
(including burst) relative to horizontal sync;
can be adjusted in steps of
360/256 degrees
variable gain for
Cb signal; input
representation
accordance with
“CCIR 601”
variable gain for
Cr signal; input
representation
accordance with
“CCIR 601”
LOGIC
LEVEL
0
1
0
1
0
1
0
1
DESCRIPTION
DESCRIPTION
Cb, Cr data are two’s complement
Cb, Cr data are straight binary; default after reset
Y data is two’s complement
Y data is straight binary; default after reset
horizontal and vertical trigger is taken from RCV2 and RCV1 respectively; default after reset
horizontal and vertical trigger is decoded out of “CCIR 656” compatible data at MP port
data from input ports is encoded; default after reset
colour bar with fixed colours is encoded
DESCRIPTION
white-to-black = 92.5 IRE
white-to-black = 100 IRE
white-to-black = 92.5 IRE
white-to-black = 100 IRE
GAINU = 0
GAINU = 118 (76H)
GAINU = 0
GAINU = 125 (7DH)
GAINV = 0
GAINV = 165 (A5H)
GAINV = 0
GAINV = 175 (AFH)
CONDITIONS
CONDITIONS
15
VALUE
3FH
69H
67H
89H
DESCRIPTION
PAL-B/G and data from input ports
PAL-B/G and data from look-up table
NTSC-M and data from input ports
NTSC-M and data from look-up table
GAINU = 2.17
output subcarrier of U contribution = 0
output subcarrier of U contribution = nominal
GAINU = 2.05
output subcarrier of U contribution = 0
output subcarrier of U contribution = nominal
GAINV = 1.55
output subcarrier of V contribution = 0
output subcarrier of V contribution = nominal
GAINV = 1.46
output subcarrier of V contribution = 0
output subcarrier of V contribution = nominal
SAA7120; SAA7121
REMARKS
REMARKS
nominal to +1.55
nominal to +1.46
nominal to +2.16
nominal to +2.04
RESULT
Preliminary specification
nominal
nominal
nominal
nominal