SAA7103E/V4,557 Просмотр технического описания (PDF) - NXP Semiconductors.
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SAA7103E/V4,557 Datasheet PDF : 84 Pages
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Philips Semiconductors
SAA7102; SAA7103
Digital video encoder
Table 38: RGB DAC adjust coarse registers, subaddresses 17h to 19h, bit description
Subaddress Bit Symbol
Description
17h to 19h 7 to 5 -
must be programmed with logic 0 to ensure compatibility to
future enhancements
17h
4 to 0 RDACC[4:0] output level coarse adjustment for RED DAC; default after
reset is 1Bh for output of C signal
0 0000b ≡ 0.585 V to 1 1111b ≡ 1.240 V at 37.5 Ω nominal for
full-scale conversion
18h
4 to 0 GDACC[4:0] output level coarse adjustment for GREEN DAC; default after
reset is 1Bh for output of VBS signal
0 0000b ≡ 0.585 V to 1 1111b ≡ 1.240 V at 37.5 Ω nominal for
full-scale conversion
19h
4 to 0 BDACC[4:0] output level coarse adjustment for BLUE DAC; default after
reset is 1Fh for output of CVBS signal
0 0000b ≡ 0.585 V to 1 1111b ≡ 1.240 V at 37.5 Ω nominal for
full-scale conversion
Table 39: MSM threshold, subaddress 1Ah, bit description
Bit Symbol
Description
7 to 0 MSMT[7:0] monitor sense mode threshold for DAC output voltage, should be set to 70h
Table 40: Monitor sense mode register, subaddress 1Bh, bit description
Legend: * = default value after reset.
Bit
Symbol Access Value Description
7
MSM R/W
monitor sense mode
0* off; RCOMP, GCOMP and BCOMP bits are not valid
1
on
6 to 3 -
R/W 0
must be programmed with logic 0 to ensure compatibility to
future enhancements
2
RCOMP R
check comparator at DAC on pin RED_CR_C
0
active, output is loaded
1
inactive, output is not loaded
1
GCOMP R
check comparator at DAC on pin GREEN_VBS_CVBS
0
active, output is loaded
1
inactive, output is not loaded
0
BCOMP R
check comparator at DAC on pin BLUE_CB_CVBS
0
active, output is loaded
1
inactive, output is not loaded
SAA7102_SAA7103_4
Product data sheet
Rev. 04 — 18 January 2006
© Koninklijke Philips Electronics N.V. 2006. All rights reserved.
46 of 84
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