SAA7108AE Datasheet, PDF (106/208 Pages) NXP Semiconductors – HD-CODEC

NXP Semiconductors
SAA7108AE; SAA7109AE
HD-CODEC
Table 51. 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 52. 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 53. 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
MSA R/W
automatic monitor sense mode
0* off; RCOMP, GCOMP and BCOMP bits are not valid
1
on if MSM = 0
5
MSOE R/W 0
pin TVD is active
1* pin TVD is 3-state
4 and 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_CVBS
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
SAA7108AE_SAA7109AE_3
Product data sheet
Rev. 03 — 6 February 2007
© NXP B.V. 2007. All rights reserved.
106 of 208