STW8009 STMicroelectronics, STW8009 Datasheet - Page 38

• Manufacturer Part Number: STW8009
• Description: Mobile Video Denc
• Manufacturer: STMicroelectronics

Control registers
Table 15.
38/65
chroma_main_coef_0
chroma_main_coef_1
chroma_main_coef_2
chroma_main_coef_3
chroma_main_coef_4
chroma_main_coef_5
chroma_main_coef_6
chroma_main_coef_7
chroma_main_coef_8
REGISTERS 72 to 80
Chroma filter coefficients
Chroma main_coef_[8:0]
Values from these registers are used only when bit main_flt_s (Reg 72) is set to 1. Bit
main_flt_s has the highest priority over the rest. With main_flt_s bit set to 1, all bits from
main_plg_div[1:0] need to be programmed to the chroma coefficients. Alternatively, the
coefficients default values are loaded depending on the selected mode or the selected filter
type in a particular mode with flt(1:0) bits from register 1.
The values are soft loaded when main_flt_s = 1. The value to be loaded in the register
should be the actual coefficient value + an offset. The hardware will internally subtract this
offset to get the actual coefficient value.
main_flt-s default value: 0
The main_plg_div value is chosen according to the sum of all the coefficients.
main_plg_div = 11 when sum of coeffs = 4096
main_plg_div = 10 when sum of coeffs = 2048
main_plg_div = 01 when sum of coeffs = 1024, (default)
main_plg_div = 00 when sum of coeffs = 512
Offset change before loading to user register:
chroma_main_coef0 = Actual value + 16;
chroma_main_coef1 = Actual value + 32;
chroma_main_coef2 = Actual value + 64;
chroma_main_coef3 = Actual value + 32;
:
reg_
72
reg_
73
reg_
74
reg_
75
reg_
76
reg_
77
reg_
78
reg_
79
reg_
80
main_flt_s
xxx
xxx
xxx
coef4(7)
coef5(7)
coef6(7)
coef7(7)
coef8(7)
main_plg
_div1
coef8(8)
coef2(6)
coef3(6)
coef4(6)
coef5(6)
coef6(6)
coef7(6)
coef8(6)
main_plg
_div0
coef1(5)
coef2(5)
coef3(5)
coef4(5)
coef5(5)
coef6(5)
coef7(5)
coef8(5)
Address:
0x0048 to 0x0050
coef0(4) coef0(3) coef0(2) coef0(1) coef0(0)
coef1(4) coef1(3) coef1(2) coef1(1) coef1(0)
coef2(4) coef2(3) coef2(2) coef2(1) coef2(0)
coef3(4) coef3(3) coef3(2) coef3(1) coef3(0)
coef4(4) coef4(3) coef4(2) coef4(1) coef4(0)
coef5(4) coef5(3) coef5(2) coef5(1) coef5(0)
coef6(4) coef6(3) coef6(2) coef6(1) coef6(0)
coef7(4) coef7(3) coef7(2) coef7(1) coef7(0)
coef8(4) coef8(3) coef8(2) coef8(1) coef8(0)
Type: R/W
STw8009/STw8019