Bt860/861
5.0 Serial Programming Interface and Registers
5.4 Register Detail
Multiport YCrCb to NTSC/PAL /SECAM
Register 23–25
Default
Value
Register
D7
D6
D5
D4
D3
D2
D1
D0
23
24
25
80
M_COMP_D[7:0]
M_COMP_F[7:0]
M_COMP_E[7:0]
80
80
M_COMP_D[7:0]
M_COMP_F[7:0]
M_COMP_E[7:0]
Multiplication Factor for the Component at DAC D
Multiplication Factor for the Component at DAC F
Multiplication Factor for the Component at DAC E
M_COMP_x = gain, where 0 < gain < 1.99
128
DAC output values are truncated to 1023.
Register 26–29
Default
Register
D7
D6
D5
D4
D3
D2
D1
D0
Value
26
27
28
29
1F
7C
F0
21
M_SC_DR[7:0]
M_SC_DR[15:8]
M_SC_DR[23:16]
M_SC_DR[31:24]
M_SC_DR[31:0]
Subcarrier Increment for NTSC/PAL or Dr for SECAM
M_SC_DR[31:0] = int ((FSC / FCLK) × 232 + 0.5)
where: FSC = the subcarrier frequency, FCLK = system clock (luminance sample frequency)
Use relationship between HCLK and the subcarrier frequency as given in ITU-R BT.470.
See Section 3.1.5.
Register 2A–2D
Default
Register
D7
D6
D5
D4
D3
D2
D1
D0
Value
2A
2B
2C
2D
13
DA
4B
28
M_SC_DB[7:0]
M_SC_DB[15:8]
M_SC_DB[23:16]
M_SC_DB[31:24]
M_SC_DB[31:0]
Subcarrier Increment for Db for SECAM
M_SC_DB[31:0] = int ((FSC / FCLK) × 232 + 0.5)
where: FSC = subcarrier frequency, FCLK = system clock (luminance sample frequency)
D860DSA
Conexant
5-27
CONEXANT [ CONEXANT SYSTEMS, INC ]
