BT860-BT861 Datasheet, PDF (38/111 Pages) Conexant Systems, Inc – Multiport YCrCb to NTSC / PAL / SECAM Digital Video Encoder

Bt860/861
Multiport YCrCb to NTSC/PAL /SECAM
3
Table 3-4. Register Programming Values for SECAM
Parameter Description
Register Name
Register Number
System Clock Frequency
(MHz)
27
29.5
Number of Lines
625 Line
16[5]
1
1
Width of Analog Horizontal Sync Pulse
AHSYNC_WIDTH
08[7:0]
7F
8B
Cross Color Filtering Off
CR0SSFILT
ID[0]
0
0
Upper Db Limit
DB_MAX
34[1:0]/33[7:0]
5A3
529
Lower Db Limit
DB_MIN
36[1:0]/35[7:0]
49F
43B
Upper Dr Limit
DR_MAX
30[1:0]/2F[7:0]
5A3
529
Lower Dr Limit
DR_MIN
32[1:0]/31[7:0]
49F
43B
Bottleneck Pulses
FIELD_ID
1B[6]
0⁽¹⁾
0⁽¹⁾
FM Modulation
FM
16[2]
1
1
Number of Active Pixels per Line
HACTIVE
07[1:0]/06[7:0]
2C0
300
Number of System Clocks from O_H to
Active Video
HBLANK
0C[1:0]/0B[7:0]
128
140
Beginning of Subcarrier
HBURST_BEG
09[7:0]
97
A5
Number of System Clocks Per Line
HCLOCK
05[3:0]/04[7:0]
6C0
760
Cb Multiplier
M_CB
A2
94
9A
Cr Multiplier
M_CR
C5
B5
BB
Y Multiplier
M_Y
22[7:0]
A4
A4
Subcarrier Increment for Db
MSC_DB
2D[7:0]/2C[7:0]
2B[7:0]/2A[7:0]
284BDA13
24E1A08B
Subcarrier Increment for Dr
MSC_DR
29[7:0]/28[7:0]
27[7:0]/26[7:0]
29C71C72
263CBEEA
Interlace Off
NI
16[1]
0
0
Phase Alternation
PAL
16[3]
0
0
Programmable Subcarrier Mode
PROG_SC
1A[1]
0
0
Subcarrier Amplitude
SC_AMP
86
86
85
Subcarrier Phase Pattern
SC_PATTERN
1A[0]
0
0
Setup
SETUP
16[4]
0
0
Sync Tip to Blank Amplitude
SYNC_AMP
1E[7:0]
F0
F0
Number of Active Lines
VACTIVE
0F[0]/0E[7:0]
11F
11F
Number of Blanked Lines from O_V⁽²⁾
VBLANK
0D[7:0]
17
17
Analog and Digital Vertical Sync Duration VSYNC_DUR
16[6]
1
1
NOTE(S):
(1) _{To enable synchronization bottleneck pulses, this bit must be 1.}
(2) _{Internal timing and the values programmed into the registers reference the analog VSYNC pulse (OV) as line #1 (see}
Figures 3-1 and 3-2).
3-8
Conexant
D860DSA