HMP8115 Intersil Corporation, HMP8115 Datasheet - Page 20

• Manufacturer Part Number: HMP8115
• Description: Ntsc/pal Video Decoder
• Manufacturer: Intersil Corporation

REAL TIME CONTROL INTERFACE
The Real Time Control Interface (RTCI) outputs timing infor-
mation for a NTSC/PAL encoder as BT.656 ancillary data.
This allows the encoder to generate “clean” output video.
RTCI information via BT.656 ancillary data is shown in Table
8. If enabled, this transfer occurs once per line and is com-
pleted before the start of the SAV sequence.
NOTES:
40. ep = even parity for P8-P13.
41. CRC = Sum of P8-P14 of Data ID through last user data word. Preset to all zeros, carry is ignored.
Data Block Number
Data Word Count
PIXEL INPUT
Increment
Increment
Preamble
FSCPLL
Data ID
HPLL
CRC
TABLE 8. OUTPUTTING RTCI AS BT.656 ANCILLARY DATA
P15
P14
P14
P14
P14
P14
P14
P14
P14
P14
P14
P14
P14
0
1
1
bit 6
P14
ep
ep
ep
ep
ep
ep
ep
ep
ep
ep
ep
0
1
1
HMP8115
F2 = 0
PSW
bit 5
P13
20
0
1
1
1
0
0
0
0
0
0
0
0
The PSW bit is always a “0” for NTSC encoding. During PAL
encoding, it indicates the sign of V (“0” = negative; “1” = pos-
itive) for that scan line.
F1 = 0
bit 4
P12
0
1
1
1
0
0
0
0
0
0
0
0
0
:
bit 31
bit 27
bit 7
bit 3
bit 3
P11
0
1
1
0
0
0
0
0
0
0
bit 30
bit 26
P10
bit 6
bit 2
bit 2
0
1
1
1
0
0
0
0
0
0
bit 29
bit 25
bit 5
bit 1
bit 1
P9
0
1
1
0
0
1
0
0
0
0
bit 28
bit 24
bit 4
bit 0
bit 0
P8
0
1
1
1
1
1
0
0
0
0