Philips Semiconductors
Product specification
9-bit video input processor
SAA7113H
8.10 Digital output port VPO7 to VPO0
The 8-bit VPO-bus can carry 16 data types in three different formats, selectable by the control registers LCR2 to LCR24
(see also Chapter 15, subaddresses 41H to 57H).
Table 4 VPO-bus data formats and types
NUMBER OF VALID
BYTES SENT PER
LINE
DATA TYPE
NUMBER
DATA
FORMAT
DATA TYPE
teletext EuroWST, CCST
NAME
WST625
0
1
sliced
88
sliced
sliced
sliced
sliced
sliced
European closed caption
VPS
CC625
VPS
8
2
56
3
Wide screen signalling bits
US teletext (WST)
WSS
32
4
WST525
CC525
test line
intercast
general text
VITC625
VITC625
−
72
5
US closed caption (line 21)
8
6
YUV 4 : 2 : 2 video component signal, VBI region
1440
7
raw
oversampled CVBS data
teletext
programmable
8
sliced
sliced
sliced
reserved
sliced
sliced
sliced
88
26
9
VITC/EBU time codes (Europe)
VITC/SMPTE time codes (USA)
reserved
10
11
12
13
14
15
26
−
US NABTS
NABTS
Japtext
JFS
72
MOJI (Japanese)
74
Japanese format switch (L20/22)
56
YUV 4 : 2 : 2 video component signal, active video region active video
1440
Note
1. The number of valid bytes per line can be less for the sliced data format if standard not recognized (wrong standard
or poor input signal).
For each LCR value from 2 to 23 the data type can be
programmed individually. LCR2 to LCR23 refer to line
numbers. The selection in LCR24 values is valid for the
rest of the corresponding field. The upper nibble contains
the value for field 1 (odd), the lower nibble for field 2
(even). The relationship between LCR values and line
numbers can be adjusted via VOFF8 to VOFF0 (located in
subaddresses 5BH, bit 4 and 5AH, bits 7 to 0).
The recommended values are 07H for 50 Hz sources and
0AH for 60 Hz sources, to accommodate line number
conventions as used for PAL, SECAM and
NTSC standards; see Tables 8 to 11.
1999 Jul 01
26
NXP [ NXP ]
