SAA5244A Datasheet, PDF (22/32 Pages) NXP Semiconductors – Integrated VIP and teletext decoder IVT1.1

Philips Semiconductors
Integrated VIP and teletext decoder
(IVT1.1)
Product specification
SAA5244A
Table 3 Register map for page requests (R3)
START
COLUMN
0
1
2
3
4
5
6
PRD4
Do care
Magazine
Do care
Page tens
Do care
Page units
Do care
Hours tens
Do care
Hours units
Do care
Minutes tens
Do care
Minutes units
PRD3
PRD2
PRD1
PRD0
HOLD
PT3
PU3
X
HU3
X
MU3
MAG2
PT2
PU2
X
HU2
MT2
MU2
MAG1
PT1
PU1
HT1
HU1
MT1
MU1
MAG0
PT0
PU0
HT0
HU0
MT0
MU0
Notes to Table 3
1. Abbreviations are as for Table 1 except for DO CARE bits.
2. When the DO CARE bit is set to logic 1 this means the corresponding digit is to be taken into account for page
requests. If the DO CARE bit is set to logic 0 the digit is ignored. This allows, for example, ‘normal’ or ‘timed page’
selection.
3. If HOLD is set LOW, the page is held and not updated.
4. Columns auto-increment on successive I²C-bus transmission bytes.
Table 4 Interlace/non-interlace 312/313 line control (T0 and T1)
T1
T0
0
0
0
1
1
0
1
1
RESULT
interlaced 312.5/312.5 lines
non-interlaced 312/313 lines (note 1)
non-interlaced 312/312 lines (note 1)
scan-locked
Note to Table 4
1. Reverts to interlaced mode if a newsflash or subtitle is being displayed.
March 1992
22