saa5244a NXP Semiconductors, saa5244a Datasheet - Page 21

• Manufacturer Part Number: saa5244a
• Description: Integrated Teletext Decoder Ivt1.1
• Manufacturer: NXP Semiconductors

Philips Semiconductors
March 1992
R9 CURSOR ROW - auto increments to Register 10
R0 to R4
A0
CLEAR MEM.
SUPPL. BLAST
R10 CURSOR COLUMN - auto increments to Register 11 or 11B
C0 to C5
SUPPL. ROW 0
SUPPL. ROW 24
R11 CURSOR DATA - does not auto increment
D0 to D6
R11B DEVICE STATUS - does not auto increment
VCS SIGNAL
QUALITY
TEXT SIGNAL
QUALITY
ROM VER R0 to
R4
625/525 SYNC
Integrated VIP and teletext decoder
(IVT1.1)
Active row for data written to or read from memory via the I
Selects display memory page (when = 0) or extension packet memory (when = 1)
When set to 1, clears the display memory.
This bit is automatically reset
When set to 1, column 4b and 5b (of Table 6) are mapped into 4 and 5 respectively, replacing
blast-through alphanumerics in graphics mode
Active column for data written to or read from memory via the I
When set to 1, column 4b and 5b (of Table 6) are mapped into columns 6 and 7 respectively,
just for row 0 columns 0 to 7
When set to 1, column 4b and 5b (of Table 6) are mapped into columns 6 and 7 respectively
just for row 24
Data read from/written to memory via I
This location automatically increments each time R11 is accessed
Indicates that the video signal quality is good and PLL is phase locked to input video when = 1
If a good teletext signal is being received when = 1
Indicated language/ROM variant. For Western European = 01000
If the input video is a 525 line signal when = 1
21
2
C, at location pointed to by R9 and R10.
2
C-bus
2
C-bus
Product specification
SAA5244A