saa5254 NXP Semiconductors, saa5254 Datasheet - Page 18

• Manufacturer Part Number: saa5254
• Description: Integrated Vip And Teletext Decoder Ivt1.1x
• Manufacturer: NXP Semiconductors

Philips Semiconductors
Note
1. These functions have IN and OUT referring to inside and outside the boxing function respectively.
1996 Nov 07
R7 DISPLAY MODE - does not auto-increment
BOX ON 0
BOX ON 1 to 23
BOX ON 24
DOUBLE HEIGHT
BOTTOM HALF
REVEAL ON
CURSOR ON
STATUS TOP
R9 CURSOR ROW - auto-increments to Register 10
R0 to R4
A0
CLEAR MEM
R10 CURSOR COLUMN - auto-increments to Register 11 or 11B
C0 to C5
R11 CURSOR DATA - does not auto-increment
D0 to D7
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
(IVT1.1X)
REGISTER BIT D0 TO D7
Boxing function allowed on Row 0.
Boxing function allowed on Rows1 to 23.
Boxing function allowed on Row 24.
To display double height text.
To select bottom half of page when DOUBLE HEIGHT = 1.
To reveal concealed text.
To display cursor.
Row 25 displayed above or below the main text.
Active row for data written to or read from memory via the I
Selects display memory page (when = 0) or extension memory (when = 1).
When set to logic 1, clears the display memory. This bit is automatically reset.
Active column for data written to or read from memory via the I
Data read from/written to memory via I
R10. 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 logic 1.
If a good teletext signal is being received then logic 1.
Indicated language/ROM variant. For Western European = 11000.
If the input video is a 525 line signal then logic 1.
18
FUNCTION
2
C-bus, at location pointed to by R9 and
2
Preliminary specification
C-bus.
2
C-bus.
SAA5254