saa5249 NXP Semiconductors, saa5249 Datasheet - Page 26

• Manufacturer Part Number: saa5249
• Description: Integrated Vip And Teletext With Background Memory Controller Ivt1.1bmcx
• 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 1-23
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 with
Background Memory Controller
boxing function allowed on Row 0
boxing function allowed on Rows 1 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 packet memory (when = 1)
when set to 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 = 1
if a good teletext signal is being received when logic 1
indicated language/ROM variant. For Western European = 11 000
if the input video is a 525 line signal when logic 1
26
2
C-bus, at location pointed to by R9 and
2
Preliminary specification
C-bus
2
C-bus
SAA5249