SAA5531 Philips Semiconductors, SAA5531 Datasheet - Page 24

• Manufacturer Part Number: SAA5531
• Description: Enhanced TV microcontrollers with On-Screen Display OSD
• Manufacturer: Philips Semiconductors

Philips Semiconductors
2000 Feb 23
M1 to M0
Text Register 0 (TXT0)
X24 POSN
DISPLAY X24
AUTO FRAME
DISABLE HEADER ROLL
DISPLAY STATUS ROW ONLY
DISABLE FRAME
VPS ON
INV ON
Text Register 1 (TXT1)
EXT PKT OFF
8-BIT
ACQ OFF
X26 OFF
FULL FIELD
FIELD POLARITY
H POLARITY
V POLARITY
Text Register 2 (TXT2)
ACQ BANK
REQ3 to REQ0
SC2 to SC0
Text Register 3 (TXT3)
PRD4 to PRD0
Text Register 4 (TXT4)
OSD BANK ENABLE
QUAD WIDTH ENABLE
EAST/WEST
DISABLE DOUBLE HEIGHT
B MESH ENABLE
C MESH ENABLE
TRANS ENABLE
SHADOW ENABLE
Enhanced TV microcontrollers with
On-Screen Display (OSD)
BIT
mode control bits timer/counter 0; M<1:0>
store packet 24 in extension packet memory (logic 0) or page memory (logic 1)
display X24 from page memory (logic 0) or extension packet memory (logic 1)
FRAME output switched off automatically if any video displayed (logic 1)
disable writing of rolling headers and time into memory (logic 1)
display row 24 only (logic 1)
FRAME output always LOW (logic 1)
enable capture of VPS data (logic 1)
enable capture of inventory page in block 8 (logic 1)
disable acquisition of extension packets (logic 1)
disable checking of packets 0 to 24 written into memory (logic 1)
disable writing of data into Display memory (logic 1)
disable automatic processing of X/26 data (logic 1)
acquire data on any TV line (logic 1)
VSYNC pulse in second half of line during even field (logic 1)
HSYNC reference edge is negative going (logic 1)
VSYNC reference edge is negative going (logic 1)
select acquisition Bank 1 (logic 1)
page request
start column of page request
page request data
alternate OSD location available via graphic attribute, additional 32 locations
(logic 1)
enable display of quadruple width characters (logic 1)
eastern language selection of character codes A0H to FFH (logic 1)
disable normal decoding of double height characters (logic 1)
enable meshing of black background (logic 1)
enable meshing of coloured background (logic 1)
display black background as video (logic 1)
display shadow/fringe (default SE black) (logic 1)
00 = 8-bit timer or 8-bit counter with divide-by-32 prescaler
01 = 16-bit time interval or event counter
10 = 8-bit time interval or event counter with automatic reload upon overflow;
reload value stored in TH0
11 = one 8-bit time interval or event counter and one 8-bit time interval counter
24
FUNCTION
Preliminary specification
SAA55xx