p87c770aar NXP Semiconductors, p87c770aar Datasheet - Page 43

• Manufacturer Part Number: p87c770aar
• Description: Microcontrollers Ntsc With On-screen Display Closed Caption
• Manufacturer: NXP Semiconductors

Philips Semiconductors
18.3
Character coding is split into character oriented attributes
(parallel) and character group coding (serial). The serial
attributes take effect at the set position and remain
effective until either modified by new serial attributes or
until the end of the row. A serial attribute is represented as
a space (the space character itself however is not used for
this purpose). The attributes are still active, e.g. overline
and underline will be visible.
The default settings at the start of a row are:
18.3.1
Table 54 Parallel character coding
18.3.2
Table 55 Serial character coding
1999 Jun 11
0 to 7
8 to 10
11
0 to 3
4
5
6
7
8
9
10
11
Foreground colour = 0, foreground colour switch = 0
(bank 0)
Background colour = 8
BITS
BITS
Microcontrollers for NTSC TVs with On-Screen
Display (OSD) and Closed Caption (CC)
Character and attribute coding
P
S
ARALLEL CHARACTER CODING
ERIAL CHARACTER CODING
8-bit character code
3 bits for 8 foreground colours
Mode bit: a logic 0 = parallel code
4 bits for 16 background colours 4 bits for 16 background colours
0 = Underline off
1 = Underline on
0 = Overline off
1 = Overline on
Display mode:
0 = Superimpose; 1 = Boxing
0 = Flash off
1 = Flash on
0 = Italics off
1 = Italics on
0 = Fringing off
1 = Fringing on
Switch for Serial coding
Mode 0 and 1: 0 = Mode 0
Mode bit: 1 = Serial code
SERIAL MODE 0 (‘SET AT’)
CHAR. POSITION = 1 (‘SET AT’) CHAR. POSITION >1 (‘SET AFTER’)
Horizontal Size:
0 = normal; 1 = x2
Vertical Size:
0 = normal; 1 = x2
Display mode:
0 = Superimpose; 1 = Boxing
Foreground colour switch
0 = Bank 0 (colours 0 to 7)
1 = Bank 1 (colours 8 to 15)
Background colour duration:
0 = stop BGC
1 = set BGC to end of row
End of Row
0 = Continue Row; 1 = End Row
Switch for Serial coding
Mode 0 and 1: 1 = Mode 1
Mode bit: 1 = Serial code
DESCRIPTION
43
The coding is done in 12-bit words. The codes are stored
sequentially in the display memory.
1x size
Flash off
Overline off
Underline off
Italics off
Display mode = superimpose
Fringing off
Background colour duration = 0
End of Row = 0.
SERIAL MODE 1
4 bits for 16 background colours
0 = Underline off
1 = Underline on
0 = Overline off
1 = Overline on
Display mode:
0 = Superimpose; 1 = Boxing
Foreground colour switch
0 = Bank 0 (colours 0 to 7)
1 = Bank 1 (colours 8 to 15)
Background colour duration (set at):
0 = stop BGC
1 = set BGC to end of row
End of Row (set at):
0 = Continue Row; 1 = End Row
Switch for Serial coding
Mode 0 and 1: 1 = Mode 1
Mode bit: 1 = Serial code
P8xCx70 family
Product specification