p87c770aar NXP Semiconductors, p87c770aar Datasheet - Page 52

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

Philips Semiconductors
18.9
All registers are read/writeable. When the registers are read a value will be returned that will correspond to the written
data. There is one exception; when the Status Register is read, status information will be returned.
18.9.1
Table 75 Display Control Register (address 87F0H)
Table 76 Description of DCR bits
18.9.2
Table 77 Text Vertical Position Register (address 87F1H)
Table 78 Description of TVPR bits
1999 Jun 11
Microcontrollers for NTSC TVs with On-Screen
Display (OSD) and Closed Caption (CC)
SRC3
VPOL
BIT
BIT
7
7
6
5
4
3
2
1
0
7
7
6
5
4
3
2
1
0
Register descriptions
D
T
EXT
ISPLAY
V
ERTICAL
SYMBOL
SYMBOL
C
MOD1
MOD0
ONTROL
SRC2
SCR3
SCR2
SCR1
SCR0
HPOL
VPOL
HPOL
VOL5
VOL4
VOL3
VOL2
VOL1
VOL0
MSH
FLF
6
6
P
OSITION
R
EGISTER
Screen colour. These 4 bits select the screen colour; one of 16 colours may be
selected; see Table 59.
Flash frequency. The state of this bit determines the flash frequency of the screen.
A frequency of 1 or 2 Hz can be selected; see Table 60.
Meshing. If MSH = 1, meshing is selected. See Section 18.2.12.
Display modes. These 2 bits select one of the four display modes: Video mode, Full
Text mode, Mixed Screen mode and Mixed Video mode; see Table 56.
Vertical sync polarity. The state of this bit determines whether the vertical sync input is
inverted or not; see Table 74.
Horizontal sync polarity. The state of this bit determines whether the horizontal sync
input is inverted or not; see Table 74.
Vertical offset. These 6 bits select the number of lines that the text area is offset
vertically; see Table 72.
R
SRC1
VOL5
EGISTER
5
5
(DCR)
(TVPR)
SRC0
VOL4
4
4
52
VOL3
FLF
3
3
DESCRIPTION
DESCRIPTION
VOL2
MSH
2
P8xCx70 family
MOD1
VOL1
1
1
Product specification
MOD0
VOL0
B0
0