參數(shù)資料
型號: Z8613112PSC
廠商: ZILOG INC
元件分類: 消費(fèi)家電
英文描述: Ceramic Multilayer Capacitor; Capacitor Type:General Purpose; Capacitance:0.1uF; Capacitance Tolerance: 10%; Voltage Rating:100VDC; Capacitor Dielectric Material:Multilayer Ceramic; Termination:Axial Leaded RoHS Compliant: Yes
中文描述: SPECIALTY CONSUMER CIRCUIT, PDIP18
封裝: PLASTIC, DIP-18
文件頁數(shù): 35/50頁
文件大?。?/td> 927K
代理商: Z8613112PSC
Z86129/130/131
NTSC Line 21 Decoder
P R E L I M I N A R Y
DS96TEL0200
35
1
ON-SCREEN DISPLAY (Z86129 Only)
OSD Operation
The Z86129 has a fully programmable, general purpose
OSD built in. The user can supply information for display
through the serial port. In addition to all the normal and
extended features of the VBI data display modes, OSD
mode also has available added graphics characters,
Double High and Double Wide characters and the ability to
position the display anywhere on the screen with an
adjustable (vertical) box size. The double-high and double-
wide characters are especially useful for creating OSD
screens for display inside a Picture-in-Picture (PiP)
window. The OSD display mode can use either 13 or 15
lines per row, with box or drop shadow. The default is 15
scan lines per row and drop shadow. Enhanced attributes
are always enabled.
The 15 scan line per row display can only show 13 rows on
screen when in the NTSC mode. Rows 14 and 15 will be
off screen and should not be addressed. In the PAL mode
all rows will be visible.
The 15 scan lines per row mode display can show the full
graphic characters and accented capital letters and
descenders without the potential overlap that would result
from the 13 scan line per row display. If the OSD display
mode is changed to a 13 scan line per row mode, the top
two scan lines of any graphics or accented capital letter will
be “ored” together with the bottom two scan lines from the
row above. In 13 line-drop shadow mode this will also
result in a side shadow effect. Graphics characters should
not be used in the 13 line-drop shadow mode.
OSD Character Set
There are 256 possible addresses in the OSD character
set. Figure 28 shows the address map in the range 00h-
BFh. This portion of the addressable space contains the
control bytes and regular character set. The address map
in the range C0h-FFh is shown in Figure 17.
These addresses are shared by the Extended Character
set and the Graphics Character set. Any particular OSD
screen can use one or the other of these sets of characters
but not both.
The character set in force is controlled by the type of
display mode being invoked. When Drop Shadow is being
used, by default, the Graphics Character set will be
displayed in response to an address in the C0h-FFh range.
However, if a BOX display is used, the Extended
Character set is invoked. In either case the user can switch
to the other set by means of the appropriate command,
GRAPHICS or EXTENDED.
The VIN/INTRO pin serves as the input for a Vertical Pulse
from the TV receiver when V Lock = VIN mode is enabled.
This permits an OSD display even when no video input is
present. If this mode is not required the default state V
Lock = VIDEO should be active and this pin will then carry
the INTRO output signal.
OSD Commands
OSD commands are one and two byte commands. They
are used to control the loading of data for OSD display and
their presentation to the screen. Normally OSD display
mode uses 15 TV lines per display row to enhance the
OSD presentation.
The two byte commands enable direct access to any
location on the display screen. The user may construct
displays of his own choosing by using these commands.
Each command byte pair consists of an instruction byte
followed by a data byte. (See the Sample Z86129 OSD
Programs below.)
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