Z86129 Datasheet, PDF (37/50 Pages) Zilog, Inc. – NTSC LINE 21 DECIDER

PRELIMINARY
Z86129/130/131
NTSC Line 21 Decoder
Note: In this product specification one and two byte _{Sample OSD Program}
commands are written as one or two, two-digit Hex values,
separated by a comma, within curly braces. For example,
the WRITE CHAR command for entering the letter A as a
OSD Commands
Function
1
single width character would be shown in this document as
{33}
*Select POP mode. Sets up the
{A3,41}. This command would write the letter A to the
Z86129
internal
memory
current cursor position of the display row being addressed.
organization to support POP mode.
Refer to Serial Communications Interface and Commands
The first block of cmds will display >
sections for further details of the serial communications
VIDEO in double wide chars. Each
and the OSD commands.
character is entered with the
WRITE CHARD cmd.
The one byte commands provide a simple means of
{A0,02}
*Select POPROW 2, cursor at
creating OSD displays using preset screen formats built
character column1
into the part. These built-in modes provide the user with a
simple way to generate OSD screens. Two preset display
modes are available called POPSET and TEXTSET.
{A2,00}
{A3,08}
*move cursor to 0
*PAC for RED chars written in PAC
location.
Using Popset
POPSET provides an OSD mode that operates in a
fashion similar to the Caption Pop-on mode. The POPSET
command organizes the memory into two eight row blocks,
one visible on screen and the other off screen. An OSD
screen can then be created by loading the off screen
memory by the command sequence POP ROW SEL,
WRITE CHAR .. WRITE CHAR .. POP ROW SEL ..
WRITE CHAR .. WRITE CHAR. The data can then be
presented for on-screen display with the FLIP command.
The following is an example of a command sequence that
will create an OSD screen using the POPSET mode. It
creates a typical menu screen used in television receivers.
It should be noted that in this document commands are
written as either a one, or two byte HEX value, separated
by a comma, within curly braces (i.e., a sample two-byte
OSD command: {A1,00}).
{A5,3e}
{A3,02}
{A5,56}
{A5,49}
{A5,44}
{A5,45}
{A5,4f}
{A0,04}
{A2,03}
{A3,02}
{A5,41}
*Double wide char “>” will display in
char col 1 & 2
*Green mid code written to char col
3
*"V" written to char col 4 & 5.
*"I"
*"D"
*"E"
*"O"
*The next block of cmds will display
AUDIO in row 4 double width.
*select poprow 4, cursor in char col
1
*cursor to char col 3
*Green mid code written to char col
3
*"A" written to char col 4 & 5.
Note: In the sample program below, a comment field is
written following the command to describe the action of the
command or sequence of commands, where appropriate.
The comment field is identified by an asterisk (*) and any
text following the * will be taken as a “comment” in the
examples that follow.
{A5,55}
*"U"
[A5,44]
*"D"
[A5,49]
*"I"
Notes:
*The next set of commands will display the word “TIME” in row
6 with double-wide characters. Spacing is obtained without the
A2 Cursor Set command to illustrate an alternate means of col-
umn alignment.
DS96TEL0200
37