Z86130 ZILOG [Zilog, Inc.], Z86130 Datasheet - Page 45

• Manufacturer Part Number: Z86130
• Description: NTSC LINE 21 DECIDER
• Manufacturer: ZILOG [Zilog, Inc.]

General Commands
Caption/text Display Mode Commands
CPTX = 10h-1Fh. Caption and Text display mode
commands. These commands select the desired Line 21
data stream (Closed Caption or Text) for display. See the
Commands section for a complete description of the
CPTX Display Mode command.
Caption and Text display commands are one byte
commands. A data channel can be selected for display
with the display either enabled (DEC ON) or disabled
(DEC OFF). All these commands will turn off an active
XDS display mode. The following table summarizes the
device’s Caption and Text display modes and the proper
command code to activate them
XDS Display Mode and 16 Second Erase Tim-
er Commands
XDS DISP = 20h-27h. XDS Display commands are one
byte commands. These commands control the selection of
XDS display modes and the state of the 16 Second Erase
Timer. The 16 Second Erase Timer is active only for
DS96TEL0200
Bit
Command
R/W
CM7 CM6
CPTX
0
CC1
CC2
CC3
CC4
T1
T2
T3
T4
Figure 29. CPTX - Caption/Text Display
Serial Cmd
RESET
R/W
NOP
SSB
0
CM5
R/W
0
(CPTX = 10h-1Fh)
Decoder ON
CM4
CPTX Command Code
1Fh
1Dh
1Bh
17h
15h
13h
11h
19h
R/W
1
CM3
R/W
FLD
FFh,...FFh,FEh
FBh, FCh, 00h
Cmd Code
LANG CPTX DONOF
CM2
R/W
Decoder OFF
00h
CM1
R/W
1Ch
1Eh
16h
14h
12h
10h
1A
18
P R E L I M I N A R Y
CM0
R/W
Caption and XDS display modes. The 16 Second Erase
Timer has no affect on TEXT mode displays.
Note: Changing the ON/OFF state of the 16 Second Erase Tim-
er has no affect on the current display mode in operation.
SCRIPTI Program
This program is designed to send any number of one or
two byte commands to the Z86129. The list of commands
to be executed are contained in Script files that have the
extension.SER. Examples of such files will be presented in
the following paragraphs. SCRIPTI can be used to control
the display modes in the same manner as the IICO
program except that the one byte command to be sent
must be in a Script file. For example a file called CC1.SER
would contain the one byte command:
The program is invoked by typing:
SI File_name<ENTER>
Note: File_name without the .SER extension
The screen will display:
The responding slave address is reported to the screen.
When all the commands in the file have been successfully
sent to the Z86129, the PC will return to the system
prompt.
The program checks the RDY status before sending each
byte. If, during the entry of a command, the RDY bit is not
found to be a "one" after an extended wait, the program will
report the contents of the SS register and then continue
checking for RDY.
ERASE TIMER
XDS Display
16 SECOND
{17}* send CC1, decoder ON
Command
EEG CCD2 Serial Interface Script Player Version x.xx
Slave Address is 28h
Script File Done
XDSG
XDSF
16 Sec Tmr ON
XDS Display Command Code
23h
21h
20h
NTSC Line 21 Decoder
16 Sec Tmr OFF
Z86129/130/131
27h
25h
24h
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