z86131 ZiLOG Semiconductor, z86131 Datasheet - Page 40

• Manufacturer Part Number: z86131
• Description: Ntsc Line 21 Decoder
• Manufacturer: ZiLOG Semiconductor

Z86129/130/131
NTSC Line 21 Decoder
Z86129/130/131 COMMANDS AND REGISTER SUMMARY (OSD AND CCD COMMANDS FOR
Z86129 ONLY)
Note: As discussed, some registers are not available in
40
Command
Name
RESET
NOP
SSB
CPTX
DISP
RDS1
RDS2
READ1
READ2
WRxx
Z86129/130/131 for non-OSD features in Z86130/131,
V-chip-specific features in Z86130, and Time extraction
feature only in Z86131.
Command
Code
FBh,FCh,00h
00h
FFh,...Fh,FEh Serial Sync Bytes are used in SPI mode only. This command actually consists of a
10hÐ1Fh
20hÐ28h
40hÐ47h
60hÐ66h
F8h
F9h
C0hÐDFh, XXh The WRITE commands require two bytes to execute. The Þrst byte is the write com-
Table 24. Z86129/130/131 Summary of Control Commands
Function
RESET is a three-byte command sequence in SPI or I
establishes all the speciÞed default settings in the device, but it does not reset the
serial port itself. This sequence can be entered without RDY being set.
NOP is a one-byte command for use in SPI or I
affect the status of the RDY bit in the Serial Status (SS) register and can be executed
independent of the RDY status.
string of single-byte commands in the form FFh,....FFh,FEh. SPI mode communica-
tions can be synchronized by sending a synchronizing data string to the part. This
string should consist of at least two SSB bytes of FFh followed by one SSB byte of
FEh. At the end of the FEh byte the port is ready for use.
Selects a Closed Caption (CC1ÐCC4) or TEXT (T1ÐT4) data channel for processing or
display.
Selects a preprogrammed XDS screen template for display, with or without 16 Second
Erase timer enabled.
RDS1 is a one-byte command used to initiate a one byte read sequence by moving the
contents of the register identiÞed by the address Þeld (AD00:02) of the command to
the output register. Addresses 0hÐ7h are valid in the RDS1 command Þeld AD00:02.
RDS2 is a one-byte command which is used to initiate a two-byte read sequence by
moving the contents of the two consecutive registers, starting with the one identiÞed by
the address portion of the command (AD00:AD02), to the output registers and setting
the RD2 bit in the SS register. Only Addresses 0hÐ6h are valid in the RDS2 command
Þeld AD00:02.
Command to read one byte in the SPI mode.
Command to read two bytes in the SPI mode.
mand and includes the Z86129/130/131 register address (AD00:04) being written. The
second byte (XXh) is the data to be written.
P R E L I M I N A R Y
2
C mode. The NOP command does not
2
C mode. The RESET command
DS007200-TVX0199
ZiLOG