z86229 ZiLOG Semiconductor, z86229 Datasheet - Page 20

• Manufacturer Part Number: z86229
• Description: Z86229 Ntsc Line 21 Ccd Decoder
• Manufacturer: ZiLOG Semiconductor

<      ( ' # 6 7 4 ' 5 ' 6
I
device. I
and the SEN pin High. SEN must remain High whenever
I
the SMS also Low, the part is reset. SDA and SCK are the
data and clock lines of the I
mode operation, the V
figured to generate interrupt requests to the master device
on selected events (see
SPI Mode.
High. In SPI mode, the Z86229 acts as a slave device. All
communications are clocked in and out as 8-bit bytes. SCK
is the serial clock (input), SDA is Data-In, and SDO is Data-
Out. The SEN pin enables communication when High.
When Low, the SDO pin is tri-stated.
When SEN is brought High, the part is synchronized and
waiting for a Command. If SEN is tied High, the part can
also be synchronized by a command string. During SPI
mode operation, the V
figured to generate interrupt requests to the master device
on selected events
Caution:
Interrupt Generation.
be configured to provide an interrupt output on selected
events. The configuration of V
programmable to be either:
Notes:
SMS = Serial Mode Select High = SPI and Low = I
SCK = Serial port clock for either Serial Mode.
SDA = Serial port data for I
SDO = Serial Data Out for SPI Mode. Not used in I
SEN = SPI Mode Enable signal. Must be High for I
2
2

C Mode.
C mode is required. If the SEN pin is brought Low, with
2
When the SEN and SMS pins are made Low simulta-
neously, the part is reset.
Table 7. Z86229 Serial Control Signals
C Mode is selected by bringing the SMS pin Low
The I
SPI Mode is selected by making the SMS pin
2
C port on the Z86229 always acts as a slave
IN
IN
The V
Note
/INTRO signal (pin 13), can be con-
/INTRO signal (pin 13) can be con-
2
C Mode and Data In for SPI Mode.
2
C port, respectively. During I
IN
paragraph page 22).
/INTRO signal (pin 13) can
% Q P V K P W G F
IN
/INTRO (pin 13) is user
2
2
2
C.
C Mode.
C Mode.
2
C
1. An INPUT pin for acceptance of an external VSYNC
2. An OUTPUT pin for interrupt generation on selected
Note:
Setup and Operational Control
The Z86229 is extremely flexible and fully programmable
through its serial communication port. The following tables
provide a
Selectable Display Modes, and Default Conditions upon
Reset.
Z86229 Programmable Features
•
•
•
•
•
•
•
•
•
•
•
•
In addition to the programmable features just listed, the
Z86229 offers a choice of eleven display modes for user se-
lection.
timing signal.
events.
Decoder ON/OFF
TV scan lines per OSD row (13 or 15 lines)
EIA–608 extended attributes ON/OFF
OSD drop shadow ON/OFF
Color/Monochrome
OSD Horizontal start position
Text box size (# of rows)
Text box starting row position
NTSC or PAL
Vertical Lock Source: Video or External V
XDS Data Output, Raw or Filtered
H-lock Source: Video or External HIN
Configuring
ation is particularly useful when implementing the Pro-
gram Blocking feature with the Z86229 in TVs and
VCRs. In this configuration, Pin 13 is used to interrupt the
host processor when the XDS Program Rating data packet
is found. As a result, the host processor is not burdened
with monitoring or filtering the line 21 data stream. The
Z86229 filters the Line 21 data stream for the host proces-
sor, and generates an interrupt only when the required
packet is found.
partial list
V
IN
of User-Programmable Features, User
/INTRO as an output for interrupt gener-
IN
ZiLOG