Z86130 ZILOG [Zilog, Inc.], Z86130 Datasheet - Page 30

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

Z86129/130/131
NTSC Line 21 Decoder
INTERNAL REGISTERS (Continued)
D
tabulated below, to be used in filtering the XDS data when
XDS recovery has been enabled.
Notes:
Interrupt Request Register Address = 06h
Figure 25. Interrupt Request Register (Address = 06h)
D
D
ended. This bit will clear in each field a few lines after row
15.
D
currently at the end of a field. This bit will clear in each field
a few lines after row 15.
30
Bit
5
0
1
2
1. Setting this register to 00h turns XDS data recovery off.
2. The Time Information Only selection includes the Time of
3. VCR Information will select TOD, LTZ, Net ID, Local Call
4. Program rating filter available on Z86129 and Z86130
-D
-res. Reserved.
-DLE. Active High, indicating that the data line has
-EOF. Active High, indicating that the video signal is
Secondary Filter
All
Time Information
In Band Only
Program Rating (Note #4)
VCR Information
Reserved
Reserved
Reserved
Setting bits D
the Classes selected as qualified by the Secondary Filter
(bits D
data will be output (even Reserved and Undefined).
Day (TOD) and Local Time Zone (LTZ) packets.
Letters, Impulse Capture, Tape Delay, Composite 2 and
Out of Band Channel Number packets for recovery.
only.
dTXT dCAP
7
R/W
-s
D
Table 13. XDS Secondary Filter Settings
7
0
-s
5
2
R/W
-D
. Selects a set of secondary parameters,
D
7
6
). If Bits D
0
dXDS
R/W
through D
D
5
0
-D
dSCH
R/W
D
4
are all set to 1, all Classes of XDS
4
4
enables XDS data recovery for
dLOK
R/W
D
3
Filter Value (s0:s2)
EOF
D
R
2
0h
1h
2h
3h
4h
5h
6h
7h
DLE
D
R
1
P R E L I M I N A R Y
D
res
R
0
D
LOCK signal has changed. The SS register must be read
to determine the current state.
D
channel activity has occurred. The Line 21 Activity register
must be read in order to determine if the selected data
channel is active.
D
activity has occurred. The Line 21 Activity register must be
read to determine if XDS data is active.
D
caption data channel activity has occurred. The Caption
Activity Register (Address 08h) must be read to determine
exactly which caption channels are now active.
D
data channel activity has occurred. The Caption Activity
Register (Address 08h) must be read to determine exactly
which TEXT channels are now active.
Note: Except as noted for the case of D1 and D2 above,
the master device must write a 1 to the appropriate bit in
the Interrupt Request Register to clear the Interrupt.
Writing a 1 to any valid bit position the Interrupt Request
Register is equivalent to CLEARing a interrupt request on
that bit.
Interrupt Mask Register Address = 07h
This register identifies which activities in the Interrupt
Request Register will be used to cause an interrupt.
Setting a bit to a 1 enables the interrupt when the
corresponding event becomes active. Setting all bits of this
register to zero disables interrupts.
Bit
3
4
5
6
7
Figure 26. Interrupt Mask Register Address = 07h
-dLOK. Active High, indicating that the state of the
-dSCH. Active High, indicating that a change in selected
-dXDS. Active High, indicating that a change in XDS
-dCAP. Active High, indicating that a change in a
-dTXT. Active High, indicating that a change in a TEXT
dTXT
R/W
D
7
dCAP
R/W
D
6
dXDS
R/W
D
5
dSCH
R/W
D
4
dLOK
R/W
D
3
EOF
R/W
D
2
DS96TEL0200
R/W
DLE
D
1
R/W
DAV
D
0