Z86230 Datasheet, PDF (26/61 Pages) Zilog, Inc. – ADVANCED VIOLENCE BLOCKING AND NTSC 21 XDS

CONTROL REGISTERS
REGISTERS SUMMARY
D₀–TVS. Selects the television standard. High selects PAL and Low selects NTSC.
The default is NTSC. When PAL is selected, the display defaults to 15 TV scan
lines per display row.
D₁-Res. Reserved
D₂-D₇-Res. Reserved.
6.1.3 XDS Data Activity Register
TABLE 13. XDS DATA ACTIVITY REGISTER (ADDRESS = 04h)
Bit
7
6
5
4
3
2
1
0
res res res res res res XDS res
R/W
R
RR
R
R
R
R
R
D₀-Res. Reserved.
D₁–XDS. Indicates XDS data is being processed. This bit becomes inactive if no
XDS data is received within the previous 16 seconds: High = Active, Low = Inac-
tive. The RESET state is Low.
D₂-D₇-Res. Reserved.
6.1.4 XDS Filter Register
TABLE 14. XDS FILTER REGISTER (ADDRESS = 05h)
Bit
7
6
5
4
3
2
1
0
s₂
s₁ s₀ PUBL MISC CHAN FUTR CURR
R/W
R/W R/W R/W R/W R/W R/W R/W R/W
D₀–CURR. Selects Current Class packets for output through the Serial Control
port when XDS recovery is enabled.
D₁–FUTR. Selects Future Class packets for output through the Serial Control port
when XDS recovery is enabled.
D₂–CHAN. Selects Channel Information Class packets for output through the
Serial Control port when XDS recovery is enabled.
D₃–MISC. Selects Miscellaneous Class packets for output through the Serial Con-
trol port when XDS recovery is enabled.
D₄–PUBL. Selects Public Service Class packets for output through the Serial Con-
trol port when XDS recovery is enabled.
D₅-D₇–s₀–s₂. Selects a set of secondary parameters, tabulated below, to be used in
filtering the XDS data when XDS recovery is enabled.
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Z86230—PRELIMINARY
PS000400-TVC0499