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參數(shù)資料
| 型號： | Z86131 |
| 廠商： | ZiLOG, Inc. |
| 英文描述： | NTSC LINE 21 DECIDER |
| 中文描述： | NTSC制式線21決勝局 |
| 文件頁數(shù)： | 25/50頁 |
| 文件大?。?/td> | 927K |
| 代理商： | Z86131 |
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Z86129/130/131
NTSC Line 21 Decoder
P R E L I M I N A R Y
DS96TEL0200
25
1
Reading Data From The Z86129/130/131
READ1 = F8h:
Command to read one byte in the SPI mode.
READ2 = F9h:
Command to read two bytes in the SPI mode.
The READx commands do not affect the status of the RDY
bit in the Serial Status (SS) register and can be executed
independent of the RDY status.
In both serial communications modes, the DAV bit in the
SS register indicates when data is available. When the
RD2 bit is Low, DAV is cleared on the rising edge of SCK
at the LSB of the first data byte. When the RD2 bit is High,
DAV is cleared on the rising edge of SCK at the LSB of the
second data byte. The RD2 bit is only valid if DAV is High.
Reading in the I
2
C mode is selected by the R/NW bit in the
Slave Address byte. The first byte after the Slave Address
byte will be SS followed by the data in output buffers A and
B in that order. If the instruction being executed is a one-
byte read, then buffer A contains the read data and buffer
B contains all ones.
Writing to the Z86129/130/131
WRxx = C0h-DFh
The WRITE commands require two bytes to execute. The
first byte is the write command and includes the Z86129
register address (AD00:04) being written. The second byte
will be the data to be written.
OSD Display Mode Commands
OSD commands are one and two byte commands. They
are used to control the loading of data for OSD display and
their presentation to the screen. Normally OSD display
mode uses 15 TV lines per display row to enhance the
screen appearance. The following tables summarize the
single- and two-byte control commands for the
Z86129/130/131 On-Screen Display.
Figure 15. READx-Read x Bytes
(READ1/2 = F8h/F9h)
Bit
1
1
W
W
W
1
7
6
5
4
3
2
1
0
1
0
0
RD2
W
W
W
W
W
1
Figure 16. WRxx-Write Register xx
(WRx = C0h-DFh)
Bit
1
1
W
W
W
0
7
6
5
4
3
2
1
0
AD02 AD01 AD00
W
W
W
W
W
AD03
AD04
Table 11. Single-Byte OSD Display Mode Commands (Z86129 Only)
Command Name
RETURN
CLRE
TEXTSET
POPSET
FLIP
OEDM
OENM
Code
30h
31h
32h
33h
36h
37h
38h
Command Function
Carriage return for OSD when in TEXTSET mode
OSD equivalent of delete to end of row (DER)
Establishes a TEXT type of OSD display
Establishes a pop-on type of OSD display
OSD equivalent of pop-on caption end of caption (EOC)
OSD equivalent of erase displayed memory
OSD equivalent of erase non-displayed memory
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