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參數資料
| 型號： | M494 |
| 廠商： | 意法半導體 |
| 英文描述： | SINGLE-CHIP VOLTAGE TUNING SYSTEM WITH 4 ANALOG CONTROLS AND mP INTERFACE |
| 中文描述： | 單片電壓調整系統(tǒng)，4模擬控制和MP接口 |
| 文件頁數： | 11/22頁 |
| 文件大?。?/td> | 223K |
| 代理商： | M494 |
FUNCTIONAL DESCRIPTION
(continued)
Data Input
Shown below are the codes for the commands :
see Table2.
The Data input will accept signals whose timing is
defined in Figure 6 and electrical characteristics
defined in the table of static electrical charac-
teristics. The EOT code must be transmittedafter
each commandafter amin. periodof 112ms.
Band Outputs
Four band outputsare providedfor selection ofthe
signal band:VHF I &III, UHF andCATV. Bandskip
logic is implemented so that by tieing the relevant
pin to V
SS
a band can be skippedin regionsof no
transmission in that band. The bands can be se-
Table 2 :
DataCommands
lected only in a rolling sequence by the band se-
quence keyboard command. The sequence is as
follows : VHF III, UHF, VHF I, CATV.
Multi StandardOutputs
Two coded multi standard outputs(or generalpur-
pose TVsystem flags) are provided so that the TV
set can be designedfor use in areas of more than
one transmission standard. This function requires
an externaldecoderto realise 4differentstandards
e.g. PAL 1, PAL 2, NTSC, SECAM etc. The multi
standard sequence command available from the
keyboard gives a simple binary count at the two
outputs : 00, 01, 10, 11,00 etc. In StandbyandOff
statesthe multistandard outputsare pulled to logic
LO.
Command
Number
Function
Code
D2
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
16 Programs
20 Programs
D0
0
1
1
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
D1
0
0
0
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
D3
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
D4
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
0
1
1
1
1
1
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
EOT
Program 1
Program 2
Program 3
Program 4
Program 5
Program 6
Program 7
Program 8
Program 9
Program 10
Program 11
Program 12
Program 13
Program 14
Program 15
Program 16
Normalise
Volume up
Volume down
Contrastup
Contrastdown
Brightness up
Brightness down
Saturation up
Saturation down
Memory Seq. up.
Memory Seq. down
On/standby (toggle)
Standby
Mute (toggle)
EOT
Program 1
Program 2
Program 3
Program 4
Program 5
Program 6
Program 7
Program 8
Program 9
Program 0
– 10 (decade)
+ 10(decade)
1*
NOP
NOP
NOP
Normalise
Volume up
Volume down
Contrast up
Contrast down
Brightness up
Brightness down
Saturation up
Saturation down
Memory Seq. up.
Memory Seq. down
On/standby (toggle)
Standby
Mute (toggle)
NO TRANSMISSION (pulled up)
The above table shown the difference between the 16 and 20program options with respect to the Data input commands.
Commands 10, 11, 12 & 13 change function between the two options.Commands 14, 15 & 16 should not be used in the 20 program option,
as they have no function.
NOP = No operation.
M494
11/22
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