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参数资料
| 型号： | ST7LNB1Y0M6 |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 8-BIT, EEPROM, 8 MHz, MICROCONTROLLER, PDSO16 |
| 封装： | 0.150 INCH, PLASTIC, SOP-16 |
| 文件页数： | 4/36页 |
| 文件大小： | 536K |
| 代理商： | ST7LNB1Y0M6 |
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Functional description
ST7LNB1Y0
3.2.1
Command signalling
In order to be detected, the DiSEqC-ST commands must be sent after a voltage change
from 13 to 18 V. A delay time, t, between 4 ms and 24 ms must be respected before sending
the DiSEqC-ST commands (see Figure 8).
Figure 8.
Signalling of the DiSEqC-ST command
Table 7.
ODU_SaTCR_Inst(5Bh)
Sub-command
DATA1
DATA2
Command Description
7 6
5
4 32 10
ODU_Config(1)
SaTCR
0 00 01
AppliNum(2)
This command is sent by an RTA-STB in order
to determine the ST7LNB1Y0 application
number.
ODU_Lofreq(3)
SaTCR
0 00 10 LOfreqNum(4)
This command is sent by the RTA-STB in
order to determine the L.O frequencies
present in the LNB.
ODU_SaTCRxSignalOn
xx
00
xxh
When receiving this command the
ST7LNB1Y0 commands all the SaTCRs to
send a tone in order to indicate their
respective BPF center frequencies.
1.
ODU_Config: When receiving this command the ST7LNB1Y0 checks if the Polonium indicated in data1 corresponds to the
ST7LNB1Y0 application number, if it is the case the ST7LNB1Y0 commands SaTCR indicated in data1 to send a tone
having as frequency F = FbpfSaTCR else F = FbpfSaTCR + 20 MHz.
2.
AppliNum: application number [1 to FFh] (refer toTable 11).
3.
ODU_Lofreq: When receiving this command the ST7LNB1Y0 checks if the LOfreqNum indicated in data1 corresponds to
the one of the L.Os present in the application, if it is the case the ST7LNB1Y0 commands SaTCR indicated in data1 to
send a tone having as frequency F = FbpfSaTCR else F = FbpfSaTCR + 20 MHz.
4.
LofreqNum: Local oscillator table entry number [1 to FFh] (refer to Table 10).
Table 8.
DiSEqC-ST command examples
LNB
DiSEqC Frame
Description
ODU_Config
E0 00 5B 01 02
The STB asks if the application number is 2, the reply tone is
expected from SaTCR1.
ODU_Lofreq
E0 10 5B 42 04
The STB asks if the LO frequency number 4 is present on the
LNB, the reply tone is expected from SaTCR3.
ODU_Change_Channel
E0 00 5A 24 55
The STB asks for a channel_change on SaTCR2 with a Tuning =
055h from matrix RF input = Feed1.
13 V
18 V
DiSEqC-ST Frame
24 ms
≥ t ≥ 4 ms
~ 1ms
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