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參數(shù)資料
| 型號(hào)： | MT312 |
| 廠(chǎng)商： | ZARLINK SEMICONDUCTOR INC |
| 元件分類(lèi)： | 消費(fèi)家電 |
| 英文描述： | Satellite Channel Decoder |
| 中文描述： | SPECIALTY CONSUMER CIRCUIT, PQFP80 |
| 封裝： | MQFP-80 |
| 文件頁(yè)數(shù)： | 31/90頁(yè) |
| 文件大?。?/td> | 318K |
| 代理商： | MT312 |
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DiSEqC Control
MT312
31
For this example, the DiSEqC
frequency =
For a 10MHz crystal, the tone frequency range is from 9.8kHz with DISEQC RATIO = 255 to 250kHz with
DISEQC RATIO = 10. A lower value than 10 causes the tone frequency to become unstable, until the DISEQC
RATIO = 0, the default, value giving a 22kHz tone frequency. This range is not guaranteed, the maximum tone
frequency should be used with caution.
= 22kHz.
5.2.3 DiSEqC Instruction (R/W). Register 36 (R/W)
Up to eight instruction data bytes are
fi
rst loaded into a bank of registers through this register. The 2-wire
automatic register address incrementing is turned off during this loading by setting B7: IAI = 1 in RADD,
(register address). The number of bytes (less one) must be de
fi
ned in the DiSEqC
instruction register
DISEQC MODE[5:3].
i.e. DISEQC MODE[5:3] = (number of bytes in the DiSEqC
instruction) - 1
When the DiSEqCTM instruction data bytes have been loaded, set DISEQC MODE[2:0] = 4. At the same time
program DISEQC MODE[5:3] as required. The instruction data is modulated onto the 22kHz signal and output
from the DISEQC[0] pin.
An interrupt is generated 16ms after all the data bytes have been sent and the MT312 then resets DISEQC
MODE[5:0] to zero, see Figure 19 on page 33.
5.2.4 DiSEqC 2 Control 1. Registers 121 (R/W)
B7-6:
MIN TONE PER
Minimum Tone Period.
B7:6
are for controlling (or
fi
ne tuning) the DiSEqC
2 receive algorithm.
B5:
Send extended pulse to the Status pin 52. This is a test or diagnostics bit. If it is set to 1, then the
cleaned up and extended pulse stream is sent to the status pin so that it can be recorded or observed.
B4:
DiSEqC
2 Reset only the DiSEqCTM 2 receive module. Automatically set low again after use.
NAME
ADR
B7
B6
B5
B4
B3
B2
B1
B0
Def
hex
DISEQC INSTR
36
DISEQC Instruction [7:0]
R/W
00
NAME
ADR
B7
B6
B5
B4
B3
B2
B1
B0
Def
hex
DISEQC2
CTRL1
121
DISEQC2 CTRL1[7:0]
R/W
00
B7-6:
MIN TONE PER
00
3.0 * DISEQC RATIO
01
3.125 * DISEQC RATIO
10
2.875 * DISEQC RATIO
11
2.75 * DISEQC RATIO
11E6
4*125
---------------
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| MT3-1203SI | 制造商:VOLGEN 制造商全稱(chēng):VOLGEN 功能描述:3 WATT DC/DC CONVERTER, SIINGLE & MULTIIPLE OUTPUTS |
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| MT3-1212WI | 制造商:VOLGEN 制造商全稱(chēng):VOLGEN 功能描述:3 WATT DC/DC CONVERTER, SIINGLE & MULTIIPLE OUTPUTS |
| MT3-1215WI | 制造商:VOLGEN 制造商全稱(chēng):VOLGEN 功能描述:3 WATT DC/DC CONVERTER, SIINGLE & MULTIIPLE OUTPUTS |
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