參數(shù)資料
型號(hào)： HDM8515
廠(chǎng)商： HYNIX SEMICONDUCTOR INC
元件分類(lèi)： 通信及網(wǎng)絡(luò)
英文描述： ANALOG IC - DATASHEET REFERENCE
中文描述： SPECIALTY TELECOM CIRCUIT, PQFP100
封裝： LQFP-100
文件頁(yè)數(shù)： 36/75頁(yè)
文件大?。?/td> 272K
代理商： HDM8515
36
3.9 DiSEqC Interface
The DiSEqC system is a communication bus between satellite receivers and satellite peripheral
equipment, using only the existing coaxial cable.
1.1 DiSEqC mode
According to the value of DiSEqC_mode of 0x31 register, DiSEqC mode can be changed
0: 22KHz tone off
1: 22KHz tone on
2: Burst mode - on for 12.5ms =’0’
3: Burst mode - modulated 1:2 for 12.5ms =’1’
4: Modulated with bytes from DiSEqC instruction
1.2 DiSEqC instruction
Up to eight instruction data bytes are loaded into a bank of registers(0x29 -0x30). I2C
automatic
register address incrementing is turn on. The number of bytes in the DiSEqC instruction must
be defined in the DiSEqC_length of 0x31 register.
When the DiSEqC instruction data bytes have been loaded, set DiSEqC_mode of 0x31 register.
At the same time, program DiSEqC_length of 0x31 register. The instruction data is modulated
onto
22KHz signal and output from the DISEQC pin.
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