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| 型號(hào)： | LC89057W-VF4 |
| 元件分類： | 消費(fèi)家電 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PQFP48 |
| 封裝： | 7 X 7 MM, SQFP-48 |
| 文件頁數(shù)： | 5/61頁 |
| 文件大?。?/td> | 570K |
| 代理商： | LC89057W-VF4 |
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LC89057W-VF4
No.7202-13/61
9.1.3 Oscillation amplifiers (XIN, XOUT, MCK)
The LC89057W-VF4 features a built-in oscillation amplifier. An oscillation circuit can be configured by connecting a
quarts resonator, feedback resistor, and load capacitance to XIN and XOUT. When connecting a quarts resonator, use
one with a fundamental wave. Be aware that the load capacitance depends on the quarts resonator characteristics.
If the built-in oscillation amplifier is not used and oscillation module is used as the clock source instead, connect the
output of an external clock supply source to XIN. At this time, it is not necessary to connect a feedback resistor
between XIN and XOUT.
Supply XIN with the 12.288MHz or 24.576MHz-clock set with XINSEL. If inputting other frequencies to XIN, the
result of change in sampling frequency fs of input data must not be reflected to an error flag. By this setting, the
operation functions properly. However, since time definition gap occurs in relation to the operation with
recommended frequency, the encoding result cannot be used for input fs calculations. In this case, the input fs can be
calculated by dividing decimally the calculation count value with 1/2000th of the XIN input frequency. For details,
see Chapter 10. Microcontroller Interface.
Since the XIN clock serves as the reference for internal processing, complete the XINSEL setting prior to bi-phase
data input.
Supply XIN with clocks all the time to be used in the following applications.
(1) Detection whether or not bi-phase data is input
(2) Clock source during PLL is unlocked
(3) Calculation of input data sampling frequency
(4) Time definition during input data is switching
(5) External source of supply clock (clock for a AD converter, etc.) at the time of XIN source.
The oscillation amplifier automatically stops while PLL is locked. However, it can be also set for continuous
operation with AMPOPR[1:0]. In the continuous operation mode, data detection and calculation of input sampling
frequency become possible while the PLL is locked. In that case, both the oscillator amplifier clock and the PLL
clock signals coexist, and then users must pay attention and make sure audio quality is not adversely affected.
If the oscillation amplifier is set to continuous operation with AMPOPR[1:0] while PLL is locked, RERR outputs an
error ("H") once. When oscillation amplifier is switched to a operation state, fs calculation value maintained during a
stop state is reset at the same time. This process regarded as an error, since fs seems to change. This error has no
influence on clock output, but RDATA is muted during this error. Therefore, setting of the AMPOPR[1:0] must be
completed either prior to bi-phase data input or while PLL is unlocked.
The oscillation amplifier can be stopped if it is unnecessary. However, when the normal operation is resumed, it must
wait for 10ms or longer until the resonator oscillation gets stable.
XMCK outputs the XIN clock. The XMCK output is set with XMSEL[1:0]. The XIN clock can be set to 1/1, 1/2, and
muted output.
When only the modulation function is used, no clock needs to be supplied to XIN. In this case, the built-in oscillation
amplifier and frequency divider can be also used for MCK, BCK, and LRCK clock generation. If you use only the
oscillation amplifier, input the quarts resonator to XIN and XOUT or an external clock to XIN, and fix the electric
potential of digital data input pins of RX0 to RX6. At this time, do not set to stop the demodulation operation with
RXOPR and PLLOPR. The output clock may be muted.
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| LC89058W-E | SPECIALTY CONSUMER CIRCUIT, PQFP48 |
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| LC8905V | SPECIALTY CONSUMER CIRCUIT, PDSO24 |
| LC8910 | TRANSMITTER/RECEIVER IC, PDIP24 |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LC89057W-VF4AD-E | 制造商:ON Semiconductor 功能描述: |
| LC89057W-VF4A-E | 功能描述:音頻發(fā)送器、接收器、收發(fā)器 RoHS:否 制造商:Cirrus Logic 工作電源電壓:3.3 V, 5 V 電源電流:11.8 mA 通道數(shù)量:1 最大工作溫度:+ 70 C 接口類型:I2C, SPI 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TSSOP-28 封裝: |
| LC89057W-VF4A-TBM-E | 制造商:ON Semiconductor 功能描述: 制造商:ON Semiconductor 功能描述:AUDIO I/F RECEIVER |
| LC89058W | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:CMOS IC Digital Audio Interface Receiver |
| LC89058WA-E | 功能描述:音頻發(fā)送器、接收器、收發(fā)器 RoHS:否 制造商:Cirrus Logic 工作電源電壓:3.3 V, 5 V 電源電流:11.8 mA 通道數(shù)量:1 最大工作溫度:+ 70 C 接口類型:I2C, SPI 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TSSOP-28 封裝: |
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