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參數資料
型號: LC89057W-VF4-E
元件分類: 消費家電
英文描述: SPECIALTY CONSUMER CIRCUIT, PQFP48
封裝: 7 X 7 MM, SQFP-48
文件頁數: 24/61頁
文件大小: 355K
代理商: LC89057W-VF4-E
LC89057W-VF4-E
No. 7202-30/61
9 Description of Modulation Function and General-Purpose I/Os
9.1 Modulation function usage method
9.1.1 Initial setting
The modulation function and general-purpose I/O port function cannot be used simultaneously because they share
the same pins. To select the modulation function, pull down INT with a 10k resistor. For the setting method, see
Chapter 7.
In the initial setting, the modulation function is stopped. The setting to use the modulation function is performed
with TXOPR.
9.1.2 Data output (TMCK, TBCK, TLRCK, TDATA, TXO)
Bi-phase modulated data is output from TXO by inputting a 256fs clock to TMCK, 64fs clock to TBCK, fs clock to
TLRCK, and audio data to TDATA.
The polarity of the TLRCK clock is set with TXLRP.
Input data can be modulated in the sampling range of 32kHz to 192kHz, transfer rate of 4MHz to 25MHz, and up to
24 bit data.
The initial value for the input data format is I2S. Switching to MSB-first front-loading input is set with TXDFS.
For the channel status, the first 48 bits of data can be written with the microcontroller interface.
TXO is fixed to "L" by setting TXOPR to Stop.
MSB
LSB
MSB
LSB
max. 24 bit
L-ch
R-ch
MSB
LSB
MSB
LSB
max. 24 bit
L-ch
R-ch
TLRCK (I)
TBCK (I)
TDATA (I)
TLRCK (I)
TBCK (I)
TDATA (I)
(1) MSB first front-loading data input
(0) I2S data input
Figure 9.1. Data Input Timing
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