 |
поискавой системы для электроныых деталей |
|
|
поискавой системы для электроныых деталей |
|
PCM1741E/2K датащи(PDF) 9 Page - Texas Instruments |
|
|
|||||||||||||||||||||||||||||
PCM1741E/2K датащи(HTML) 9 Page - Texas Instruments |
|
|
9 / 24 page  PCM1741 9 SBAS175 FIGURE 3. Audio Data Input Formats. AUDIO SERIAL INTERFACE The audio serial interface for the PCM1741 is comprised of a 3-wire synchronous serial port. It includes LRCK (pin 3), BCK (pin 1), and DATA (pin 2). BCK is the serial audio bit clock, and is used to clock the serial data present on DATA into the audio interface’s serial shift register. Serial data is clocked into the PCM1741 on the rising edge of BCK. LRCK is the serial audio left/right word clock used to latch serial data into the serial audio interface’s internal registers. Both LRCK and BCK should be synchronous to the system clock. Ideally, it is recommended that LRCK and BCK be derived from the system clock input, SCK. LRCK is operated at the sampling frequency, fS. BCK may be operated at 32, 48, or 64 times the sampling frequency (I2S format except BCK = 32fS). Internal operation of the PCM1741 is synchronized with LRCK. Accordingly, it is held when the sampling rate clock of LRCK is changed or SCK and/or BCK is broken at least for one clock cycle. If SCK, BCK, and LRCK are provided continuously after this hold condition, the internal operation will be resynchronized automatically, less than 3/fS period. In this resynchronize period, and following 3/fS, analog output is forced to the bipolar zero level, or VCC/2. External resetting is not required. AUDIO DATA FORMATS AND TIMING The PCM1741 supports industry-standard audio data formats, including Standard, I2S, and Left-Justified, as shown in Figure 3. Data formats are selected using the format bits, FMT[2:0], in Control Register 20. The default data format is 24-bit left justified. All formats require Binary Two’s Comple- ment, MSB-first audio data. See Figure 4 for a detailed timing diagram of the serial audio interface. 1/f S L-Channel R-Channel LRCK BCK (= 48 or 64f S) 18-Bit Right-Justified DATA DATA (2) I 2S Data Format: L-Channel = LOW, R-Channel = HIGH (3) Left-Justified Data Format: L-Channel = HIGH, R-Channel = LOW (1) Standard Data Format: L-Channel = HIGH, R-Channel = LOW 1/f S L-Channel R-Channel LRCK BCK (= 32, 48 or 64f S) 1 2 3 N-2 N-1 N 1 2 1 2 3 N-2 N-1 N 1/f S L-Channel R-Channel LRCK BCK (= 32, 48 or 64f S) 2 1 1 2 3 N-2 N-1 N 1 2 3 N-2 N-1 N 14 15 16 16 17 18 18 19 20 14 15 16 12 3 DATA 22 23 24 22 23 24 12 3 DATA 18 19 20 1 23 DATA 16 17 18 1 23 DATA 24-Bit Right-Justified 14 15 16 12 3 22 23 24 12 3 18 19 20 1 23 17 18 1 2 20-Bit Right-Justified LSB MSB LSB MSB LSB MSB LSB MSB LSB MSB LSB MSB LSB MSB LSB MSB LSB MSB LSB MSB LSB MSB LSB MSB 14 15 16 14 15 16 12 3 DATA 16-Bit Right-Justified, BCK = 32f S 14 15 16 12 3 LSB MSB LSB MSB 16-Bit Right-Justified, BCK = 48f S or 64fS |
|
|
ссылки URL |
| Вашему бизинису помогли Аллдатащит? [ DONATE ] |
Что такое Аллдатащит | реклама | контакт | Конфиденциальность | Ссылка на техническое описание | обмен ссыками | поиск по производителю All Rights Reserved©Alldatasheet.com |
| Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
|
Family Site : ic2ic.com |
icmetro.com |
Russian ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
