参数资料
型号: TPA5050RSAT
厂商: TEXAS INSTRUMENTS INC
元件分类: 消费家电
英文描述: SPECIALTY CONSUMER CIRCUIT, PQCC16
封装: 4 X 4 MM, GREEN, PLASTIC, QFN-16
文件页数: 17/21页
文件大小: 784K
代理商: TPA5050RSAT
www.ti.com
Serial Audio Input Ports
th1
tsu1
tsu2
th2
DATA
BCLK
(Input)
LRCLK
(Input)
APPLICATION INFORMATION
AUDIO SERIAL INTERFACE
AUDIO DATA FORMATS AND TIMING
SLOS492B – MAY 2006 – REVISED MAY 2007
over recommended operating conditions (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
fSCLKIN Frequency, BCLK 32 × fs, 48 × fs, 64 × fs
1.024
12.288
MHz
tsu1
Setup time, LRCLK to BCLK rising edge
10
ns
th1
Hold time, LRCLK from BCLK rising edge
10
ns
tsu2
Setup time, DATA to BCLK rising edge
10
ns
th2
Hold time, DATA from BCLK rising edge
10
ns
LRCLK frequency
32
48
192
kHz
BCLK duty cycle
50%
LRCLK duty cycle
50%
BCLK rising edges between LRCLK rising edges
LRCLK duty cycle = 50%
32
64
BCLK edges
Figure 3. Serial Data Interface Timing
The audio serial interface for the TPA5050 consists of a 3-wire synchronous serial port. It includes LRCLK,
BCLK, and DATA. BCLK is the serial audio bit clock, and it is used to clock the serial data present on DATA into
the serial shift register of the audio interface. Serial data is clocked into the TPA5050 on the rising edge of
BCLK. LRCLK is the serial audio left/right word clock. It is used to latch serial data into the internal registers of
the serial audio interface. LRCLK is operated at the sampling frequency, fs. BCLK can be operated at 32 to 64
times the sampling frequency for right-justified, left-justified, and I2S formats. A system clock is not necessary for
the operation of the TPA5050.
The TPA5050 supports industry-standard audio data formats, including right-justified, I2S, and left-justified. The
data formats are shown in Figure 4. Data formats are selected using the I2C interface and register map (see
5
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