ISD94100 Series Technical Reference Manual
Sep 9, 2019
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In MSB justified data format, the MSB is sent and latched on the first clock of an audio channel.
MSB
word N-1
right channel
word N
left channel
word N+1
right channel
I2Sx_BCLK
I2Sx_LRCLK
I2Sx_DI / I2Sx_DO
LSB
MSB
Note:
x: Controller number (x = 1, 2)
Figure 6.14-31 MSB Justified Data Format Timing Diagram
The I2Sx_LRCLK signal also supports PCM mode A and PCM mode B. The I2Sx_LRCLK signal in
PCM mode indicates the beginning of an audio frame.
word N-1
right channel
I2Sx_BCLK
I2Sx_LRCLK
I2Sx_DI / I2Sx_DO
MSB
word N
left channel
word N+1
left channel
LSB
MSB
LSB
MSB
word N
right channel
LSB
Note:
x: Controller number (x = 1, 2)
Figure 6.14-32 PCM Mode A Timing Diagram
word N-1
right channel
I2Sx_BCLK
I2Sx_LRCLK
I2Sx_DI / I2Sx_DO
MSB
word N
left channel
word N+1
left channel
LSB
MSB
LSB
MSB
word N
right channel
LSB
Note:
x: Controller number (x = 1, 2)
Figure 6.14-33 PCM Mode B Timing Diagram
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