Samsung S5PC100 User Manual page 1669

S5PC100 USER'S MANUAL (REV1.0)
4.3.2 MSB (Left) Justified
MSB-Justified (Left-Justified) format is similar to I2S bus format, except that in MSB-justified format, the
transmitter always sends the MSB of the next word at the same time whenever the I2SLRCLK is changed.
4.3.3 LSB (Right) Justified
LSB-Justified (Right-Justified) format is opposite to the MSB-justified format. In other word, the transferring serial
data is aligned with ending point of I2SLRCLK transition.
Figure 10.3-3 shows the audio serial format of I2S, MSB-justified, and LSB-justified. Note that in this figure, the
word length is 16-bit and I2SLRCLK makes transition every 24 cycle of I2SBCLK (BFS is 48 fs, where fs is
sampling frequency; I2SLRCLK frequency).
LRCLK
BCLK
SD
LRCLK
BCLK
MSB
SD
(1st)
LRCLK
BCLK
SD
LEFT
MSB 2nd
N-1th
(1st) Bit
Bit
LEFT
2nd N-1th
Bit Bit
MSB - Justified
LEFT
1st N-2th
Bit Bit
LSB - Justified
Figure 10.3-3 I2S Audio Serial Data Formats
MSB
(1st)
I 2 S Format ( N = 8 or 16 )
MSB 2nd
(1st) Bit
(Left - Justified ) Format ( N = 8 or 16 )
LSB
(N-1th)
( Right - Justified ) Format
I2S CONTROLLER(2CH)
RIGHT
2nd
N-1th
Bit
Bit
RIGHT
N-1th
Bit
RIGH
T
1st N-2th LSB
Bit Bit (N-1th)
( N = 8 or 16 )
10.3-5