BU9409FV_12 Datasheet, PDF (43/58 Pages) Rohm – 32bit Audio DSP

BU9409FV
Technical Note
5. P-S conversion 1 ,P-S conversion 2
Two parallel serial conversion circuits are built in BU9409FV. (P-S conversion 1, P-S conversion 2)
P-S conversion 1 convert the Main output of DSP from SDATAO1, LRCKO, and BCKO (34,35,36pin) into three line serial
data and output the data.
P-S conversion 2 convert the sub output of DSP from SDATAO1, LRCKO, and BCKO (33,35,36pin) into three line serial data
and output the data.
Output format has the IIS mode, left-align mode, and right-align mode. 16 each bit, 20bit, and 24bit output can also be
selected. The figure below shows the timing chart of each transmission mode.
I_II_ISS_方m_式ode
LRCKO
BCKO
DATAO
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32
MSB
LSB
MSB
LSB
S
S
16bit
20bit
24bit
16bit
20bit
24bit
left-align mode
左詰方式
LRCKO
BCKO 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32
MSB
LSB
MSB
LSB
DATAO S
S
16bit
20bit
24bit
16bit
20bit
24bit
right-align mode
右詰方式
LRCKO
BCKO
DATAO
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32
MSB
LSB
MSB
LSB
S
S
16bit
20bit
24bit
16bit
20bit
24bit
5-1. Format setting of three line serial output
Default = 0
Select Address
P-S conversion 1 &h0D [ 3：2 ]
P-S conversion 2 & h0E [ 3：2 ]
Value
0
1
2
IIS mode
left-align mode
right-align mode
5-2. Setting data bit width of three line serial output
Default = 0
Select Address
P-S conversion 1 &h0D [ 1：0 ]
P-S conversion 2 & h0E [ 1：0 ]
Value
0
1
2
16 bit
20 bit
24 bit
Operating Description
Operating Description
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2012.03 - Rev.A