BU94601KV_12 Datasheet, PDF (20/70 Pages) Rohm – AAC/WMA/MP3 +SD Memory Card + iPod

BU94601KV BU94603KV BU94604BKV
Datasheet
SDA
t_BUF
t_F
t_LOW
t_R
SCL
t_HD;STA
t_HD;DAT
P
S
t_HIGH
t_SU;DAT
t_SU;STO
P
Figure 15 Timing chart
12. I²S format
I²S format
Signal name I/O
Function
Remarks
LRCK O I²S Bit clock output (fs=44.1kHz) -
BCK
O I²S Bit clock output
-
DATA
O I²S data output
-
This is digital audio interface terminal. By inputting L to SEL_DOUT terminal, the interface terminal becomes
enabled. When selecting the I²S digital audio output, the output format varies depending on MODE. MODE2
allows you to select 32fs, 48fs or 64fs. *See Chapter 4.
Figures 16, 17 and 18 show the I²S format to be output.
LRCK
BCK(32fs)
DATA
LRCK
BCK(48fs)
DATA
LRCK
BCK(64fs)
DATA
Left Channel
Right Channel
1 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 15
Figure 16 I²S Output Timing (32fs)
Left Channel
Right Channel
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Figure 17 I²S Output Timing (48fs)
Left Channel
15 14
Right Channel
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Figure 18 I²S Output Timing (64fs)
15 14 13 12
12.1 I²S Timing
48fs I²S format (Unless specified, Ta=25℃, VDD1=3.3V, Load : 20pF)
Parameter
Symbol
Min
BCK Clock Frequency
BCK Low time
BCK High time
LRCK Clock Frequency
LRCK Output delay
DATA Output delay
Output High Voltage
Output Low Voltage
Tbck
Tbck1
Tbck2
Tlrck
Tlrck1
Tda1
Voh
Vol
-
216
216
-
-20
-20
VDD1-0.4
-
Typ
472.4
236
236
44.1
0
0
-
-
Max
unit
-
ns
-
ns
-
ns
-
kHz
20
ns
20
ns
-
V
0.4
V
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TSZ02201-0V2V0E600010-1-2
2012.07.12 Rev.001