BU94601KV_12 Datasheet, PDF (21/70 Pages) Rohm – AAC/WMA/MP3 +SD Memory Card + iPod

BU94601KV BU94603KV BU94604BKV
Datasheet
LRCK
Vol
Tlrck1
Left Channel
Tbck1 Tbck2
BCK
Voh
Vol
Vol
Tda1
DATA
MSB
Figure 19 Timing chart
13. SPDIF format
SPDIF format
Signal name I/O
Function
SPDIF O SPDIF output
-
Remarks
SPDIF output becomes enabled by setting SEL_DOUT terminal to L and setting this condition using the I²C
command.
Figure20 shows the SPDIF digital audio signal output format.
Source code
Synchronous
preamble
Source code(4-31)
SPDIF output
0
34
Synchronous
preamble
all 0
(B pattern)
11 12
LSB
Audio data(16bit)
(M pattern)
(W pattern)
00000000101101
Synchronous
preamble
Figure 20 SPDIF Output Format
27 28 29 30 31
MSB ^{V U C P}
A sub-frame of SPDIF is composed of synchronous preamble, 16-bit audio data, V bit (validity flag), U bit (user
data), C bit (channel status) and P bit (parity bit).
Output rate is fixed to 1X speed.
SPDIF outputs synchronous preamble (source code 0-3) as it is and others (source code 4-31) as bi-phase output.
It outputs L while the operation is stopped.
Synchronous preamble and C bit use 32 frames (≈4.4ms) as one cycle. Table 4. and Table 5 show these formats.
V bit is fixed to L. U bit uses 98 frames (≈13.3ms) as one cycle.
Table 4. Synchronous Preamble Pattern
L0 R0 L1 R1 L2 R2 L3 R3 L4 R4 L5 R5
0B WMWMWMWMWMW
1M W M W M W M W M W M W
::
:
:
:
:
:
:
:
:
:
:
:
31 M W M W M W M W M W M W
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TSZ02201-0V2V0E600010-1-2
2012.07.12 Rev.001