Philips Semiconductors
Preliminary specification
Stereo audio codec with SPDIF interface
UDA1355H
BIT
SYMBOL
DESCRIPTION
29 to 28 SPDO_BIT[29:28] Clock accuracy. Value indicating the clock accuracy:
00 = level II
01 = level I
10 = level III
11 = reserved
27 to 24 SPDO_BIT[27:24] Sample frequency. Value indicating the sampling frequency:
0000 = 44.1 kHz
0001 = 48 kHz
0010 = 32 kHz
other states = reserved
23 to 20 SPDO_BIT[23:20] Channel number. Value indicating the channel number (see Table 74).
19 to 16 SPDO_BIT[19:16] Source number. Value indicating the source number (see Table 75).
15 to 8 SPDO_BIT[15:8]
General information. Value indicating general information (see Table 76).
7 to 6
SPDO_BIT[7:6]
Mode. Value indicating mode 0:
00 = mode 0
other states = reserved
5 to 3
SPDO_BIT[5:3]
Audio sampling. Value indicating the type of audio sampling (linear PCM). For
bit SPDO_BIT1 = 0:
000 = two audio samples without pre-emphasis
001 = two audio samples with 50/15 µs pre-emphasis
010 = reserved (two audio samples with pre-emphasis)
011 = reserved (two audio samples with pre-emphasis)
other states = reserved
2
1
0
SPDO_BIT2
SPDO_BIT1
SPDO_BIT0
Software copyright. Value indicating software for which copyright is asserted or not.
If this bit is logic 0, then copyright is asserted; if this bit is logic 1, then no copyright is
asserted.
Audio sample word. Value indicating the type of audio sample word. If this bit is
logic 0, then the audio sample word represents linear PCM samples; if this bit is
logic 1, then the audio sample word is used for other purposes.
Channel status. Value indicating the consumer use of the status block. This bit is
logic 0.
Table 73 Word length
SPDO_BIT32
SPDO_BIT35
SPDO_BIT34
SPDO_BIT33
WORD LENGTH
not indicated
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
16 bits
18 bits
reserved
19 bits
20 bits
17 bits
reserved
2003 Apr 10
58
NXP [ NXP ]
