ST18-AU1 STMICROELECTRONICS [STMicroelectronics], ST18-AU1 Datasheet - Page 22

• Manufacturer Part Number: ST18-AU1
• Description: SIX-CHANNEL DOLBY AC3/MPEG2 AUDIO DECODER
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

ST18-AU1
Table 4.1
22/87
Mnemonic
HostLpcmMixAlpha0-7
HostLpcmMixBeta0-7
HostErrorConcealMod
HostLowPower
HostSerialInputCtrl
HostSerialInoutDiv
HostSerialOutputCtrl
HostSerialOutputDiv
HostAudioClockSel
HostSamplFreq
HostPcmNbBits
WriteStc
Write commands
Opcode
17-1E
0F-16
1F
20
21
22
23
24
25
26
27
80
Size
(bits)
16
8
8
16
16
16
32
Command description and Parameter values
Linear PCM Downmixing Coefficients
In LPCM mode: Alphai is the coefficient to downmix the
channel i into the Left channel. Betai is the downmixing
coefficient for channel i into the Right channel.
In Ac-3 Karaoke mode: the Alpha0 to Alpha5 are used
to downmix respectively the Left, Melody, Right,
Vocal1, Vocal2 channels. Beta0 to Beta5 is respective-
ly used to downmix into the Right channel.
Alpha0 to Alpha7, Beta0 to Beta7.
Error Concealment Mode
Mute (default)
Disabled
Skip
Low Power Stand-by Mode
Off (default)
On
Serial Input Control
Defines the input format.
default: I2S slave
Serial Input Clock Division
In master mode define the clock rate of the input
Serial Output Control
Defines the output format.
default: I2s master
Serial Output Clock Division
In master mode define the clock rate of the output.
default: set for 44.1 Hz
Audio Clock Selection
All clocks derived from the 27MHz (default)
Audio Sample Frequency (Hz)
3200
44100 (default)
48000
Number of bits per sample
16 (default)
18
20
System Time Clock
.
)
00
01
02
00
01
11
10
00
01
16
18
20