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| 型號(hào)： | TAS3218IPZPR |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 消費(fèi)家電 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PQFP100 |
| 封裝： | GREEN, PLASTIC, TQFP-100 |
| 文件頁數(shù)： | 9/79頁 |
| 文件大?。?/td> | 1263K |
| 代理商： | TAS3218IPZPR |
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Start of Channel Status Block
Audio Data
Preamble
Bits: 0
3 4
7 8
27 28 29 30 31
Aux Data LSB
MSB V U C P
Channel A
Channel B
Z
Y
X
Validity Data
User Data
Parity Bit
Frame 191
Frame 0
Frame 1
One Sub-Frame
Channel Status Data
www.ti.com ....................................................................................................................................................................................................... SLES235 – JULY 2008
Figure 14. SPDIF Frame Format
SPDIF Encoder Operation
The SPDIF encoder performs the multiplexing of audio, channel status, user, and validity flag. It also performs
bi-phase mark encoding of the multiplexed data stream. Audio data for both left and right channels from the DAP
are latched at the rising edge of the internal LRCLK, which marks the beginning of next sample cycle. The SPDIF
encoder then multiplexes these samples with internally generated preambles, channel status, user data, validity
flag, and parity. The channel status and validity flag are generated based on the settings in the SPDIF control
registers while the user data is fixed to all zero. The bi-phase mark encoded signal is then output starting at the
next rising edge of the internal LRCLK. The generated SPDIF stream is fixed to consumer mode linear audio
PCM format.
While the RESET input is low, the transmitter output, SPDIF_OUT, is forced to logic low level. Upon setting
RESET high, the SPDIF encoder will remain inactive until the module reset is removed by writing 0 to the RST
bit of the control register. Then this module will wait for synchronization with the internal frame clock and starts
encoding audio data. It is recommended to set all other SPDIF control register bits before releasing the module
reset.
Transmitter Control Register
Table 1 shows the M8051 SFR register map for the S/PDIF module control.
Table 1. M8051 SFR Register Map
ADDR
7
6
5
4
3
2
1
0
xx00
RST
CP
EMP
xx01
CATEGORY
L
xx10
SR
VL
VR
SRCNUM
xx11
CLKAC
WORDLEN
Copyright 2008, Texas Instruments Incorporated
17
Product Folder Link(s): TAS3218
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| TAS3218PZP | 功能描述:音頻 DSP Dig Audio SoC for multi-channel app RoHS:否 制造商:Texas Instruments 工作電源電壓: 電源電流: 工作溫度范圍: 安裝風(fēng)格: 封裝 / 箱體: 封裝:Tube |
| TAS3218PZPR | 功能描述:音頻 DSP Dig Audio SoC for multi-channel app RoHS:否 制造商:Texas Instruments 工作電源電壓: 電源電流: 工作溫度范圍: 安裝風(fēng)格: 封裝 / 箱體: 封裝:Tube |
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