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参数资料
| 型号： | TAS5508PAGRG4 |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 消费家电 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PQFP64 |
| 封装： | GREEN, PLASTIC, TQFP-64 |
| 文件页数： | 16/105页 |
| 文件大小： | 1286K |
| 代理商： | TAS5508PAGRG4 |
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2.2
TAS5508 Functional Description
2.2.1
Power Supply
2.2.2
Clock, PLL, and Serial Data Interface
2.2.2.1 Serial Audio Interface
TAS5508
8-Channel Digital Audio PWM Processor
SLES091D – FEBRUARY 2004 – REVISED JULY 2009
www.ti.com
Figure 2-1 shows the TAS5508 functional structure. The following sections describe the TAS5508
functional blocks:
Power supply
Clock, PLL, and serial data interface
I2C serial-control interface
Device control
Digital audio processor (DAP)
The power-supply section contains supply regulators that provide analog and digital regulated power for
various sections of the TAS5508. The analog supply supports the analog PLL, whereas digital supplies
support the digital PLL, the digital audio processor (DAP), the pulse-width modulator (PWM), and the
output control (reclocker). The regulators can also be turned off when terminals RESET and PDN are both
low.
The TAS5508 is a clocked slave-only device that requires the use of an external 13.5-MHz crystal. It
accepts MCLK, SCLK, and LRCLK as inputs only.
The TAS5508 uses the external crystal to provide a time base for:
Continuous data and clock error detection and management
Automatic data-rate detection and configuration
Automatic MCLK-rate detection and configuration (automatic bank switching)
Supporting I2C operation/communication while MCLK is absent
The TAS5508 automatically handles clock errors, data-rate changes, and master-clock frequency
changes without requiring intervention from an external system controller. This feature significantly
reduces system complexity and design.
The TAS5508 operates as a slave-only/receive-only serial data interface in all modes. The TAS5508 has
four PCM serial data interfaces to permit eight channels of digital data to be received though the SDIN1,
SDIN2, SDIN3, and SDIN4 inputs. The serial audio data is in MSB-first, 2s-complement format.
The serial data input interface of the TAS5508 can be configured in right-justified, I2S, or left-justified
modes. The serial data interface format is specified using the I2C data-interface control register. The
supported formats and word lengths are shown in Table 2-1.
18
Description
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