參數資料
型號： TAS3103IDBTR
廠商： TEXAS INSTRUMENTS INC
元件分類： 消費家電
英文描述： SPECIALTY CONSUMER CIRCUIT, PDSO38
封裝： GREEN, PLASTIC, TSSOP-38
文件頁數： 100/148頁
文件大小： 1247K
代理商： TAS3103IDBTR
224
between recognizing the activation of pin PWRDN and entering the power down would be 4096 LRCLK periods,
assuming a volume slew rate selection (bit VSC of I2C subaddress 0xF1) of 4096 and the issuance of a volume
update immediately preceding the reading of pin PWRDN. The worst case time lag between setting PWRDN to logic
1 and entering the power down state is then:
power – down – time lag
Worst-Case +
4096
) GPIOFSCOUNT
LRCLK
)
80
Microprocessor-Clock
There is also a time lag between deactivating PWRDN (setting PWRDN to logic 0) and exiting the power down state.
This time lag is set by the time it takes the internal digital PLL to stabilize, and this time, in turn, is set by the master
clock frequency (MCLKI or XTALI) and the PLL output clock frequency. For a 135-MHz PLL output clock and a 24.576
MCLKI, the time lag is approximately 25
s. For a 11.264-MHz PLL output clock and a 1.024-MHz MCLKI, the time
lag is approximately 360
s.
Power consumption in the power-down state is approximately 12 mW.
2.7
Watchdog Timer
There is a watchdog timer in the TAS3103 that monitors the microprocessor activity. If the microprocessor ever
ceases to execute its stored program, the watchdog timer fires and resets the TAS3103. This capability was included
in the TAS3103 for factory test purposes and has little use in applications. The program structure used in the
microprocessor assures that the microprocessor always executes its stored program unless a hardware failure
occurs.
The watchdog timer is governed by the parameter GPIOFSCOUNT in subaddress 0xEF and the LSB of the 32-bit
word at subaddress 0xEB. The default value of the LSB of the 32-bit word at subaddress 0xEB is 1 and this value
disables the watchdog timer. The GPIOFSCOUNT is also used in other functions and balancing the needs of these
other functions regarding GPIOFSCOUNT with the requirements of the watchdog timer is an involved process. For
this reason, it is strongly recommended that the LSB of the 32-bit word at subaddress 0xEB remain a 1. If an
application does require use of the watchdog timer, it is requested that the user contact an application engineer in
the Digital Audio Department of Texas Instruments for details in properly using this feature.
2.8
General-Purpose I/O (GPIO) Ports
The TAS3103 has four general-purpose I/O (GPIO) ports. Figure 221 is a block diagram of the GPIO circuitry in the
TAS3103.
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相關代理商/技術參數
參數描述
TAS3103IDBTRG4 功能描述:音頻 DSP Digital Audio Processor RoHS:否 制造商:Texas Instruments 工作電源電壓: 電源電流: 工作溫度范圍: 安裝風格: 封裝 / 箱體: 封裝:Tube
TAS3108 制造商:TI 制造商全稱:Texas Instruments 功能描述:AUDIO DIGITAL SIGNAL PROCESSORS
TAS3108DCP 功能描述:音頻 DSP 8-Channel Audio DSP RoHS:否 制造商:Texas Instruments 工作電源電壓: 電源電流: 工作溫度范圍: 安裝風格: 封裝 / 箱體: 封裝:Tube
TAS3108DCPG4 功能描述:音頻 DSP 8-Channel Audio DSP RoHS:否 制造商:Texas Instruments 工作電源電壓: 電源電流: 工作溫度范圍: 安裝風格: 封裝 / 箱體: 封裝:Tube
TAS3108DCPR 功能描述:音頻 DSP 8-Channel Audio DSP RoHS:否 制造商:Texas Instruments 工作電源電壓: 電源電流: 工作溫度范圍: 安裝風格: 封裝 / 箱體: 封裝:Tube
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