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参数资料
| 型号： | TAS3202PAGR |
| 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： | 2/66页 |
| 文件大小： | 817K |
| 代理商： | TAS3202PAGR |
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SLES208B – JUNE 2009 – REVISED MARCH 2011
www.ti.com
3.3
Reset (RESET) Power-Up Sequence
The RESET pin is an asynchronous control signal that restores all TAS3202 components to the default
configuration. When a reset occurs, the audio DSP core is put into an idle state and the 8051 starts
initialization. A valid XTAL_IN must be present when clearing the RESET pin to initiate a device reset. A
reset can be initiated by applying a logic 0 on RESET.
As long as RESET is held LOW, the device is in the reset state. During reset, all I2C and serial data bus
operations are ignored. The I2C interface SCL and SDA lines go into a high-impedance state and remain
in that state until device initialization has completed.
The rising edge of the reset pulse begins the initialization housekeeping functions of clearing memory and
setting the default register values. Once these are complete, the TAS3202 enables its master I2C interface
and disables its slave I2C interface.
Using the master interface, the TAS3202 automatically tests to see if an external I2C EEPROM is at
address 1010x. The value x can be chip selects, other information, or don't care, depending on the
EEPROM selected.
If a memory is present and it contains the correct header information and one or more blocks of
program/memory data, the TAS3202 begins to load the program, coefficient and/or data memories from
the external EEPROM. If an external EEPROM is present, the download is considered complete when an
end-of-program header is read by the TAS3202. At this point, the TAS3202 disables the master I2C
interface, enables the slave I2C interface, and starts normal operation. After a successful download, the
micro program counter is reset, and the downloaded micro and DAP application firmware controls
execution.
If no external EEPROM is present or if an error occurs during the EEPROM read, TAS3202 disables the
master I2C interface, enables the slave I2C interface, and proceeds to boot the device according to the
ROM. In this default ROM configuration, the TAS3202 streams audio from input to output if the GPIO1 pin
is asserted logic low on reset; if the GPIO1 pin is asserted logic high, the ADC and the DAC are muted.
NOTE
The master and slave I
2C interfaces do not operate simultaneously.
3.4
Voltage Regulator Enable (VREG_EN)
Setting the VREG_EN high shuts down all voltage regulators in the device. Internal register settings are
lost in this power-down mode. A full power-up/reset/program-load sequence must be completed before the
device is operational.
3.5
Power-On Reset (RESET)
On power up, it is recommended that the TAS3202 RESET be held low until DVDD has reached 3.3 V.
This can be done by programming the system controller or by using an external RC delay circuit. The
1-k
and 1-μF values provide a delay of approximately 200 μs. The values of R and C can be adjusted to
provide other delay values as necessary.
10
Physical Characteristics
Copyright 2009–2011, Texas Instruments Incorporated
Product Folder Link(s): TAS3202
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相关代理商/技术参数 |
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| TAS3204 | 制造商:TI 制造商全称:Texas Instruments 功能描述:AUDIO DSP WITH ANALOG INTERFACE |
| TAS3204EVM | 功能描述:音频 IC 开发工具 TAS3204EVM Eval Mod RoHS:否 制造商:Texas Instruments 产品:Evaluation Kits 类型:Audio Amplifiers 工具用于评估:TAS5614L 工作电源电压:12 V to 38 V |
| TAS3204EVM-LC | 制造商:Texas Instruments 功能描述:TAS3204EVM EVALUATION MODULE - Boxed Product (Development Kits) |
| TAS3204PAG | 功能描述:音频 DSP Hi Perf Dual Core DSP/MCU Aud Proc RoHS:否 制造商:Texas Instruments 工作电源电压: 电源电流: 工作温度范围: 安装风格: 封装 / 箱体: 封装:Tube |
| TAS3204PAGR | 功能描述:音频 DSP Hi Perf Dual Core DSP/MCU Aud Proc RoHS:否 制造商:Texas Instruments 工作电源电压: 电源电流: 工作温度范围: 安装风格: 封装 / 箱体: 封装:Tube |
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