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参数资料
| 型号： | TAS3218IPZP |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 消费家电 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PQFP100 |
| 封装： | GREEN, PLASTIC, TQFP-100 |
| 文件页数： | 19/79页 |
| 文件大小： | 1263K |
| 代理商： | TAS3218IPZP |
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I2C Chip Select
GPIO Pins
SLES235 – JULY 2008 ....................................................................................................................................................................................................... www.ti.com
Power-Up Sequence
The rising edge of the RESET pin begins the initialization of housekeeping functions by clearing memory and
setting the default register values. After housekeeping initialization is complete, the TAS3218 enables the master
I2C interface. The TAS3218 then uses the master I2C interface to determine if an external memory device is
present.
External Memory Device Present
Using the master I2C interface, the TAS3218 will automatically test to see if an external memory device is at
address 1010xxx. The value xxx can be chip selects, other information, or dont care depending on the EEPROM
selected.
If an external memory device is present and it contains the correct header information along with one or more
blocks of program/memory data, the TAS3218 will automatically download the M8051 MCU program RAM,
coefficient and/or data RAM from the external EEPROM. This download is considered complete when an end of
program header is read by the TAS3218.
The memory block structure of the external memory device is available in Master I2C Load RAM Block Formats.
At this point, the TAS3218 will disable the master I2C interface, enable the slave I2C interface, and start normal
operation. After a successful download, the M8051 MCU program counter will be reset and the downloaded
M8051 MCU and DSP application firmware will control execution.
External Memory Device Not Present
If no external EEPROM is present or if an error occurred during the external memory device read, the TAS3218
will disable the master I2C interface, enable the slave I2C interface. The default slave configuration will then be
loaded from the ROM into the M8051 MCU and DSP. In this default configuration, the TAS3218 will stream audio
from input to output if the GPIO1 pin pulled LOW.
NOTE:
The master and slave interfaces do not operate simultaneously, thus when one
interface is enabled, the other is disabled.
The CS pin on the TAS3218 allows up to two TAS3218 devices to be addressed by the I2C bus via an external
host controller without the need for external logic. Table 5 and Table 6 list the I2C address for each I2C interface.
Table 5.
I2C Slave Addressing
SLAVE ADDRESS
CS
0x68/69
0
0x6A/6B
1
Table 6.
I2C Master Addressing
SLAVE ADDRESS
CS
0xA0/A1
0
0xA2/A3
1
The TAS3218 has two level-sensitive GPIO pins, GPIO1 and GPIO2, that are firmware programmable. Upon
power up or following a RESET, the GPIO1 pin becomes an input, and has a special function as described in
26
Copyright 2008, Texas Instruments Incorporated
Product Folder Link(s): TAS3218
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相关代理商/技术参数 |
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| TAS3218IPZPR | 功能描述:音频 DSP Dig Audio SoC for multi-channel app 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 |
| TAS3218PZP | 功能描述:音频 DSP Dig Audio SoC for multi-channel app 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 |
| TAS3218PZPR | 功能描述:音频 DSP Dig Audio SoC for multi-channel app 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 |
| TAS-3225A | 制造商:TEW 功能描述: |
| TAS-3225A 44.000KHZ | 制造商:TEW 功能描述: |
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