Equivalent chip for TLV320AIC22C(NRND).

or Can you suggest some solution which does the work of TLV320AIC22C?

Hi, Sita,

Please take a look at the TLV320AIC1110 and TLV320AIC1103. These are PCM codecs that support 15-bit linear data and 8-bit companded (u-law and a-law) data. Please let me know if you have more questions or comments.

Best regards,
Luis Fernando Rodríguez S.

Hi Fernando,
In our design, we have to connect our device to a telephone land line. Then our device will trasmit/receive the encoded voice data to/from the CellPhone(using WIFI). IC TLV320AIC22C has a provision to connect to land line. Can you suggest a similar IC which can be connected to landline.

Hi, Sita,

The most similar devices with CallerID interface are the TLV320AIC2x family: www.ti.com/.../tlv320aic20k.pdf

Best regards,
Luis Fernando Rodríguez S.

Hi, Sitaramaraju,

Both codecs (TLV320AIC2x and TLV320AIC1110) support I2C protocol. This protocol is used to configure the internal registers. So, there's no need of more processing power since they require a standard protocol (I2C).

Please let me know if you have more questions or comments.

Best regards,
Luis Fernando Rodríguez S.

Hi Rodriguez,

In TLV320AIC1110, SCL and SDA pins are used to configure the internal registers through I2C protocol. But pins PCMIN, PCMOUT, PCMSYN and PCMCLK are used to transfer PCM data to the TLV320AIC1110 from Microcontroller(and vice versa). Please refer the figure 1, figure 2, figure 4 and figure 5 in the data sheet. This protocol is not a standard protocol and requires most of the processing power of the Microcontroller.

Kindly correct me if I am wrong in my understanding.

Regards,
Sitaramaraju Chiluvuri

Hi, Sitaramaraju,

That's correct. The most part of our codec devices use the I2C or SPI protocol in order to configure the internal registers. The data transmission is made by the serial data interface by different protocols such I2S, PCM, DSP, left/right justified, etc.

However, if you're looking to transfer data by a standard protocol such SPI, you may take a look at this Application Report: www.ti.com/.../slaa449a.pdf.

Best regards,
Luis Fernando Rodríguez S.

Hi Rodríguez,

In the data sheet of TLV320AIC1110, data transmission happens through pins PCMCLK, PCMSYNC, PCMI, PCMO. I watched the data transfer timing diagrams(Figure 4 and figure 5 for 128khz), but could not understand it completely.

Questions:

1. At every high to low transition of the PCMCLK, data is clocked into PCMI, and clocked out of PCMO. Am I right in my understanding?

2. What protocol is it? (I2S, left/right justified, etc). With this answer I can find out whether Application-Report-slaa449a is mostly valid for data transmission in TLV320AIC1110

Regards,

Sitaramaraju Chiluvuri

Hi, Sitaramaraju,

The TLV320AIC1110 has its own PCM protocols that are little different from the I2S, DSP and left/right justified modes. The differences are in the point where the data is sent or taken. In case of the protocol at 128kHz, the data is sent/taken at the falling edge of the PCMCLK after the rising edge of PCMSYNC. In case of the diagram at 2.048MHz, the data is sent/taken at the falling edge after the PCMSYN pulse.

These modes are related with the left-justified and DSP modes (see the TLV320AIC3104 datasheet for more details about these protocols). Due to these differences, these modes are called PCM modes.

Please let me know if you have more questions or comments.

Best regards,
Luis Fernando Rodríguez S.