 |
Electronic Components Datasheet Search |
|
|
Electronic Components Datasheet Search |
|
TAS3002 Datasheet(PDF) 41 Page - Texas Instruments |
|
||||||||||||||||||||||||||||||
TAS3002 Datasheet(HTML) 41 Page - Texas Instruments |
|
|
41 / 74 page  7–1 7 Microcontroller Operation The TAS3002 device contains an internal microcontroller programmed by Texas Instruments to perform housekeeping and interface functions. Additionally, it handles I2C communication and general purpose input functions. 7.1 General Description The microcontroller uses a 256fS system clock and can access up to 8K bytes of memory. It interfaces with the digital audio interface I2C master/slave for downloading data and coefficients. It also interfaces with two internal DSPs for transferring coefficients and other information. The TAS3002 coefficients are loaded through I2C in the master or slave mode. Standard audio processing functions (volume, bass, and treble) can be controlled/activated through external switches connected to the six GPI terminals. Upon reset, the internal microcontroller sets all coefficients and audio parameters to the default values. See Section 7.2.2 for default values. If the TAS3002 address is 68h (ADDR_SEL=0), it becomes the bus master device and attempts to load parameters and coefficients from the external EEPROM. If no EEPROM is present, the TAS3002 device remains in its default condition. If addresses other than 68h/69h are set, the TAS3002 device only operates as an I2C slave device. If the microcontroller determines the TAS3002 device has an I2C address of 68h/69h and the EEPROM is present, the microcontroller downloads coefficients from the EEPROM. Once the download is complete, it enables the serial audio in the mode defined by an I2C write to the MCR to transfer data into and out of the device. Before reading the EEPROM, the serial audio port defaults to I2S mode. The TAS3002 device allows the user to update volume, bass, and treble dynamically by an I2C slave command or by a simple GPI input. The GPI can select volume up and down, bass/treble up and down, or digital equalizations. Up to five different equalizations (that is, flat, jazz, rock, voice, etc.) can be stored in the external EEPROM. Also, DRCE, MCR1, MCR2, and loudness contour are enabled and disabled by I2C. When the TAS3002 device operates in the I2C master mode, it echoes changes to all of its functions to other I2C addresses that are defined in its external EEPROM. If no addresses are defined, it does not echo. 7.2 Power-Up/Power-Down Reset 7.2.1 Power-Up Sequence An active low on terminal 6 (RESET) while MCLK is running resets the internal microcontroller and DSPs. RESET synchronizes internally and can be asserted asynchronously or with the simple RC circuit in Figure 7–1. On reset, SCL and SDA go to a high-impedance state. If the I2C address is set to 68h, approximately 400 µs after RESET returns to a 1, the device sends a one-byte query via I2C to look for an EEPROM. If an EEPROM is found, the TAS3002 becomes an I2C master; otherwise, it becomes an I2C slave. When using address 68h in the slave mode, an external master must wait until after the EEPROM query or else bus contention and improper operation occur. I2C address x6Ah does not query the bus for an EEPROM. The address for the EEPROM is A0h. 7.2.2 Reset The TAS3002 device has an asynchronous reset terminal (RESET). This reset is synchronized with various clocks used in this device to generate a synchronous internal reset. Upon reset, the TAS3002 device goes through the following process: • Clears all the RAM memory content |
Similar Part No. - TAS3002 |
|
Similar Description - TAS3002 |
|
|
Link URL |
| Privacy Policy |
| ALLDATASHEET.COM |
| Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Datasheet Upload | Contact us | Privacy Policy | Link Exchange | Manufacturer List All Rights Reserved©Alldatasheet.com |
| Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
|
Family Site : ic2ic.com |
icmetro.com |
English ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
