The TAS2120 device
can operate
in a Pin control based HW Mode depending on the resistor terminations used for
Select Pin1 to Select Pin5. Pin control based HW Mode behavior of the device is
designed to simplify device configuration without using any software based
configurations through I2C communication.
Table 6-2 Select Pin Functionalities
| Select Pin Name |
Functionality |
| SEL1 |
Amplifier gain setting with volume ramp enable/disable
option |
| SEL2 |
I2S, TDM, Left justified selection |
| SEL3 |
Data valid rising/falling edge selection |
| SEL4 |
Y-bridge threshold configuration |
| SEL5 |
Supply voltage mode selection |
Table 6-3 SEL1 HW Mode configuration
| SEL1 Connection |
Amplifier Gain |
Volume Ramp |
| Direct Short to GND |
Configured through I2C |
Configured through I2C |
| 1.2kΩ to GND |
6 dBV |
Disabled |
| 1.2kΩ to VBAT |
12 dBV |
Disabled |
| 5kΩ to GND |
18 dBV |
Disabled |
| 330Ω to VBAT |
21 dBV |
Disabled |
| 5kΩ to VBAT |
6 dBV |
Enabled |
| 24kΩ to GND |
12 dBV |
Enabled |
| 24kΩ to VBAT |
18 dBV |
Enabled |
| Direct Short to VBAT |
21 dBV |
Enabled |
Table 6-4 SEL2 HW Mode configuration
| SEL2 Connection |
Configuration |
| Direct Short to GND |
I2S L or TDM0 |
| 330Ω to IOVDD |
I2S R or TDM1 |
| Direct Short to IOVDD |
I2S (L+R)/2 or TDM2 |
| 1.2kΩ to GND |
Left-Justified L or TDM3 |
| 1.2kΩ to IOVDD |
Left-Justified R or TDM4 |
| 5kΩ to GND |
Left-Justified (L+R)/2 or TDM5 |
| 5kΩ to IOVDD |
I2S L or TDM6 |
| 24kΩ to GND |
I2S R or TDM7 |
| 24kΩ to IOVDD |
Reserved |
Table 6-5 SEL3 HW Mode
configuration
| SEL3 Connection |
Configuration |
| Direct Short to GND |
Data valid on rising edge |
| Direct Short to IOVDD |
Data valid on falling edge |
Table 6-6 SEL4 HW Mode
configuration
| SEL4 Connection |
Configuration |
| Direct Short to GND |
Y-bridge threshold of 80mW |
| Direct Short to IOVDD |
Y-bridge threshold of 40mW |
| 24kΩ to IOVDD |
Y-bridge threshold of 1mW |
Table 6-7 SEL5 HW Mode
configuration
| SEL5 Connection |
Configuration |
| Direct Short to GND |
1S Boost Mode |
| Direct Short to IOVDD |
External PVDD Mode |
| 24kΩ to IOVDD |
2S Boost Mode |