Tegra 200 Series Developer Board User Guide
3.2 I2C Map
The I2C interface can be used to connect a touch screen, touch pad and other devices.
There are two options for the Touch devices. I2C versions of these devices (recommended) interface to the Tegra 250, while PS/2 versions connect to the EC controller.
Table 3. Tegra 200 Series Developer Board I2C Map
| Domain |
| Contrlr | Pins | Volt. | Device | ID / I2C Addr | Location |
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| VDDIO_VI |
| I2C3 | CAM_I2C_SCL/SDA | 3.3V | MEC1308 (I2C Master) | Tegra 250 Slave addr: | Main Board |
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| 0x45 | ||||||
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| VDDIO_VI |
| I2C3 | CAM_I2C_SCL/SDA | 3.3V | Touchpad | 0x28 | Remote Location |
| VDDIO_VI |
| I2C3 | CAM_I2C_SCL/SDA | 3.3V | Touchscreen | TBD | Remote Location |
| VDDIO_UART |
| I2C1 | GEN1_I2C_SCL/SDA | 1.8V | Camera | 0x36 | Main Board |
| VDDIO_UART |
| I2C1 | GEN1_I2C_SCL/SDA | 1.8V | Autofocus DAC | 0x0C | Main Board |
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| VDDIO_UART |
| I2C1 | GEN1_I2C_SCL/SDA | 3.3V | Option for SMB to Battery Pack | Pack is Master or Slave | Main Board |
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| Slave addr: 0x0B | ||||||
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| VDDIO_UART |
| I2C1 | GEN1_I2C_SCL/SDA | 3.3V | Option for SMB to Charger | 0x09 | Main Board |
| VDDIO_LCD |
| I2C2 | DDC_SCL/SDA | 5.0V | Mini VGA or HDMI Display | 0x30, 0x50, 0x52 | Main Board |
| VDDIO_SYS |
| PWR_I2C | PWR_I2C_SCL/SDA | 1.8V | TI TPS658621 PMU | 0x34 | Main Board |
| VDDIO_UART |
| I2C1 |
| 1.8V | WM8903 Audio Codec | 0x1A | Main Board |
| VDDIO_SYS |
| PWR_I2C |
| 1.8V | ID EEPROM | 0x50 | Main Board |
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| VDDIO_SYS |
| PWR_I2C |
| 1.8V | ID EEPROM | 0x51 | Remote Location |
| VDDIO_SYS |
| PWR_I2C |
| 1.8V | Temperature Sensor | 0x4C | Main Board |
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Figure 5. I2C Diagram
Advance Information – Subject to Change | 14 | |
| NVIDIA CONFIDENTIAL |
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