A 40-pin header, not populated, is available on several expansion boards of the Overo series.
Design Notes:
- All logic levels are 1.8V.
- Signals available on 0.100" through-holes.
- A to D converter lines run direct to the TPS65950 with a maximum 2.5V.
- The VCC_1.8 signal is generated on the expansion board.
- More information on Texas Instrument's TPS65950 ·Audio and Power Management module may be found here.
- The 40-pin header is available on the Summit, Tobi, Chestnut43, Palo43, Palo35 and Gallop43 expansion boards.
- This 40-pin header is not available on any Overo COM.
Latest revisions:
May 27, 2010
- Pin 18 is now correctly labeled as GPIO_10. Pin 18·was incorrectly labeled as GPIO127_TS_IRQ
- Pin 17 is now correctly labeled as GPIO_186. Pin 17 was incorrectly labeled as GPIO128_GPS_PPS.
February 9, 2010 to correct VCC_1.8 information.
| Comments |
Signal | Pin | Pin | Signal | Comment |
| · | V_BATT |
40 |
39 | ADCIN4 |
· |
| · | ADCIN3 | 38 | 37 | AGND |
· |
| · | ADCIN5 | 36 | 35 | ADCIN6 | · |
| · | ADCIN2 | 34 | 33 | ADCIN7 | · |
| · | PWM1 | 32 | 31 | PWM0 | · |
| · | GPIO144_PWM9* | 30 | 29 | GPIO147_PWM8 | · |
| · | GPIO145_PWM10* | 28 | 27 | GPIO146_PWM11 | · |
| · | VCC_1.8 | 26 | 25 | GND | · |
| · | GPIO185_SDA3 | 24 | 23 | GPIO184_SCL3 | · |
| · | GPIO166_IR_TXD3 | 22 | 21 | GPIO165_IR_RXD3 | · |
| · | GPIO163_IR_CTS3 | 20 | 19 | GPIO170_HDQ_1WIRE | · |
| · | GPIO_10 | 18 | 17 | GPIO_186 | · |
| · | VCC_1.8 | 16 | 15 | GND | · |
| · | POWERON | 14 | 13 | GPIO0_WAKEUP | · |
| · | VBACKUP | 12 | 11 | SYS_EN | · |
| · | GPIO148_TXD1 | 10 | 9 | GPIO151_RXD1 | · |
| · | GPIO175_SPI1_CS1 | 8 | 7 | GPIO173_SPI1_MISO | · |
| · | GPIO174_SPI1_CS0 | 6 | 5 | GPIO172_SPI1_MOSI |
· |
| · | GPIO114_SPI1_NIRQ | 4 | 3 | GPIO171_SPI1_CLK | · |
| · | VCC_3.3 | 2 | 1 | GND | · |
* GPIO144_PWM9 and GPIO145_PWM10 signals are used to drive the 4.3" and 3.5" LCD panels. Respectively, these are the "display enable" and "backlight PWM" lines.
