Connector J1 (70-pin): LCD, PWM & Analog Signals

 

The Signals Document provides a detailed reference for all external electrical signals from the Overo COM. See "downloads".

 

Design Notes for Connector J1:

Connector (J1) is one of the 2 x 70-pin connectors located on the bottom of each Overo COM.

  1. All logic is at 1.8V.
  2. The input range of the supply voltage is approximately 3.3V – 4.2V.
  3. The signals of connectors J1 are connected directly to the OMAP35xx without buffers.
  4. USBOTG interface supports high speed USB (480MBs).
  5. Pin 8 was incorrectly labeled as GPIO127_TS_IRQ. Pin 8 is now correctly labeled as GPIO_10.
  6. Pin 14 was incorrectly labeled as GPIO128_GPS_PPS. Pin 14 is now correctly labeled as GPIO_186.
  7. The physical location of pin 1 of the J1 connector can be found in the layout information posted at pubs.gumstix.com (see COMs section).
  8. Some notes re JTAG and J1-9 (GPIO_31) have been linked below.
  9. Last update on Sept 22, 2011 re pin 62 and pin 63.
Comments Signal Pin Pin
Signal Comments

Use to trigger hard reset (i.e. power-on reset).

N_MANUAL_RESET
1
70 GND

GPIO71_L_DD01 2 69 HSORF

GPIO70_L_DD00 3 68 HSOLF

GPIO73_L_DD03 4 67 VSYSTEM board supply: 3.3V - 4.2V

GPIO75_L_DD05 5 66 VSYSTEM board supply: 3.3V - 4.2V

GPIO72_L_DD02 6 65 POWERON Connected to PWRON on PMIC

GPIO74_L_DD04 7 64 ADCIN7

GPIO_10 8 63 TV_OUT1
Connected on Overo COMs R3265 and higher
  • COMs R2173 to R2516: J1 pin 9 is GPIO0_WAKEUP; GPIO31 goes to a test point on the board only.
  • COMs > R2606: J1 pin 9 is GPIO31_WAKEUP· GPIO0 is used as the IRQ from the PMIC.
GPIO0_WAKEUP
9 62 TV_OUT2
Connected on Overo COMs R3265 and higher

GPIO185_I2C3_SDA 10 61 GPIO93_L_DD23

GPIO80_L_DD10 11 60 GPIO82_L_DD12

GPIO81_L_DD11 12 59 SYSEN Connected to SYSEN on PMIC

GPIO184_I2C3_SCL 13 58 ADCIN2

GPIO_186 14 57 MIC_MAIN_MF

GPIO92_L_DD22 15 56 GND

GPIO147_GPT8_PWM 16 55 GPIO145_GPT10_PWM

GPIO83_L_DD13 17 54 USBOTG_VBUS power out from the PMIC

GPIO144_GPT9_PWM 18 53 ADCIN6

GPIO84_L_DD14 19 52 VBACKUP Backup battery input to PMIC

GPIO85_L_DD15 20 51 ADCIN5

GPIO146_GPT11_PWM 21 50 AGND


GPIO163_IR_CTS3 22 49 PWM1

GPIO91_L_DD21 23 48 ADCIN3

GPIO87_L_DD17 24 47 GPIO170_HDQ_1WIRE

GPIO88_L_DD18 25 46 USBOTG_ID

GPIO166_IR_TXD3 26 45 GPIO90_L_DD20

GPIO89_L_DD19 27 44 GPIO86_L_DD16

GPIO79_L_DD09 28 43 GPIO69_L_BIAS

GPIO77_L_DD07 29 42 PWM0

GPIO78_L_DD08 30 41 AUXRF

GPIO165_IR_RXD3 31 40 ADCIN4

GPIO66_L_PCLK 32 39 MIC_SUB_MF

GPIO76_L_DD06 33 38 AUXLF

GPIO68_L_FCLK 34 37 USBOTG_DM

GPIO67_L_LCLK 35 36 USBOTG_DP
Home Hardware Design Overo Series Overo Series Signals and Connectors Connector J1 (70-pin): LCD, PWM & Analog Signals