12048321 Rev. 01 (Draft)
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4.34. System-I2C 5V Connectors
Reference Designator:
– J4/J5
1.25mm Pitch Molex PicoBlade wire-to-board header, SMT, straight, 4 circuits
Description
J4/J5 connectors provide I2C_SW
(CMOS 5V)
bus of the eDM-CB-SM-IPCS board controller STM32 (U1) for
internal slave devices.
Interface used
I2C-SW bus of the STM32 board controller
Power V_5V0_S5; Imax = 10mA (each connector).
Connector drawing and contact-numbering scheme
Figure 43 Connector
– J4/J5
Pinout according to Data Modul Inhouse-Standard DMIS14
J4,
J5
Pin
Signal / Function
Pin Type
Signal Description
1
GND
GND
Connected to ground potential of the PCB
2
I2C-SW_SCL
IO (CMOS 5V)
I2C clock line
3
I2C-SW_SDA
IO (CMOS 5V)
I2C data line
4
V_5V0_S5
Power 5.0V (S5)
Power supply for attached device; max. current 10mA
4.35. External Power-Button Connector
Reference Designator:
– J61
1.25mm Pitch Molex PicoBlade Wire-to-board header, SMT, straight, 2 circuits
Description
J61 is an External Power-Button Terminal, which is connected parallel to the SW1 Button. The PWRBTN_KEY# is
an open-drain signal to a General purpose input of the STM32 board controller. The board controller forwards the
signal de-bounced by the uC firmware to the SMARC module.
Interfaces used
GPIO pin of the STM32 board controller
Connector drawing and contact-numbering scheme
Figure 44 Connector
– J61
