An iMod Module is a small boards that fits into an iMod Port on a target board. The module normally has press-fit connectors, and can be pressed into the pads on the iMod Port without any solder required. For a permanent connection, it could also be soldered. It is part of the Modtronix Presto Range of products. An iMod Module is used to add functionality to a target board. Some typical iMod Modules have interface drivers for adding an interface to a target board, like RS-232, RS-485, CAN Bus...

All iMod Modules have two rows of connectors, a left and a right row. The signals on these connectors are pre-defined, allowing modules to be interchangeable. On the iMod Port, pin 1 (top most pin) of the left row will have a white marking around it. Most iMod Ports will have multiple left and right rows, situated next to each other. This allows iMod Modules of different widths to be mounted. The first picture below shows a typical iMod Port with two left rows, and a single right row. This allows iMod Modules of 0.6" and 0.7" to be mounted. If an iMod Port has multiple left or right rows, the adjacent pads are connected, as shown (with blue lines) in

A single iMod Module is defined to have a maximum row spacing of 0.7”, referred to as one module width. Modules can however be wider than one module width, other common module widths are 0.9”, 1.1” and 1.6”. Target boards can provide iMod Ports for fitting iMod modules. An iMod Port is very simple and cheap to implement, only two rows of 1.00mm pads 0.7” apart are required (with a 0.1”, that is 2.54mm, grid). Modules wider than 0.7” will normally take up two iMod Ports on the target board. Adjacent iMod Ports should be spaced 0.2” apart. To help inserting the iMod module correctly into the iMod Port, pin 1 of the left connector is marked (white band around pad) on the iMod Module and iMod Port, and should always be aligned!

• Pin 1 is 0V
• Pins 3 and 4 is a serial port, like a USART, CAN Bus, USB....
• When used for a USART, 3 = Received Data, and 4 = Transmit Data
• When used for a CAN Bus, 3 = CAN Receive, and 4 = CAN Transmit (Initial pin assignment,might change)
• When used for USB, 3 = D-, and 4 = D+ (Initial pin assignment,might change)
• Pins 2, 5, 6, 7, 9 and 10 are general purpose I/O ports. Pins 2 and 5 are guaranteed to always be dedicated I/O pins. On some host boards, the other I/O pins might be shared between ports (if there are not enough available I/Os).
• Pins 12, 13 and 14 is a SPI or I2C serial port.
  • When used as a SPI port, 12=SDO, 13=SDI and 14=SCK
  • When used as a I2C port, 13=SDA and 14=SCL
• Pin 11 is Vsec, which is the secondary supply voltage. This will normally be 5V on a 3.3V board, and 5V on a 3.3V board.
• Pin 15 is Vcc. This is 3.3V or 5.0V, depending on the operating voltage of the host board.
• Pin 16 is Vaux. This is the unregulated input voltage of the host board. For example, if the host is supplied with a 12V DC supply, this will be 12V.
• On host boards with multiple iMod Ports, some I/O signals might be shared between ports. The first pins to be shared will be the ones at the back, pins 8 and 9. Next will be 7 and 10. It is thus recommended that iMod Modules first use the I/O signals at the front, in this order: pin 2, pin 5, pin 6, pin 7, pin 10, pin 8 and last pin 9.

Most iMod Ports will have multiple left and right rows, situated next to each other. This allows iMod Modules of different widths to be mounted. The pictures below show some typical iMod Ports with multiple left and/or right rows. This allows iMod Modules of different widths to be mounted.

If an iMod Port has multiple left or right rows, the adjacent pads are electrically connected. This is shown with blue lines in the pictures below.