Table of Contents
Several jumpers or shunts on the board, typically placed in default locations, control configurable functionality and provide several implementation options and/or options for experimentation with the board. DL0100A1 (for short) is an 8-channel ultrasonic-for-NDT pulser-receiver board. In this article, photos are omitted by design.
Board Orientation for Discussion
Directions, like East or North, in this article are referenced with the board’s SMA connectors or SMA footprints pointing to the Left, or West, when looking at the top side of the board, that is, the side with the most components on it.
As an example, “East” means placing the jumper onto the two right-most pins in the 3-pin header, leaving the West-most pin unconnected.
The left hand columns of the tables indicate the jumper position. The right hand columns describe the corresponding function to that position.
JP7-VDDEN
Controls how the main subsystem, including the main MCU/DSP and supporting digital logic, is powered up, as relates to the digital power rail regulator(s). Extremely low power consumption can be configured, for example by allowing an synchronized-sleeping mesh XBee device to wake the rest of the board when it needs it.
Usage of the communications (comms) module pin control jumper setting (versus always-on – see table below) applies to XBee radios of various protocols and frequencies, the Connect ME (CME), the Connect Wi-ME, and the Wi-EM modules. Anything that fits into the footprints on the board and allows for GPIO control of the corresponding pins in the either the XBee or Connect ME socket footprints.
For the XBee radio footprint, there are still many other control configurations possible by changing which of R69, R70 and R71 are populated. R71 is the typical default-populated component that connects the XBee DIO1 pin to the board’s main sub-system power control rail, again, if the jumper noted here is set to allow such control.
The CME’s socket footprint always has pin 13 (DIO0) connected to this power enable signal, again, if the matching jumper here is set to allow such control. Other CME socket footprint pins can be configured for power control alternatively using the above mentioned optional resistors and a corresponding software/firmware configuration of the CME module itself.
Very flexible and configurable.
You can use standard networking and related Python (or whatever code you want) along with a matching configuration of the CME module internal settings to control the DIO pin for power control, with the matching jumper setting. Controlling the pin can provide very substantial power budget savings.
| South (away from XBee footprint) | Always On (e.g. USB to Serial) |
| North (toward the XBee footprint) | 1. XBee DIO1 Pin Control (In Default Build Configuration) [Note 1] 2. Connect ME (CME) DIO0 Pin Control [Note 1] 3. See matching pin position on the Wi-ME (basically any ME Series) or Connect/Wi-EM (basically any EM Series) as well for similar pin control function [Note 1] |
JP9-VSYSIN_SEL
Selects the system main power input to be from the a battery or from the main power. On the screw terminal block (STB), the first (East-most) pin is ground as are pins 3 and 5. The 2nd pin West from pin 1 is the usual power input. Pin 4 is a battery power input, for example for a low-power configured solar battery system powering the board. It could also be used as a backup input if the diode protecting pin 2 were blown (and the fault condition corrected).
| East | Use STB Pin 2 for System Power (Default) |
| West | Use STB Pin 4 for System Power (Typically Battery) |
JP1-VBB_IN_SEL
Also relates to solar-battery system functionality for low power nodes with that kind of power supply. It selects how the boost regulator functionality is used. Here, it is relevant that pin 6 on the screw terminal block is an option for solar panel input connection.
| East | Main System Power Supplies the Boost Regulator for High Voltage Module Power Input Generation (Default) |
| West | Boost Regulator Input Power Is Supplied by a Solar Panel (for example for battery charging) |
JP10-VSOLBAT
Relates to solar-battery low power installations and configuration. A relevant main screw terminal block connection is pin 4 which is for battery connection. Default: Do Not Populate
| East | Boost Regulator Output Goes Out to Charge Battery |
| West | Bypass Boost Regulator and Charge Directly for a Charge-Control-Enabled Solar Panel Input |
JP2-MPPCSEL
Relates to low power solar-battery installation and configuration. Sets the voltage between a divider or fixed output for the MPPC feature of the boost regulator. Please contact for more details if needed.
| West | MPPC Tied to VCC of the Boost Reg. (Default) |
| East | MPPC Tied to a Voltage Divider |
JP2 near VSYS
Simply connects or disconnects the main system power LED indicator. Remove to save precious milli-amps of current in minimal power installations.
JP4-AINSEL
Primarily for R&D, experimentation, troubleshooting or analog tuning for specific application cases.
| East | Test Signal Connected to JP4-PULSE or X11_INDRCT Feeds the Analog Gain and Filter Stages |
| West | Multiplexer Output Feeds the Analog Gain and Filter Stages (Default) |
JP6-VAAEN
Controls the analog section regulator enable.
| East | MCU/DSP Controls the Analog Section Regulator On/Off |
| West | Analog Section Regulator is Always On When System Power is Present |
JP12-RDAMP_SEL
Base damping level select for output pulse or input receive. Applies parallel resistance values as a baseline against which the relay-controlled damping levels apply. Depends heavily on the build configuration and is very flexible, depending on selected component values for R60 and R61, as well as, relay-controlled values installed in the footprints for R14, R17, R18. Omit to use only the damping values installed in the relay-controlled damping resistors, that is, R14, R17, R18.
| West | Apply R61 in parallel damping to any other selected damping setting. (Default?) |
| East | Apply R60 in parallel damping to any other selected damping setting. |