Microhard Add-on Datasheet

This expansion board plugs directly into VOXL and supports (pDDL modules from Microhard)[http://www.microhardcorp.com/pDDL.php] (not included).

Once a module is installed and connected to VOXL, this unit can be paired with the ModalAI (Microhard USB Dongle)[https://docs.modalai.com/microhard-usb-carrier/].

Table of contents

  1. Board Connections and I/O
  2. Physical Specification
  3. USB Ports
  4. Debug Ports
  5. Status LEDs
  6. USB LEDs
  7. Connector Pinouts
    1. J11 - Serial Debug Port
    2. J16 - USB Port 1
    3. J17 - USB Port 2
  8. Radio Specification
  9. Environmental
    1. Operating Temperature
  10. Emergency Boot Switch
  11. Pictures
    1. Disassembled
    2. Assembled with VOXL
  12. 2D/3D Drawings

Board Connections and I/O

voxl-acc-mh-block-diagram.jpg

Physical Specification

Specicifcation Value
Weight 12g
Dimensions 49 x 40mm
Antenna Connector ?? UFL-R-SMT-110
Recommend Antennas  
Debug Console Connector ?? SM04B-SRSS-TBLFSN
Debug Console Matimg Connector ?? SHR-04V-S-B
USB2 Host Connectors 4 Position JST GH, Vertical, BM04B-GHS-TBT
USB2 Host Mating Connector JST GHR-04V-S
J7 Connector (bottom of board) Samtec Inc, MPN: QTH-030-01-F-D-K
J7 Mating Connector Samtec Inc., MPN: QSH-030-01-L-D-A-K

M0012-Microhard.PNG

USB Ports

Two USB 2.0 compliant ports

Debug Ports

Serial debug port

Status LEDs

LED Description
PWR Illuminates GREEN when the board is powered
   
   

USB LEDs

The Modem USB Power and USB Port Power LEDs illuminate green to indicate the USB bus and ports are powered

Connector Pinouts

J11 - Serial Debug Port

Pin Description
1 3.3 VDC
2 UART_RX_3P3V
3 UART_TX_3P3V
4 GND

J16 - USB Port 1

Pin Description
1 5VDC (500mA min)
2 D-
3 D+
3 GND

J17 - USB Port 2

Pin Description
1 5VDC (500mA min)
2 D-
3 D+
3 GND

Radio Specification

Environmental

Operating Temperature

Parameter Min Max Unit
LTE System Functional -40 +60 ºC
Module Functional -40 +85 ºC
Module 3GPP Compliant -20 +60 ºC

Emergency Boot Switch

Typically left in the OFF state, this switch can be used to enable emergency boot mode. More information can be found here.

Pictures

Disassembled

voxl-acc-mh-disassembled.jpg

Assembled with VOXL

voxl-acc-mh-assembled.jpg

2D/3D Drawings

  • Dimensions: TODO

M0048_MICROHARD_WITH_SOCKET_LAN7500.stp

Note: This drawing contains the LAN7500 device and circuits, earlier revisions had the LAN7850 device and circuits. If the older design is needed, contact ModalAI.

Note: These 3D files contain all components on them. Some board configurations do not install “DNI” certain connectors or components. Please refer to the included diagrams and design schematics for more detailed information