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Microhard Add-on Datasheet

This expansion board plugs directly into VOXL and supports pDDL modules from Microhard (not included).

Once a module is installed and connected to VOXL, this unit can be paired with the ModalAI Microhard USB Dongle.

Manual

Table of contents

  1. Specification
    1. Block Diagram
    2. Part Numbers
    3. Physical Specification
    4. Power Consumption
  2. Board Connections and I/O
    1. Top of Board
    2. Bottom of Board
    3. USB Connections
    4. LEDs
    5. CFG Switch
  3. Configuration
    1. Slave Configuration
  4. Connector Pinouts
    1. J4 - USB Port 3
    2. J5 - USB Port 4
  5. Mechanical Drawings
    1. 2D Drawings
    2. 3D Drawings
  6. Additional Pictures
    1. Disassembled
    2. Assembled with VOXL

Specification

Block Diagram

View in fullsize

voxl-acc-mh-block-diagram.jpg

Part Numbers

Part NumberSilkscreen MarkingDescription
VOXL-ACC-MH-2 (coming soon)M0048 REV AMoved to LAN7500 ethernet controller for better compatibility with Android
VOXL-ACC-MH-1M0012 REV AInitial Release

Physical Specification

SpecicifcationValue
Weight12g
Dimensions49 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 Client Connectors4 Position JST GH, Vertical, BM04B-GHS-TBT
USB2 Client Mating ConnectorJST GHR-04V-S
J1 Connector (bottom of board)Samtec Inc, MPN: QTH-030-01-F-D-K
J1 Mating ConnectorSamtec Inc., MPN: QSH-030-01-L-D-A-K

Power Consumption

M0048 Configuration5V Power Consumption (mA)
Baseline (USB Hub, Glue Logic, All LEDs ON)315
Baseline plus Qty-2 USB Peripherals at Max 500mA*1375
Baseline + Qty-2 DS USB* + Microhard 900MHz @ 10dBm2800
Baseline + Qty-2 DS USB* + Microhard 900MHz @ 30dBm3700
Baseline + Qty-2 DS USB* + Microhard 2400MHz @ 10dBm2500
Baseline + Qty-2 DS USB* + Microhard 2400MHz @ 30dBm3100

*For each of the two downstream peripherals removed from the hub, subtract 500mA plus ~30mA logic from the power requirement.

Board Connections and I/O

Top of Board

voxl-acc-mh-2-top.png

Bottom of Board

voxl-acc-mh-2-bottom.png

USB Connections

You can connect up to two USB-clients to the USB2 Host ports on the top of the board. A MCBL-00009 cable can be used, this is a 4-pin JST to USB Female Type A cable.

You can connect the carrier board to a host computer using the USB port on the bottom of the baord. An MCBL-00006 cable can be used to connect to a host comptuter (4-pin JST to USB) or the MCBL-00010 stub cable, which is a 4-pin JST to microUSB female cable.

LEDs

IndexLEDDescription
1TXFlashes GREEN indicating wireless TX traffic
2RXFlashes GREEN indicating wireless RX traffic
3RSSI-3Flashes GREEN to indicate the Received Signal Strength on the wireless link
4RSSI-2Flashes GREEN to indicate the Received Signal Strength on the wireless link
5RSSI-1Flashes GREEN to indicate the Received Signal Strength on the wireless link
6CPUSolid BLUEindicates power to module and normal operation, flashing indicates boot or FW upgrade status
7LANTODO
8LAN/100TODO
9LAN/ACTTODO
105VIlluminates solid GREEN indicating 5VDC USB bus power enabled
11Port3Illuminates solid GREEN indicating Port 3 USB power enabled
12Port4Illuminates solid GREEN indicating Port 4 USB power enabled

CFG Switch

Can be used to reset all settings to default values required for a Slave module.

Configuration

Slave Configuration

To reset all settings to the default values required for a Slave module, press and hold the CFG Button, once the CPU LED begins to flash, continue to hold for 5 seconds, then release.

The module will then reset all settings to the default values required for a Slave module

Connector Pinouts

J4 - USB Port 3

  • Connector - 4 Position JST GH, Vertical, BM04B-GHS-TBT
  • Mating Connector - JST GHR-04V-S
PinDescription
15VDC (500mA max)
2D-
3D+
3GND

J5 - USB Port 4

  • Connector - 4 Position JST GH, Vertical, BM04B-GHS-TBT
  • Mating Connector - JST GHR-04V-S
PinDescription
15VDC (500mA max)
2D-
3D+
3GND

Mechanical Drawings

2D Drawings

M0012-Microhard.PNG

3D Drawings

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

Additional Pictures

Disassembled

voxl-acc-mh-disassembled.jpg

Assembled with VOXL

voxl-acc-mh-assembled.jpg