GVSDuino Revision X3
The GVSDuino is a replacement for an Arduino UNO with a GVS Shield. The board has the same GVS connections surrounding the ATMega processor that previous revisions of the board used.
The GVSDuino Revision X3 board is a re-layout of the GVSDuino Revision X2 board with some minor changes.
New Features
- Redesigned for seeedstudio Fusion PCB fabrication (changed form factor to a 49x49 mm board).
- This is a larger form factor (49mm x 49mm, or 3.72 in2) than the original design (2.2" x 1/25", or 2.75 in2) which was optimized for size because oshpark prices their PCB fabrication service based on board size.
- Oshpark charges approximately $4.58 per board and seeedstudio charges approximately $1.50 a board.
- Jumper selectable power source selects whether the FTDI (USB) or the DC regulator will be used to power the board.
- Replaced the screw terminal block power connector with a 2.1 mm DC power connector.
- This is more convenient because an inexpensive wall wart can be used.
- The GVSDuino Revision X3 has an extended ISP connector intended to connect to the ATProgHead.
- The ATProgHead board is a daughterboard to the GVSDuino Rev X3 or later.
- It mounts above the GVSDuino board and allows AVRs to be programmed with the Arduino Bootloader.
- Note that this is not the same as an ISP header to program the GVSDuino itself.
- To program the GVSDuino board via ISP, the reset needs to be connected directly to pin 1 of the ATMega328P.
Headers/Connectors
J2 - DC Power Connector
2.1mm connector. Center connection is Plus (+) and outside is Ground (-).
J3 - In System Programming Connector
.
Pin
|
Function
|
Arduino ISP Function |
1
|
D12
|
MISO |
2
|
VCC
|
VCC |
3
|
D13
|
SCK |
4
|
D11
|
MOSI |
5
|
D10
|
RESET*
|
6
|
GND
|
GND |
7 |
VIN |
N/R
|
8 |
D7 |
Prog LED |
9 |
D5 |
N/R
|
10 |
D8 |
Error LED |
11 |
D6 |
N/R
|
12 |
D9 |
Heartbeat LED |
J4 - FTDI Connector/Header
Pin
|
Description
|
1
|
GND
|
2
|
CTS (In)
|
3
|
VCC
|
4
|
TX (Out)
|
5
|
RX (In)
|
6
|
DTR (Out) |
GVS Headers
The GVS headers surround the Microprocessor. The square pins are pin 1. The Microprocessor I/O connections on the headers are:
Pin
|
Function
|
1
|
GND
|
2 |
VCC
|
3
|
Signal
|
The white text below shows the connection that is on pin 3 (AREF and VSEL are exceptions as below).
AREF Header
Connection
|
Function
|
1-2
|
Power Analog pins from +5V
|
2-3
|
Power Analog header pins from Processor AREF
|
VSEL Header
Connection
|
Function
|
1-2
|
Power board from J2 connector
|
2-3
|
Power board from FTDI
|
Board Dimensions
The board size is 49mm x 49mm.
Future Improvements
- Add jumper for ISP header to allow pin to be used as D10 out or Reset-In. This would allow the card to act as a programmer or to be programmed.
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