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Technical Data
This page will list the technical data.
Technical Data
Main Controller
This section shows data for the main controller section including voltage regulators, external RAM, LCD and all glue logic.
Measured at typical battery voltage of 4 V.
| Parameter |
Value |
Comment |
| CPU Type |
Board assembly option |
|
| Clock Frequency |
14.7456 MHz |
UART friendly |
| CPU Supply Voltage |
4.7 V |
Within 16 MHz range but below unregulated USB Voltage |
| Program Flash Memory |
128k Byte 256k Byte |
ATmega1280-16 ATmega2560-16 |
| RAM |
8k Byte internal 32k Byte external |
typical use for stack and variables malloc allocation space, zero wait state |
| Maximum Current |
< 40 mA |
At battery terminals, including display and |
| Typical Current |
10 ... 15 mA |
Typical operation using power management idle saving |
| Soft-Off Current |
< 0.5mA |
Mainly caused by external SRAM |
GPS Module
| Parameter |
Value |
Comment |
| GPS Module Type |
||
| Supply Voltage |
3.3 V |
Under normal conditions we observed save operation for a battery voltage as low as 3V. |
| Supply Current |
~40 mA |
Depends on state of operation |
SD Card Interface
| Parameter |
Value |
Comment |
| SD Card Type |
Micro SD |
|
| Access Method |
SPI |
|
| Supported Memory Size |
Full System Data
This section provides data for the full system including GPS module.
| Parameter |
Value |
Comment |
| Board Size |
160 x 140 mm2 |
Bare Board |
| Power Supply Options |
3x AA Battery |
Alcaline |
| USB |
Main Controller only, |
|
| Operating Time |
> 40 hours |
With GPS in operation |
| Operating Temperature |
-10 ... +40 deg C |
Current conservative guess |
| RS 232 interface |
RJ11-4 |
Saves cost and space |