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Category | Feature | Spec |
Microcontroller | Chipset | MT2502A (Aster) |
Core | ARM7 EJ-S™ | |
Clock Speed | 260MHz | |
PCB Size | Dimensions | 3.3 * 2.1 in |
Memory | Flash | 16MB |
RAM | 4MB | |
Power | Battery Jack | 3.7~4.2V Li-battery |
DC Current Per I/O Pin | 0.3~3mA | |
Digital IO Pins | Pin Count | 16 (D0~D13, SDA, SCL) |
Voltage | 3.3v | |
Analog Input Pins | Pin Count | 4 (A0, A1, A2) |
Voltage | 0~5V | |
PWM Output Pins | Pin Count | 2 (D3 and D9) |
Voltage | 3.3v | |
Max Resolution | 13bit | |
Frequency (Resolution) | 1.6KHz (13bit) | |
50.8KHz (8bit) | ||
800KHz (4bit) | ||
(customizable) | ||
External Interrupts | Pin Count | 2 (D2 and D3) |
I2C (master only) | Set Count | 1 (SDA, SCL) |
Speed | 100Kbps, 400Kbps, 3.4Mbps | |
SPI (master only) | Set Count | 1 (MOSI, MISO, SCK, SS) |
Speed | 104Kbps~26Mbps | |
UART | Set Count | 1 (TX/RX) |
Voltage | 3.3v | |
UART on USB | Set Count | 1 |
Communications | GSM | 850/900/1800/1900MHz |
GPRS | Class 12 | |
BT | BR/EDR/BLE (Dual Mode) | |
Wi-Fi (MT5931) | 802.11 b/g/n | |
Positioning | GPS (MT3332) | GPS/GLONASS/BEIDOU |
User Storage | Flash | 10MB |
SD Card | Up to 32GB (Class 10) | |
Executable Size | RAM (Code+RO+RW+ZI+Heap) | 2MB |
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October 6, 2015