Table
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| PIN | |
| Pin |
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| Name |
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| Direction |
| Function |
| Connection | |
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| Required | |
| 1 |
|
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| VCC |
|
| Input |
| DC power |
|
| Yes |
| 2 |
|
| GND |
| - |
| Ground |
|
| Yes | ||
| 3 |
|
|
| VCC |
|
| Input |
| DC power |
|
| Yes |
| 4 |
|
| GND |
| - |
| Ground |
|
| Yes | ||
| 5 |
|
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| VCC |
|
| Input |
| DC power |
|
| Yes |
| 6 |
|
| GND |
| - |
| Ground |
|
| Yes | ||
| 7 |
|
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| VCC |
|
| Input |
| DC power |
|
| Yes |
| 8 |
|
| GND |
| - |
| Ground |
|
| Yes | ||
| 9 |
|
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| VCC |
|
| Input |
| DC power |
|
| Yes |
| 10 |
|
| GND |
| - |
| Ground |
|
| Yes | ||
| 11 |
|
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| CHG_IN |
|
| Input |
| Battery charger power |
|
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| 12 |
|
| GND |
| - |
| Ground |
|
| Yes | ||
13 |
|
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| ADIN4 |
|
| Input |
| ADC Input 4 |
|
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| GPIO5 |
|
| In/Out |
| General purpose IO |
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| 14 |
|
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| ON/OFF |
|
| Input |
| Device on/off control |
|
| Yes |
| 15 |
|
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| SIMVCC |
|
| Output |
| 1.8V or 3.0V SIM card supply |
|
| Yes1 |
| 16 |
|
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| SIMDET |
|
| Input |
| SIM presence detection |
|
| Yes1 |
| 17 |
|
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| SIMRST |
|
| Output |
| SIM card reset signal |
|
| Yes1 |
| 18 |
|
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| SIMDAT |
|
| In/Out |
| SIM card data |
|
| Yes1 |
| 19 |
|
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| SIMCLK |
|
| Output |
| SIM card clock signal |
|
| Yes1 |
| 20 |
|
| DAC |
|
| Output |
| Pulse width modulated signal |
|
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| |
| 21 |
|
| GPIO1 |
|
| In/Out |
| General purpose IO |
|
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| |
| 22 |
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| GPIO2 |
|
| In/Out |
| General purpose IO |
|
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| |
| 23 |
|
| GPIO3 |
|
| In/Out |
| General purpose IO |
|
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| |
| 24 |
|
| GPIO4 |
|
| In/Out |
| General purpose IO |
|
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| |
| 25 |
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| VRTC |
|
| Input |
| DC supply for real time clock |
|
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| 26 |
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| ADIN1 |
|
| Input |
| ADC Input 1 |
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| 27 |
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| ADIN2 |
|
| Input |
| ADC Input 2 |
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| 28 |
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| ADIN3 |
|
| Input |
| ADC Input 3 |
|
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| 29 |
|
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| SDA |
|
| In/Out |
| I2C data |
|
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| 30 |
|
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| SCL |
|
| Output |
| I2C clock signal |
|
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| 31 |
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| BUZZER |
|
| Output |
| Buzzer Output |
|
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32 |
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| DSR1 |
|
| Output |
| Data Set Ready (UART1) |
|
| Yes2 | |
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| GPIO7 |
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| In/Out |
| General purpose IO |
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33 |
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| LED |
|
| Output |
| LED control signal |
|
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| GPIO6 |
|
| In/Out |
| General purpose IO |
|
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34 |
|
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| VREF |
|
| In (Out) |
| Core voltage reference |
|
| Yes | |
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LZT 123 1834 |
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| 30 | ||||