M10 Hardware Design
KBR4
KBR3
KBR2
KBR1
KBR0
KBC0
KBC1
KBC2
KBC3
KBC4
MODULE
GPIO1_KBC5
Figure 32: Reference circuit of the keypad interface
If 5×5 matrix couldn’t provide enough keys, GPIO1 can be multiplex as KBC5 to configure a 5
×6 matrix. And then, the keypad interface can consists of 5 keypad row outputs and 6 keypad
column inputs. The basic configuration is 5 keypad rows and 6 keypad columns, giving 30 keys.
Note: This function is not supported in the default firmware. There must be special firmware if
you want. Please contact Quectel for more details.
3.14 ADC
The module provides two auxiliary ADC to measure the values of voltage. AT command
“AT+QADC” to read the voltage value added on ADC0 pin. For detail of this AT command,
please refer to document [1].
To get the battery temperature, M10 provide the TEMP_BAT pin, which is internal pulled-up to
2.8V through 10Kohm. The battery pack should include an NTC resistor. If the NTC is not inside
the battery, it must be in thermal contact with the battery. The NTC resistor must be connected
between TEMP_BAT and GND. The requirement is: R
NTC
≈ 10kΩ @ 25°C.
Note: This function is not supported in the default firmware. There must be special firmware if
you require. Please contact Quectel for more details.
M10_HD_V1.00 - 50 -
To Next Page
Loading...
Need help?
General
