Keypad Interface - Quectel M10 Hardware Design

M10 Hardware Design
VPP C6
SIM_DATA C7
SIM_DETECT C8

3.11. Keypad interface

The keypad interface consists of 5 keypad column inputs and 5 keypad row outputs. The basic
configuration is 5 keypad columns and 5 keypad rows, giving 25 keys.
Table 17: Pin definition of the keypad interface
Name
KBC0
KBC1
KBC2
KBC3
KBC4
KBR0
KBR1
KBR2
KBR3
KBR4
The keypad interface allows a direct external matrix connection. A typical recommended circuit
about the keypad is shown in the following figure.
M10_HD_V3.0
Not Connect
SIM Card Data I/O
Pulled down GND with external circuit. When the tray is
present, C4 is connected to C8.
Pin Function
33
34
35 Keypad matrix column
36
37
28
29
30 Keypad matrix row
31
32
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