Smart Machine Smart Decision
Table 19: Pin description
Pin name
Pin No.
Function
KEYSENSE_N0
22
KEYSENSE_N1
23
KEYSENSE_N2
19
KEYSENSE_N3
18
KEYSENSE_N4
14
Sensing keys
KEYPAD_0
21
KEYPAD_1
17
KEYPAD_2
20
KEYPAD_3
15
KEYPAD_4
16
Driving pads
3.7.2
Application Guide
All keypad pins can be configured for GPIOs. These GPIOs also support interruption operation if used as
input pins. A typical circuit about the keypad (5*5 keypad matrix) is shown in the following figure.
Figure 27: Reference circuit
If these pins are configured for GPIOs, the sequence is listed in the following table.
SIM5320J-TE_Hardware Design_V1.01
2012-11-09
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