Preliminary User's Manual l MBLS1012AL UM 0001 l © 2019, TQ-Systems GmbH
Page 29
4.5.6
Push buttons
For development purposes, the MBLS1012AL has three push buttons connected to the port expanders. By using the interrupt
signals at GPIO1_24 and GPIO1_27 interrupts can be triggered with the push buttons. The signal lines between the push button
and the port expander are equipped with 10 kΩ pull-up resistors.
PCA9538
TQMLS1012AL
GPIO1_24
Push button S2
PCA9555
I2C
IO1_8
INT#
I2C_3V3
IO_4
IO_5
I2C
INT#
I2C_1V8
Push button X16
Push button X15
GPIO1_27
Illustration 28:
Block diagram push buttons
Illustration 29:
Position of push buttons
Table 35:
Push buttons
Push button
Function
S2
GPIO
S15
GPIO
S16
GPIO
4.5.7
Reset Push button
For information on reset and reset button, see section 4.3.