Reset, Wake, Boot, And General-Purpose Push-Buttons - Analog Devices ADZS-U4050LF-EZKIT User Manual

UG-1163

Reset, Wake, Boot, and General-Purpose Push-Buttons

The ADZS-U4050LF-EZKIT board has five push-buttons (see
Figure 4) responsible for different operations.

The boot mode select switch (SW1) determines the boot
mode of the processor. By default, the processor boots
from the internal flash memory. When pressed, the UART
download mode is triggered. For full details, see the
ADuCM4050 EZ-Kit® Manual, Revision 1.0 for further
information, which can be found in the Documentation
section of the ADuCM4050
included in the downloadable board support package for
theADuCM4050).

The reset switch (SW2) resets the

The wake switch (SW3) is connected to the processor wake
signals, and is used to wake up the processor during low
power modes. Depending on the configuration of JP10, the
different external interrupts to wake up the
microcontroller.
product page (this manual is
ADuCM4050 processor.
Figure 4. ADZS-U4050LF-EZKIT Push-Buttons Located Near the LEDs
ADZS-U4050LF-EZKIT

The PB1 switch (SW4) is a general-purpose switch connected
to general-purpose input/output (GPIO) P2_09.

The PB2 switch (SW5) is a general-purpose switch connected
to GPIO P2_06.

Table 4 shows which pins must be shorted on JP10 to choose
which external interrupt is connected to the WAKE switch.

The PB1 switch (SW4) is a general-purpose switch connected
to general-purpose input/output (GPIO) P2_09.

The PB2 switch (SW5) is a general-purpose switch connected
to GPIO P2_06.
Table 4. External Interrupt Choice for the WAKE Switch
Pin Number
1, 2
3, 4
5, 6
7, 8
Rev. 0 | Page 6 of 31
User Guide
Signal Name
SYS_WAKE0
SYS_WAKE1
SYS_WAKE2
SYS_WAKE3