Dave Embedded Systems Axel ULite, Руководство по оборудованию

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AXEL ULite Hardware Manual v.1.0.2
7.2 Reset scheme and control signals
The following picture shows the simplified block diagram of reset scheme
and voltage monitoring.
The available reset signals are described in detail in the following
sections.
7.2.1 CPU_PORn
The following devices can assert this active-low signal:
●
PMIC
●
voltage monitor: this device monitors critical power voltages and
triggers a reset pulse in case any of these exhibits a brownout
condition.
Since SPI NOR flash can be used as boot device, CPU_PORn is
connected to this device too. This guarantees it is in a known state when
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Fig. 6 : Simplified block diagram of reset circuitry and voltage
monitoring