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Functional Blocks Description
2
Functional Blocks Description
The complete AM437x GP EVM is contained mostly within a single board. The GP EVM can also have a
camera and wireless board.
Figure 3. AM437x EVM System Block Diagram
2.1
Processor
The AM437x processor is the central processor to this EVM. All the resources on the board surround the
AM437x processor to provide development capabilities for hardware and software. See the
AM437x data
sheet
and TRM for the details about the processor.
System configuration signals (sysboot0 to 18) can be set on the EVM using resistors and switches to
define some startup parameters on the AM437x processor. See
Section 4
for more details.
2.2
Clocks
The EVM has several clocks to support the AM437x processor. The main clock for the processor is
derived from a 24-MHz crystal. AM437x generates the base clock and subsequent module clocks as
needed within the AM437x processor. A 32-kHz clock for the RTC on the AM437x is derived from a
32.768-kHz crystal on the board.
2.3
Reset Signals
SYS_RESETn is a reset signal running to several peripherals and AM437x which performs a reset on
those peripherals. SYS_RESETn is asserted by the push-button and is used to force a reset of the
AM437x and the other peripherals. AM437x can also pull down the RESET_INOUTn signal to cause the
SYS_RESETn line to activate. The power-on reset to the processor is driven from the power good signal
of the power manager. Also, a reset push-button is provided for the power on reset of the board.
3
SPRUHW7 – June 2014
AM437x GP EVM Hardware User's Guide
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