Hardware Reference
In-Depth Information
VDD_5V
The 5.0 V power supply (
VDD_5V
) pins can be shared by all capes to supply power,
but the total combined consumption of all the capes should be less than 2 A (1 A
per
VDD_5V
pin). It is possible for one, and only one, of the capes to
provide
power
to this pin rather than consume it, and it should provide at least 3 A to ensure proper
system function. Note that when no voltage is applied to the DC connector, nor
from a cape, these pins will not be powered, even if power is provided via USB.
SYS_5V
The regulated 5.0 V power supply (
SYS_5V
) pins can be shared by all capes to
supply power, but the total combined consumption of all the capes should be less
than 500 mA (250 mA per
SYS_5V
pin).
VADC
and
AGND
The ADC reference voltage pins can be shared by all capes.
I2C2_SCL
and
I2C2_SDA
I
2
C is a shared bus, and the
I2C2_SCL
and
I2C2_SDA
pins default to having this
bus enabled for use by cape expansion ID EEPROMs.
