Datasheet

Table 31-3. Signals by Signal Name (continued)
DescriptionBuffer TypePin TypePin Mux / Pin
Assignment
Pin NumberPin Name
The positive supply for the analog circuits (ADC,
Analog Comparators, etc.). These are separated
from VDD to minimize the electrical noise contained
on VDD from affecting the analog functions. VDDA
pins must be supplied with a voltage that meets the
specification in , regardless of system
implementation.
Power-fixedF3VDDA
Positive supply for most of the logic function,
including the processor core and most peripherals.
The voltage on this pin is 1.2 V and is supplied by
the on-chip LDO. The VDDC pins should only be
connected to each other and an external capacitor
as specified in Table 32-15 on page 2114 .
Power-fixedH16
E10
VDDC
A reference voltage used to specify the voltage at
which the ADC converts to a maximum value. This
pin is used in conjunction with VREFA-, which
specifies the minimum value . The voltage that is
applied to VREFA+ is the voltage with which an
AINn signal is converted to 4095. The VREFA+
voltage is limited to the range specified in Table
32-44 on page 2136.
Analog-fixedF4VREFA+
A reference voltage used to specify the input
voltage at which the ADC converts to a minimum
value. This pin is used in conjunction with VREFA+,
which specifies the maximum value. In other words,
the voltage that is applied to VREFA- is the voltage
with which an AINn signal is converted to 0, while
the voltage that is applied to VREFA+ is the voltage
with which an AINn signal is converted to 4095.
The VREFA- voltage is limited to the range specified
in Table 32-44 on page 2136.
Analog-fixedG5VREFA-
An external input that brings the processor out of
Hibernate mode when asserted.
TTLIfixedU18WAKE
Hibernation module oscillator crystal input or an
external clock reference input. Note that this is
either a crystal or a 32.768-kHz oscillator for the
Hibernation module RTC.
AnalogIfixedT18XOSC0
Hibernation module oscillator crystal output. Leave
unconnected when using a single-ended clock
source.
AnalogOfixedT19XOSC1
31.3 Signals by Function, Except for GPIO
Table 31-4. Signals by Function, Except for GPIO
DescriptionBuffer TypePin TypePin NumberPin NameFunction
1-Wire Optional 2nd signal to be used as output.TTLI/OK15
B12
OWALT
1-Wire
1-Wire Single Bus Pin. This signal is input only if
1-Wire Alternate Output is enabled.
TTLI/OG2
K17
V12
U14
D8
A8
OWIRE
December 13, 20132070
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Signal Tables