LM3S5K36 Datasheet, PDF (975/1050 Pages) Texas Instruments – Stellaris® LM3S5K36 Microcontroller

Stellaris^® LM3S5K36 Microcontroller
Table 22-3. Signals by Signal Name (continued)
Pin Name
Pin Number Pin Mux / Pin Pin Type Buffer Type^a Description
Assignment
USB0DM
45
fixed
I/O
Analog Bidirectional differential data pin (D- per USB
specification) for USB0.
USB0DP
46
fixed
I/O
Analog Bidirectional differential data pin (D+ per USB
specification) for USB0.
USB0RBIAS
48
fixed
O
Analog 9.1-kΩ resistor (1% precision) used internally for
USB analog circuitry.
VBAT
37
fixed
-
Power Power source for the Hibernation module. It is
normally connected to the positive terminal of a
battery and serves as the battery
backup/Hibernation module power-source supply.
VDD
12
fixed
-
Power Positive supply for I/O and some logic.
28
43
59
VDDA
3
fixed
-
Power 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 Table 24-2 on page 986, regardless
of system implementation.
VDDC
9
fixed
23
38
54
-
Power Positive supply for most of the logic function,
including the processor core and most peripherals.
The voltage on this pin is 1.3 V and is supplied by
the on-chip LDO. The VDDC pins should only be
connected to the LDO pin and an external capacitor
as specified in Table 24-6 on page 991.
VREFA
56
PB6
I
Analog This input provides a reference voltage used to
specify the input voltage at which the ADC converts
to a maximum value. In other words, the voltage
that is applied to VREFA is the voltage with which
an AINn signal is converted to 1023. The VREFA
input is limited to the range specified in Table
24-23 on page 998 .
WAKE
32
fixed
I
TTL
An external input that brings the processor out of
Hibernate mode when asserted.
XOSC0
34
fixed
I
Analog Hibernation module oscillator crystal input or an
external clock reference input. Note that this is
either a 4.194304-MHz crystal or a 32.768-kHz
oscillator for the Hibernation module RTC. See the
CLKSEL bit in the HIBCTL register.
XOSC1
35
fixed
O
Analog Hibernation module oscillator crystal output. Leave
unconnected when using a single-ended clock
source.
a. The TTL designation indicates the pin has TTL-compatible voltage levels.
January 21, 2012
975
Texas Instruments-Production Data