LM3S2793 Datasheet, PDF (1105/1194 Pages) Texas Instruments – Stellaris® LM3S2793 Microcontroller

Stellaris^® LM3S2793 Microcontroller
Table 23-8. Signals by Signal Name (continued)
Pin Name
Pin Number Pin Mux / Pin Pin Type Buffer Type^a Description
Assignment
U2Rx
G1
PD0 (4)
I
K1
PG0 (1)
A6
PB4 (4)
C6
PD5 (9)
TTL
UART module 2 receive. When in IrDA mode, this
signal has IrDA modulation.
U2Tx
B2
PE4 (5)
O
G2
PD1 (4)
K2
PG1 (1)
A3
PD6 (9)
TTL
UART module 2 transmit. When in IrDA mode, this
signal has IrDA modulation.
VBAT
L12
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
K7
fixed
-
Power Positive supply for I/O and some logic.
G12
K8
K9
H10
G10
E10
G11
VDDA
C7
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 25-2 on page 1123, regardless
of system implementation.
VDDC
D3
fixed
C3
-
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 25-6 on page 1128.
VREFA
A7
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
25-26 on page 1140 .
WAKE
M10
fixed
I
TTL
An external input that brings the processor out of
Hibernate mode when asserted.
XOSC0
K11
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
K12
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 20, 2012
Texas Instruments-Production Data
1105