LM3S1969 Datasheet, PDF (620/677 Pages) Texas Instruments – Stellaris® LM3S1969 Microcontroller

Signal Tables
OBSOLETE: TI has discontinued production of this device.
Table 19-2. Signals by Signal Name (continued)
Pin Name
Pin Number Pin Type Buffer Type^a Description
U0Rx
26
I
TTL
UART module 0 receive. When in IrDA mode, this signal has
IrDA modulation.
U0Tx
27
O
TTL
UART module 0 transmit. When in IrDA mode, this signal has
IrDA modulation.
U1Rx
12
I
TTL
UART module 1 receive. When in IrDA mode, this signal has
IrDA modulation.
U1Tx
13
O
TTL
UART module 1 transmit. When in IrDA mode, this signal has
IrDA modulation.
U2Rx
19
I
TTL
UART module 2 receive. When in IrDA mode, this signal has
IrDA modulation.
U2Tx
18
O
TTL
UART module 2 transmit. When in IrDA mode, this signal has
IrDA modulation.
VBAT
55
-
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
8
-
Power Positive supply for I/O and some logic.
20
32
44
56
68
81
93
VDD25
14
-
Power Positive supply for most of the logic function, including the
38
processor core and most peripherals.
62
88
VDDA
3
-
Power The positive supply for the analog circuits (ADC, Analog
98
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 “Recommended DC
Operating Conditions” on page 628, regardless of system
implementation.
WAKE
50
I
TTL
An external input that brings the processor out of Hibernate
mode when asserted.
XOSC0
52
I
Analog 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.
XOSC1
53
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.
620
July 24, 2012
Texas Instruments-Production Data