LM3S6952 Datasheet, PDF (557/626 Pages) Texas Instruments – Stellaris LM3S6952 Microcontroller

Stellaris® LM3S6952 Microcontroller
Table 21-2. Signals by Signal Name (continued)
Pin Name
Pin Number Pin Type Buffer Type^a Description
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 (3.3 V) for the analog circuits (ADC,
98
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 connected
to 3.3 V, 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 4.194304-MHz crystal
or a 32.768-kHz oscillator for the Hibernation module RTC.
See the CLKSEL bit in the HIBCTL register.
XOSC1
53
O
Analog Hibernation module oscillator crystal output. Leave
unconnected when using a single-ended clock source.
XTALNPHY
17
O
TTL
Ethernet PHY XTALN 25-MHz oscillator crystal output. Leave
unconnected when using a single-ended 25-MHz clock input
connected to the XTALPPHY pin.
XTALPPHY
16
I
TTL
Ethernet PHY XTALP 25-MHz oscillator crystal input or
external clock reference input.
a. The TTL designation indicates the pin has TTL-compatible voltage levels.
Table 21-3. Signals by Function, Except for GPIO
Function
Pin Name
ADC
ADC0
ADC1
ADC2
Analog Comparators C0+
C0-
C0o
C1+
C1-
C1o
C2+
C2-
Pin Number
1
2
5
90
92
90
24
91
24
23
22
Pin Type
I
I
I
I
I
O
I
I
O
I
I
Buffer Type^a
Description
Analog Analog-to-digital converter input 0.
Analog Analog-to-digital converter input 1.
Analog Analog-to-digital converter input 2.
Analog Analog comparator 0 positive input.
Analog Analog comparator 0 negative input.
TTL
Analog comparator 0 output.
Analog Analog comparator 1 positive input.
Analog Analog comparator 1 negative input.
TTL
Analog comparator 1 output.
Analog Analog comparator 2 positive input.
Analog Analog comparator 2 negative input.
April 05, 2010
557
Texas Instruments-Production Data