LM3S2939 Datasheet, PDF (685/749 Pages) Texas Instruments – Stellaris® LM3S2939 Microcontroller

Stellaris^® LM3S2939 Microcontroller
Table 20-6. Signals by Signal Name (continued)
Pin Name
Pin Number Pin Type Buffer Type^a Description
CMOD1
B10
I
TTL
CPU Mode bit 1. Input must be set to logic 0 (grounded); other
encodings reserved.
Fault
F2
I
TTL
PWM Fault.
GND
B6
-
Power Ground reference for logic and I/O pins.
C4
C5
F10
F11
F12
H3
J3
J10
K5
K6
K10
L10
GNDA
A5
-
Power The ground reference for the analog circuits (ADC, Analog
B5
Comparators, etc.). These are separated from GND to
minimize the electrical noise contained on VDD from affecting
the analog functions.
HIB
I2C0SCL
I2C0SDA
M12
O
C11
I/O
C12
I/O
OD
An open-drain output with internal pull-up that indicates the
processor is in Hibernate mode.
OD
I²C module 0 clock.
OD
I²C module 0 data.
IDX0
F1
I
TTL
QEI module 0 index.
LDO
E3
-
Power Low drop-out regulator output voltage. This pin requires an
external capacitor between the pin and GND of 1 µF or
greater. The LDO pin must also be connected to the VDD25
pins at the board level in addition to the decoupling
capacitor(s).
NC
A2
-
-
No connect. Leave the pin electrically unconnected/isolated.
A3
A4
B2
B4
C1
C2
D2
OSC0
L11
I
Analog Main oscillator crystal input or an external clock reference
input.
OSC1
M11
O
Analog Main oscillator crystal output. Leave unconnected when using
a single-ended clock source.
PA0
L3
I/O
TTL
GPIO port A bit 0.
PA1
M3
I/O
TTL
GPIO port A bit 1.
PA2
M4
I/O
TTL
GPIO port A bit 2.
PA3
L4
I/O
TTL
GPIO port A bit 3.
PA4
L5
I/O
TTL
GPIO port A bit 4.
PA5
M5
I/O
TTL
GPIO port A bit 5.
PA6
L6
I/O
TTL
GPIO port A bit 6.
PA7
M6
I/O
TTL
GPIO port A bit 7.
June 18, 2012
685
Texas Instruments-Production Data