LM3S3748 Datasheet, PDF (675/753 Pages) List of Unclassifed Manufacturers – Microcontroller

LM3S3748 Microcontroller
22
Signal Tables
The following tables list the signals available for each pin. Functionality is enabled by software with
the GPIOAFSEL register.
Important: All multiplexed pins are GPIOs by default, with the exception of the four JTAG pins
(PC[3:0]) which default to the JTAG functionality.
Table 22-1 on page 675 shows the pin-to-signal-name mapping, including functional characteristics
of the signals. Table 22-2 on page 679 lists the signals in alphabetical order by signal name.
Table 22-3 on page 684 groups the signals by functionality, except for GPIOs. Table 22-4 on page
687 lists the GPIO pins and their alternate functionality.
Table 22-1. Signals by Pin Number
Pin Number
1
2
3
Pin Name
PE7
ADC0
PE6
ADC1
VDDA
Pin Type
I/O
I
I/O
I
-
4
GNDA
-
5
PE5
I/O
ADC2
I
6
PE4
I/O
ADC3
I
7
LDO
-
8
VDD
-
9
GND
-
10
PD0
I/O
IDX0
I
11
PD1
I/O
PhA0
I
12
PD2
I/O
CCP5
I/O
13
PD3
I/O
CCP0
I/O
Buffer Type Description
Analog GPIO port E bit 7
Analog ADC 0 input
Analog GPIO port E bit 6
Analog ADC 1 input
Power
The positive supply (3.3 V) 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.
Power
The ground reference for the analog circuits
(ADC, Analog Comparators, etc.). These are
separated from GND to minimize the electrical
noise contained on VDD from affecting the
analog functions.
Analog GPIO port E bit 5
Analog ADC 2 input
Analog GPIO port E bit 4
Analog ADC 3 input
Power
Low drop-out regulator output voltage. This
pin requires an external capacitor between
the pin and GND of 1 µF or greater.
Power Positive supply for I/O and some logic.
Power Ground reference for logic and I/O pins.
TTL
GPIO port D bit 0
TTL
QEI module 0 index
TTL
GPIO port D bit 1
TTL
QEI module 0 Phase A
TTL
GPIO port D bit 2
TTL
Capture/Compare/PWM 5
TTL
GPIO port D bit 3
TTL
Capture/Compare/PWM 0
April 08, 2008
675
Preliminary