LM3S9B81 Datasheet, PDF (1036/1155 Pages) Texas Instruments – Stellaris® LM3S9B81 Microcontroller

Signal Tables
Table 23-3. Signals by Signal Name (continued)
Pin Name
Pin Number Pin Mux / Pin Pin Type Buffer Type^a Description
Assignment
VREFA
90
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
25-2 on page 1082.
XTALNPHY
17
fixed
O
Analog Ethernet PHY XTALN 25-MHz oscillator crystal
output.
XTALPPHY
16
fixed
I
Analog Ethernet PHY XTALP 25-MHz oscillator crystal
input.
a. The TTL designation indicates the pin has TTL-compatible voltage levels.
Table 23-4. Signals by Function, Except for GPIO
Function
ADC
Pin Name
AIN0
AIN1
AIN2
AIN3
AIN4
AIN5
AIN6
AIN7
AIN8
AIN9
AIN10
AIN11
AIN12
AIN13
AIN14
AIN15
VREFA
Pin Number
1
2
5
6
100
99
98
97
96
95
92
91
13
12
11
10
90
Pin Type
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
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-to-digital converter input 3.
Analog Analog-to-digital converter input 4.
Analog Analog-to-digital converter input 5.
Analog Analog-to-digital converter input 6.
Analog Analog-to-digital converter input 7.
Analog Analog-to-digital converter input 8.
Analog Analog-to-digital converter input 9.
Analog Analog-to-digital converter input 10.
Analog Analog-to-digital converter input 11.
Analog Analog-to-digital converter input 12.
Analog Analog-to-digital converter input 13.
Analog Analog-to-digital converter input 14.
Analog Analog-to-digital converter input 15.
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
25-2 on page 1082.
1036
Texas Instruments-Advance Information
June 29, 2010