LM3S9B81 Datasheet, PDF (1035/1155 Pages) Texas Instruments – Stellaris® LM3S9B81 Microcontroller

Stellaris® LM3S9B81 Microcontroller
Table 23-3. Signals by Signal Name (continued)
Pin Name
U2Rx
U2Tx
USB0DM
Pin Number Pin Mux / Pin
Assignment
10
PD0 (4)
19
PG0 (1)
92
PB4 (4)
98
PD5 (9)
6
PE4 (5)
11
PD1 (4)
18
PG1 (1)
99
PD6 (9)
70
fixed
Pin Type
I
O
I/O
USB0DP
71
fixed
I/O
USB0EPEN
USB0ID
19
PG0 (7)
O
24
PC5 (6)
34
PA6 (8)
72
PB2 (8)
83
PH3 (4)
66
PB0
I
USB0PFLT
USB0RBIAS
USB0VBUS
VDD
VDDA
22
PC7 (6)
I
23
PC6 (7)
35
PA7 (8)
65
PB3 (8)
74
PE0 (9)
76
PH4 (4)
87
PJ1 (9)
73
fixed
O
67
PB1
I/O
8
fixed
-
20
32
44
56
68
81
93
3
fixed
-
VDDC
38
fixed
-
88
Buffer Type^a Description
TTL
UART module 2 receive. When in IrDA mode, this
signal has IrDA modulation.
TTL
UART module 2 transmit. When in IrDA mode, this
signal has IrDA modulation.
Analog
Analog
TTL
Bidirectional differential data pin (D- per USB
specification).
Bidirectional differential data pin (D+ per USB
specification).
Optionally used in Host mode to control an external
power source to supply power to the USB bus.
Analog
TTL
This signal senses the state of the USB ID signal.
The USB PHY enables an integrated pull-up, and
an external element (USB connector) indicates the
initial state of the USB controller (pulled down is
the A side of the cable and pulled up is the B side).
Optionally used in Host mode by an external power
source to indicate an error state by that power
source.
Analog
Analog
Power
9.1-kΩ resistor (1% precision) used internally for
USB analog circuitry.
This signal is used during the session request
protocol. This signal allows the USB PHY to both
sense the voltage level of VBUS, and pull up VBUS
momentarily during VBUS pulsing.
Positive supply for I/O and some logic.
Power
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. VDDA pins must be connected to 3.3 V,
regardless of system implementation.
Positive supply for most of the logic function,
including the processor core and most peripherals.
June 29, 2010
Texas Instruments-Advance Information
1035