LM3S8933 Luminary Micro, Inc, LM3S8933 Datasheet - Page 35

• Manufacturer Part Number: LM3S8933
• Description: Lm3s8933 Arm Microcontroller
• Manufacturer: Luminary Micro, Inc

1.4.4.4
1.4.4.5
1.4.5
1.4.5.1
July 25, 2008
The LM3S8933 controller includes one I
IC devices over an I
and read) data.
Devices on the I
both sending and receiving data as either a master or a slave, and also supports the simultaneous
operation as both a master and a slave. The four I
Slave Transmit, and Slave Receive.
A Stellaris
Both the I
a transmit or receive operation completes (or aborts due to an error). The I
interrupts when data has been sent or requested by a master.
Controller Area Network (see page 416)
Controller Area Network (CAN) is a multicast shared serial-bus standard for connecting electronic
control units (ECUs). CAN was specifically designed to be robust in electromagnetically noisy
environments and can utilize a differential balanced line like RS-485 or a more robust twisted-pair
wire. Originally created for automotive purposes, now it is used in many embedded control
applications (for example, industrial or medical). Bit rates up to 1Mb/s are possible at network lengths
below 40 meters. Decreased bit rates allow longer network distances (for example, 125 Kb/s at
500m).
A transmitter sends a message to all CAN nodes (broadcasting). Each node decides on the basis
of the identifier received whether it should process the message. The identifier also determines the
priority that the message enjoys in competition for bus access. Each CAN message can transmit
from 0 to 8 bytes of user information. The LM3S8933 includes one CAN units.
Ethernet Controller (see page 457)
Ethernet is a frame-based computer networking technology for local area networks (LANs). Ethernet
has been standardized as IEEE 802.3. It defines a number of wiring and signaling standards for the
physical layer, two means of network access at the Media Access Control (MAC)/Data Link Layer,
and a common addressing format.
The Stellaris® Ethernet Controller consists of a fully integrated media access controller (MAC) and
network physical (PHY) interface device. The Ethernet Controller conforms to IEEE 802.3
specifications and fully supports 10BASE-T and 100BASE-TX standards. In addition, the Ethernet
Controller supports automatic MDI/MDI-X cross-over correction.
System Peripherals
Programmable GPIOs (see page 169)
General-purpose input/output (GPIO) pins offer flexibility for a variety of connections.
The Stellaris
an individual GPIO port. The GPIO module is FiRM-compliant (compliant to the ARM Foundation
IP for Real-Time Microcontrollers specification) and supports 6-36 programmable input/output pins.
The number of GPIOs available depends on the peripherals being used (see “Signal Tables” on page
517 for the signals available to each GPIO pin).
The GPIO module features programmable interrupt generation as either edge-triggered or
level-sensitive on all pins, programmable control for GPIO pad configuration, and bit masking in
2
®
C master and slave can generate interrupts. The I
I
®
2
C module can operate at two speeds: Standard (100 Kbps) and Fast (400 Kbps).
GPIO module is comprised of seven physical GPIO blocks, each corresponding to
2
C bus can be designated as either a master or a slave. The I
2
C bus. The I
2
C bus supports devices that can both transmit and receive (write
Preliminary
2
C module that provides the ability to communicate to other
2
C modes are: Master Transmit, Master Receive,
2
C master generates interrupts when
LM3S8933 Microcontroller
2
C slave generates
2
C module supports
35