LM3S8930 Luminary Micro, Inc, LM3S8930 Datasheet - Page 32

• Manufacturer Part Number: LM3S8930
• Description: Lm3s8930 Arm Microcontroller
• Manufacturer: Luminary Micro, Inc

Architectural Overview
1.4.3.3
1.4.3.4
1.4.3.5
1.4.4
1.4.4.1
32
I
The Inter-Integrated Circuit (I
(a serial data line SDA and a serial clock line SCL).
The I
devices, LCDs, tone generators, and so on. The I
diagnostic purposes in product development and manufacture.
The LM3S8930 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 374)
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 LM3S8930 includes two CAN units.
Ethernet Controller (see page 415)
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 161)
General-purpose input/output (GPIO) pins offer flexibility for a variety of connections.
2
C (see page 339)
2
C bus interfaces to external I
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).
2
C bus can be designated as either a master or a slave. The I
2
C bus. The I
2
C) bus provides bi-directional data transfer through a two-wire design
2
2
C bus supports devices that can both transmit and receive (write
C devices such as serial memory (RAMs and ROMs), networking
Preliminary
2
C module that provides the ability to communicate to other
2
2
C bus may also be used for system testing and
C modes are: Master Transmit, Master Receive,
2
C master generates interrupts when
2
C slave generates
2
C module supports
July 25, 2008