LM3S2965-IRN50-A1T ETC2 [List of Unclassifed Manufacturers], LM3S2965-IRN50-A1T Datasheet - Page 33
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LM3S2965-IRN50-A1T
Manufacturer Part Number
LM3S2965-IRN50-A1T
Description
Microcontroller
Manufacturer
ETC2 [List of Unclassifed Manufacturers]
Datasheet
1.LM3S2965-IRN50-A1T.pdf
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1.4.3.2
1.4.4
1.4.4.1
1.4.4.2
November 30, 2007
Analog Comparators (see page 451)
An analog comparator is a peripheral that compares two analog voltages, and provides a logical
output that signals the comparison result.
The LM3S2965 microcontroller provides three independent integrated analog comparators that can
be configured to drive an output or generate an interrupt or ADC event.
A comparator can compare a test voltage against any one of these voltages:
■
■
■
The comparator can provide its output to a device pin, acting as a replacement for an analog
comparator on the board, or it can be used to signal the application via interrupts or triggers to the
ADC to cause it to start capturing a sample sequence. The interrupt generation and ADC triggering
logic is separate. This means, for example, that an interrupt can be generated on a rising edge and
the ADC triggered on a falling edge.
Serial Communications Peripherals
The LM3S2965 controller supports both asynchronous and synchronous serial communications
with:
■
■
■
■
UART (see page 297)
A Universal Asynchronous Receiver/Transmitter (UART) is an integrated circuit used for RS-232C
serial communications, containing a transmitter (parallel-to-serial converter) and a receiver
(serial-to-parallel converter), each clocked separately.
The LM3S2965 controller includes three fully programmable 16C550-type UARTs that support data
transfer speeds up to 460.8 Kbps. (Although similar in functionality to a 16C550 UART, it is not
register-compatible.) In addition, each UART is capable of supporting IrDA.
Separate 16x8 transmit (TX) and 16x12 receive (RX) FIFOs reduce CPU interrupt service loading.
The UART can generate individually masked interrupts from the RX, TX, modem status, and error
conditions. The module provides a single combined interrupt when any of the interrupts are asserted
and are unmasked.
SSI (see page 338)
Synchronous Serial Interface (SSI) is a four-wire bi-directional communications interface.
The LM3S2965 controller includes two SSI modules that provide the functionality for synchronous
serial communications with peripheral devices, and can be configured to use the Freescale SPI,
MICROWIRE, or TI synchronous serial interface frame formats. The size of the data frame is also
configurable, and can be set between 4 and 16 bits, inclusive.
An individual external reference voltage
A shared single external reference voltage
A shared internal reference voltage
Three fully programmable 16C550-type UARTs
Two SSI modules
Two I
Two CAN units
2
C modules
Preliminary
LM3S2965 Microcontroller
33
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