AT91SAM7X128 Atmel, AT91SAM7X128 Datasheet - Page 505
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AT91SAM7X128
Manufacturer Part Number
AT91SAM7X128
Description
MCU 32-Bit 91S ARM7TDMI RISC 128KB Flash 1.8V/3.3V 100-Pin LQFP
Manufacturer
Atmel
Datasheet
1.AT91SAM7X512-AU-999.pdf
(687 pages)
Specifications of AT91SAM7X128
Package
100LQFP
Device Core
ARM7TDMI
Family Name
91S
Maximum Speed
55 MHz
Ram Size
32 KB
Program Memory Size
128 KB
Operating Supply Voltage
1.8|3.3 V
Data Bus Width
32 Bit
Program Memory Type
Flash
Number Of Programmable I/os
62
Interface Type
CAN/Ethernet/SPI/I2S/TWI/USART/USB
On-chip Adc
8-chx10-bit
Operating Temperature
-40 to 85 °C
Number Of Timers
3
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36. Controller Area Network (CAN)
36.1
6120H–ATARM–17-Feb-09
Overview
The CAN controller provides all the features required to implement the serial communication
protocol CAN defined by Robert Bosch GmbH, the CAN specification as referred to by
ISO/11898A (2.0 Part A and 2.0 Part B) for high speeds and ISO/11519-2 for low speeds. The
CAN Controller is able to handle all types of frames (Data, Remote, Error and Overload) and
achieves a bitrate of 1 Mbit/sec.
CAN controller accesses are made through configuration registers. 8 independent message
objects (mailboxes) are implemented.
Any mailbox can be programmed as a reception buffer block (even non-consecutive buffers).
For the reception of defined messages, one or several message objects can be masked without
participating in the buffer feature. An interrupt is generated when the buffer is full. According to
the mailbox configuration, the first message received can be locked in the CAN controller regis-
ters until the application acknowledges it, or this message can be discarded by new received
messages.
Any mailbox can be programmed for transmission. Several transmission mailboxes can be
enabled in the same time. A priority can be defined for each mailbox independently.
An internal 16-bit timer is used to stamp each received and sent message. This timer starts
counting as soon as the CAN controller is enabled. This counter can be reset by the application
or automatically after a reception in the last mailbox in Time Triggered Mode.
The CAN controller offers optimized features to support the Time Triggered Communication
(TTC) protocol.
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