RM46L450_15 Datasheet, PDF (151/189 Pages) Texas Instruments – 16- and 32-Bit RISC Flash Microcontroller

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RM46L450, RM46L850
SPNS184C – SEPTEMBER 2012 – REVISED JUNE 2015
7.7 Controller Area Network (DCAN)
The DCAN supports the CAN 2.0B protocol standard and uses a serial, multimaster communication
protocol that efficiently supports distributed real-time control with robust communication rates of up to 1
megabit per second (Mbps). The DCAN is ideal for applications operating in noisy and harsh
environments (for example, automotive and industrial fields) that require reliable serial communication or
multiplexed wiring.
7.7.1 Features
Features of the DCAN module include:
• Supports CAN protocol version 2.0 part A, B
• Bit rates up to 1 MBit/s
• The CAN kernel can be clocked by the oscillator for baud-rate generation.
• 64 mailboxes on each DCAN
• Individual identifier mask for each message object
• Programmable FIFO mode for message objects
• Programmable loop-back modes for self-test operation
• Automatic bus on after Bus-Off state by a programmable 32-bit timer
• Message RAM protected by parity
• Direct access to Message RAM during test mode
• CAN Rx / Tx pins configurable as general purpose IO pins
• Message RAM Auto Initialization
• DMA support
For more information on the DCAN see the RM46x Technical Reference Manual (SPNU514).
7.7.2 Electrical and Timing Specifications
Table 7-26. Dynamic Characteristics for the DCANx TX and RX pins
Parameter
t_d(CANnTX)
Delay time, transmit shift register to CANnTX pin⁽¹⁾
t_d(CANnRX)
Delay time, CANnRX pin to receive shift register
(1) These values do not include rise/fall times of the output buffer.
MIN
MAX
Unit
15
ns
5
ns
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Peripheral Information and Electrical Specifications 151
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