Overview Of Functions; Table 18-1: Overview Of Functions - NEC V850E/PH2 User Manual

18.1.1 Overview of functions

Table 18-1 presents an overview of the CAN Controller functions.
Function
Protocol
Baud rate
Data storage
Number of messages
Message reception
Message transmission
Remote frame processing
Time stamp function
Diagnostic function
Release from bus-off state • Forced release from bus-off (by ignoring timing constraint) possible by software.
Power save mode
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Chapter 18 AFCAN Controller

Table 18-1: Overview of Functions

CAN protocol ISO 11898 (standard and extended frame transmission/reception)
Maximum 1 Mbps (CAN clock input ≥ 8 MHz)
Storing messages in the CAN RAM
• 32 message buffers per channel
• Each message buffer can be set to be either a transmit message buffer or a
receive message buffer.
• Unique ID can be set to each message buffer.
• Mask setting of four patterns is possible for each channel.
• A receive completion interrupt is generated each time a message is received
and stored in a message buffer.
• Two or more receive message buffers can be used as a FIFO receive buffer
(multi-buffer receive block function).
• Receive history list function
• Unique ID can be set to each message buffer.
• Transmit completion interrupt for each message buffer
• Message buffer number 0 to 7 specified as the transmit message buffer can be
set for automatic block transfer. Message transmission interval is programmable
(automatic block transmission function (hereafter referred to as "ABT")).
• Transmission history list function
Remote frame processing by transmit message buffer
• The time stamp function can be set for a message reception when a 16-bit timer
is used in combination.
• Time stamp capture trigger can be selected (SOF or EOF in a CAN message
frame can be detected.).
• The time stamp function can be set for a transmit message.
• Readable error counters
• "Valid protocol operation flag" for verification of bus connections
• Receive-only mode
• Single-shot mode
• CAN protocol error type decoding
• Self-test mode
• No automatic release from bus-off (software must re-enable).
• CAN Sleep mode (can be woken up by CAN bus)
• CAN Stop mode (cannot be woken up by CAN bus)
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