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User’s Manual U14492EJ3V0UD
CHAPTER 11 FCAN CONTROLLER
The V850E/IA1 features a 1 channel on-chip FCAN (Full Controller Area Network) controller that complies with the
CAN specification Ver. 2.0, PartB active.
11.1 Function Overview
Table 11-1 presents an overview of V850E/IA1 functions.
Table 11-1. Overview of Functions
Function
Description
Protocol
CAN Protocol Ver. 2.0, PartB active (standard and extended frame transmission/reception)
Baud rate
Maximum 1 Mbps (during 16 MHz clock input)
Data storage
•
Allocated to common access-enabled RAM area
•
RAM that is mapped to an unused message byte can be used for CPU processing or other
processing
Mask functions
•
Four
•
Global masks and local masks can be used without distinction
Message configuration
Can be declared as transmit or receive messages
No. of messages
32
Message storage
method
•
Storage to reception buffer corresponding to ID
•
Storage to buffer specified by receive mask function
Remote reception
•
Remote frames can be received in either the receive message buffer or the transmit message
buffer
•
If a remote frame is received by a transmit message buffer, there is a choice between having the
remote request processed by the CPU or starting the auto transmit function.
Remote transmission
The remote frame can be sent either by setting the transmit message’s RTR bit (M_CTRLn register)
or by setting the receive message’s send request.
Time stamp function
A time stamp function can be set for receive messages and transmit messages.
Diagnostic functions
•
Read-enabled error counter is provided.
•
“Valid protocol operation flag” is provided for verification of bus connections.
•
Receive-only mode (with auto baud rate detection) is provided.
•
Diagnostic processing mode is provided.
Low-power mode
•
CAN sleep mode (wake up function using CAN bus is enabled)
•
CAN stop mode (wake up function using CAN bus is disabled)
Remark
n = 00 to 31
Содержание V850E/IA1 mPD703116
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