Chapter 19 Fcan Controller (V850/Sc3); Features; Overview Of Functions - NEC Renesas V850/SC1 User Manual

The V850/SC3 features an on-chip FCAN (Full Controller Area Network) controller that complies with CAN
specification Ver. 2.0 PartB active. (The V850/SC3 product line includes the µ PD703089Y and µ PD70F3089Y as
two-channel devices and the µ PD703088Y as a single-channel device.)

19.1 Features

•
CAN specification Ver.2.0 PartB active
•
Standard frame and expanded frame transmission/reception enabled
•
Remote frame automatic transmission enabled
•
Transfer rate: 1 Mbps max.
•
32 message buffers

19.2 Overview of Functions

Table 19-1 presents an overview of FCAN controller functions.
Function
Protocol
Baud rate
Data storage
Mask functions
Message configuration
No. of messages
Message storage method
Remote reception
Remote transmission
Time stamp function
Diagnostic functions
Low-power mode
Remark n = 00 to 31
CHAPTER 19 FCAN CONTROLLER (V850/SC3)
Table 19-1. Overview of Functions
CAN Protocol Ver. 2.0, PartB active (standard and extended frame transmission/reception)
Maximum 1 Mbps
• Allocated to common access-enabled RAM area
• RAM that is mapped to an unused message buffer can be used for CPU processing or other
processing
• Mask setting of four patterns is possible for each CAN module
• Global masks and local masks can be used in common
Can be declared as transmit message or receive message
32 messages
• Storage in message buffer with unique ID
• Storage in buffer specified by receive mask function
• 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.
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.
A time stamp function can be set for receive messages and transmit messages.
• Read-enabled error counter
• "Valid protocol operation flag" for verification of bus connections
• Receive-only mode (with auto baud rate detection)
• Diagnostic processing mode
• CAN sleep mode (wakeup function using CAN bus enabled)
• CAN stop mode (wakeup function using CAN bus disabled)
User's Manual U15109EJ3V0UD
Description
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