Can Interface; Overview; Units - Renesas RZ/A Series User Manual

RZ/A1L Group, RZ/A1LU Group, RZ/A1LC Group
21.

CAN Interface

This section gives an overall description of the CAN interface (RS-CAN).
The first section describes the features specific to this LSI, including the number of units and the
register base addresses. The subsequent sections describe the RS-CAN's functions and registers.
21.1

Overview

21.1.1

Units

This microcontroller incorporates the following number of units of the CAN interface (RS-CAN).
Table 21.1
Number of units
Name
The RS-CAN has two channels.
Table 21.2
Number of channels
Name
Table 21.3
Index
n
m
j
k
q
p
y
R01UH0437EJ0600 Rev.6.00
Jan 29, 2021
Units of RS-CAN
Channels of RS-CAN
Index
Throughout this section, the unit of the RS-CAN is identified by the index
"n": for example, RSCANnGCFG is the global configuration register in
the RS-CANn unit.
Throughout this section, the individual channels in the RS-CAN units are
identified by the index "m": for example, RSCAN0CmSTS is the channel
m status register in the RS-CAN0 unit.
The individual receive rule table registers in the RS-CAN units are
identified by the index "j": for example, RSCAN0GAFLIDj is the receive
rule ID register j in the RS-CAN0 unit.
The individual transmit/receive FIFO in the RS-CAN units are identified
by the index "k" (k = 0 to channel m × 3 + 2): for example,
RSCAN0CFCCk is the transmit/receive FIFO buffer configuration and
control register k in the RS-CAN0 unit.
The individual receive buffer in the RS-CAN units are identified by the
index "q" (q = 0 to channel m × 16 + 15): for example, RSCAN0RMIDq is
the receive buffer ID register q in the RS-CAN0 unit.
The individual transmit buffers in the RS-CAN units are identified by the
index "p" (p = 0 to channel m × 16 + 15): for example, RSCAN0TMCp is
the transmit buffer control register p in the RS-CAN0 unit.
When the registers other than above are collectively explained, they are
identified by the index "y" (y = 0): for example, RSCAN0RMNDy is the
receive buffer new data register in the RS-CAN0 unit.
RS-CAN
1
RSCAN0
RS-CAN
2
CAN0, CAN1
Meaning
21. CAN Interface
Available Number of CAN
Channels and Index
2 channels
n = 0
m = 0 or 1
j = 0 to 15
k = 0 to 5
q = 0 to 31
p = 0 to 31
y = 0
21-1