m30833fjgp Renesas Electronics Corporation., m30833fjgp Datasheet - Page 347

• Manufacturer Part Number: m30833fjgp
• Description: Renesas 16/32-bit Single-chip Microcomputer M16c Family / M32c/80 Series
• Manufacturer: Renesas Electronics Corporation.

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22. CAN Module
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NOTES:
Table 22.1 CAN Module Specifications
2
0
The CAN (Controller Area Network) module incorporated in the M32C/83 group is a Full CAN module,
compatible with CAN Specification 2.0 Part B. Table 22.1 lists specifications of the CAN module.
Protocol
Message Slots
Polarity
Acceptance Filter
Baud Rate
Remote Frame Automatic
Answering Function
Time Stamp Function
BasicCAN Mode
Transmit Abort Function
Loopback Function
Forcible Error Active
Clear Function
Figure 22.1 shows a block diagram of the CAN module. Figure 22.2 shows CANi message slot buffer (the
message slot buffer) (i=0,1) and CANi message slot (the message slot) j (j=0 to 15). Table 22.2 lists pin
settings of the CAN module.
The message slot cannot be accessed directly from the CPU. Allocate the message slot j to be used to the
message slot buffer 0 or 1. The message slot j is accessed via the message slot buffer address. The
CiSBS register selects the message slot j to be allocated. Figure 22.2 shows the 16-byte message slot
buffer and message slot.
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from the CAN bus bit clock divided by 1, 2, 3 or 4.
CAN Specification 2.0 Part B
16 slots
Dominant: "L"
Recessive: "H"
Global mask: 1 mask (for message slots 0 to 13)
Local mask: 2 masks (for message slots 14 and 15 respectively)
Baud rate =
Tq clock cycle =
Tq per bit = SS + PTS +PBS1+PBS2
Message slot that receives the remote frame transmits the data frame
automatically
Time stamp function with a 16-bit counter. Count source can be selected
BasicCAN function can be used with the CANi message slots 14 and 15.
Transmit request is aborted
Frame transmitted by the CAN module is received by the same CAN module
The CAN module is forced into an error active state
3
8
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8
Tq:
BRP: Setting value in the C0BRP and C1BRP registers, 1-255
SS:
PTS: Propagation Time Segment; 1 to 8 Tq
PBS1: Phase Buffer Segment 1; 2 to 8 Tq
PBS2: Phase Buffer Segment 2 ; 2 to 8 Tq
Time quantum
Synchronization Segment; 1 Tq
Tq clock cycle x Tq per bit
BRP + 1
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1
1
Specification
--- Max. 1 Mbps
22. CAN Module