h8s-2649 Renesas Electronics Corporation., h8s-2649 Datasheet - Page 461

• Manufacturer Part Number: h8s-2649
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2600 Series
• Manufacturer: Renesas Electronics Corporation.

• Message Buffer Interface (MBI)
• Microprocessor Interface (MPI)
• CAN Data Link Controller (CDLC)
14.2
Table 14.1 shows the HCAN pins.
When using HCAN pins, settings must be made in the HCAN configuration mode (during
initialization: MCR0 = 1 and GSR3 = 1).
Table 14.1 HCAN Pins
A bus driver is necessary for the interface between the pins and the CAN bus. A Philips
PCA82C250 compatible model is recommended.
Channel
0
1
The MBI, consisting of mailboxes and a local acceptance filter mask (LAFM), stores CAN
transmit/receive messages (identifiers, data, etc.) Transmit messages are written by the CPU.
For receive messages, the data received by the CDLC is stored automatically.
The MPI, consisting of a bus interface, control register, status register, etc., controls HCAN
internal data, status, and so forth.
The CDLC, conforming to the Bosch CAN Ver. 2.0B active standard, performs transmission
and reception of messages (data frames, remote frames, error frames, overload frames, inter-
frame spacing), as well as CRC checking, bus arbitration, and other functions.
Input/Output Pins
Name
HCAN transmit data
pin 0
HCAN receive data
pin 0
HCAN transmit data
pin 1
HCAN receive data
pin 1
Abbreviation
HTxD0
HRxD0
HTxD1
HRxD1
Input/Output
Output
Input
Output
Input
Section 14 Controller Area Network (HCAN)
Rev. 2.00 Dec. 05, 2005 Page 423 of 724
Function
CAN bus transmission pin
for channel 0
CAN bus reception pin for
channel 0
CAN bus transmission pin
for channel 1
CAN bus reception pin for
channel 1
REJ09B0200-0200