HD64F2638F20J Datasheet, PDF (664/1512 Pages) Renesas Technology Corp – Renesas 16-Bit Single-Chip Microcomputer H8S Family/H8S/2600 Series

Section 16 Controller Area Network (HCAN)
H8S/2639, H8S/2638, H8S/2636,
H8S/2630, H8S/2635 Group
Message Buffer Interface (MBI): 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.
Microprocessor Interface (MPI): The MPI, consisting of a bus interface, control register, status
register, etc., controls HCAN internal data, statuses, and so forth.
CAN Data Link Controller (CDLC): The CDLC performs transmission and reception of
messages conforming to the Bosch CAN Ver. 2.0B active standard (data frames, remote frames,
error frames, overload frames, inter-frame spacing), as well as CRC checking, bus arbitration, and
other functions.
16.1.3 Pin Configuration
Table 16-1 shows the HCAN’s pins.
When using HCAN pins, settings must be made in the HCAN configuration mode (during
initialization: MCR0 = 1 and GSR3 = 1).
Table 16-1 HCAN Pins
Channel Name
0
HCAN transmit data pin 0
Abbreviation Input/Output
HTxD0
Output
HCAN receive data pin 0 HRxD0
Input
1^*
HCAN transmit data pin 1 HTxD1
Output
HCAN receive data pin 1 HRxD1
Input
Note: * The HCAN1 is not supported by the H8S/2635 Group.
Function
Channel 0 CAN bus
transmission pin
Channel 0 CAN bus
reception pin
Channel 1 CAN bus
transmission pin
Channel 1 CAN bus
reception pin
A bus driver is necessary between the pins and the CAN bus. A HA13721 compatible model is
recommended.
Page 614 of 1458
REJ09B0103-0800 Rev. 8.00
May 28, 2010