HD64F36034 datasheet(355/592 Pages) RENESAS

355 / 592 page

Section 15 Controller Area Network for Tiny (TinyCAN)

Rev. 4.00 Mar. 15, 2006 Page 323 of 556

REJ09B0026-0400

Name

Bit

Bit Name

R/W

Description

4 to 2

—

Reserved

These bits are always read as 0.

LAFMHn1

(n = 0 to 3)

1, 0

LAFMHn1,

LAFMHn0

R/W

Filter mask for bits 17 and 16 of the extended

identifier.

0: Receive message is stored in RXn because the

RXn message identifier bits match the receive

message identifier bits

1: Receive message is stored in RXn regardless of

whether the RXn message identifier bits match

the receive message identifier bits

LAFMHn0

(n = 0 to 3)

7 to 0

LAFMHn15 to

LAFMHn8

R/W

Filter mask for bits 10 to 3 of the standard

identifier.

0: Receive message is stored in RXn because the

RXn message identifier bits match the receive

message identifier bits

1: Receive message is stored in RXn regardless of

whether the RXn message identifier bits match

the receive message identifier bits

15.4.3

Message Data (MDn0 to MDn7 [n = 0 to 3])

The message data is configured as eight 8-bit registers for a single Mailbox. The transmit and

receive data are stored from byte 0 in the low-to-high order. The TinyCAN has four sets of

message data. The bit order on the CAN bus is from 1 to 8 bytes. Since MDn0 to MDn7 (n = 0 to

3) are in RAM, initial values are undefined after power-on. Be sure to initialize these bits by

writing 0 or 1.

MD0[0]

MD1[0]

MD2[0]

MD3[0]

Mailbox 0

Mailbox 1

Mailbox 2

Mailbox 3

MD0[1]

MD1[1]

MD2[1]

MD3[1]

MD0[2]

MD1[2]

MD2[2]

MD3[2]

MD0[3]

MD1[3]

MD2[3]

MD3[3]

MD0[4]

MD1[4]

MD2[4]

MD3[4]

MD0[5]

MD1[5]

MD2[5]

MD3[5]

MD0[6]

MD1[6]

MD2[6]

MD3[6]

MD0[7]

MD1[7]

MD2[7]

MD3[7]

Figure 15.3 Message Data Configuration

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