SH7261 datasheet(847/1348 Pages) RENESAS

847 / 1348 page

Section 19 Controller Area Network (RCAN-ET) [R5S72611] [R5S72613]

Rev. 2.00 Sep. 07, 2007 Page 815 of 1312

REJ09B0320-0200

19.3

Mailbox

19.3.1

Mailbox Structure

Mailboxes play a role as message buffers to transmit/receive CAN frames. Each Mailbox is

comprised of 3 identical storage fields that are 1): Message Control, 2): Local Acceptance Filter

Mask, 3): Message Data. The following table shows the address map for the control, LAFM, data

and addresses for each mailbox.

Table 19.2

Address Map for Each Mailbox

Address

Control0

LAFM

Data

Control1

Mailbox

4 bytes

8 bytes

2 bytes

0 (Receive Only)

H'100 to H'103

H'104 to H'107

H'108 to H'10F

H'110 to H'111

H'120 to H'123

H'124 to H'127

H'128 to H'12F

H'130 to H'131

H'140 to H'143

H'144 to H'147

H'148 to H'14F

H'150 to H'151

H'160 to H'163

H'164 to H'167

H'168 to H'16F

H'170 to H'171

H'180 to H'183

H'184 to H'187

H'188 to H'18F

H'190 to H'191

H'1A0 to H'1A3

H'1A4 to H'1A7

H'1A8 to H'1AF

H'1B0 to H'1B1

H'1C0 to H'1C3

H'1C4 to H'1C7

H'1C8 to H'1CF

H'1D0 to H'1D1

H'1E0 to H'1E3

H'1E4 to H'1E7

H'1E8 to H'1EF

H'1F0 to H'1F1

H'200 to H'203

H'204 to H'207

H'208 to H'20F

H'210 to H'211

H'220 to H'223

H'224 to H'227

H'228 to H'22F

H'230 to H'231

H'240 to H'243

H'244 to H'247

H'248 to H'24F

H'250 to H'251

H'260 to H'263

H'264 to H'267

H'268 to H'26F

H'270 to H'271

H'280 to H'283

H'284 to H'287

H'288 to H'28F

H'290 to H'291

H'2A0 to H'2A3

H'2A4 to H'2A7

H'2A8 to H'2AF

H'2B0 to H'2B1

H'2C0 to H'2C3

H'2C4 to H'2C7

H'2C8 to H'2CF

H'2D0 to H'2D1

H'2E0 to H'2E3

H'2E4 to H'2E7

H'2E8 to H'2EF

H'2F0 to H'2F1

Mailbox-0 is a receive-only box, and all the other Mailboxes can operate as both receive and

transmit boxes, dependant upon the MBC (Mailbox Configuration) bits in the Message Control.

The following diagram shows the structure of a Mailbox in detail.

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