ST92124JCR1TC View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

ST92124JCR1TC

8/16-BIT SINGLE VOLTAGE FLASH MCU FAMILY WITH RAM, E³ ™ (EMULATED EEPROM), CAN 2.0B AND J1850 BLPD

STMicroelectronics

ST92124JCR1TC Datasheet PDF : 429 Pages

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CONTROLLER AREA NETWORK (bxCAN)

CONTROLLER AREA NETWORK (Cont’d)

10.10.5.5 Message Storage

The interface between the software and the hard-

ware for the CAN messages is implemented by

means of mailboxes. A mailbox contains all infor-

mation related to a message; identifier, data, con-

trol, status and time stamp information.

Transmit Mailbox

The software sets up the message to be transmit-

ted in an empty transmit mailbox. The status of the

transmission is indicated by hardware in the

MCSR register.

Transmit Mailbox Mapping

Offset to Transmit

Mailbox base ad-

dress (bytes)

MCSR

MDLC

MIDR0

MIDR1

MIDR2

MIDR3

MDAR0

MDAR1

MDAR2

MDAR3

MDAR4

MDAR5

MDAR6

MDAR7

MTSR0

MTSR1

Receive Mailbox

When a message has been received, it is available

to the software in the FIFO output mailbox. Once

the software has handled the message (e.g. read

it) the software must release the FIFO output mail-

box by means of the RFOM bit in the CRFR regis-

ter to make the next incoming message available.

The filter match index is stored in the MFMI regis-

ter. The 16-bit time stamp value is stored in the

MTSR[0:1] registers.

Receive Mailbox Mapping

Offset to Receive