STR720 datasheet(228/401 Pages) STMICROELECTRONICS

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UMask

Use Acceptance Mask

1: Use Mask (Msk28-0, MXtd, and MDir) for acceptance filtering.

0: Mask ignored.

Note

If the UMask bit is set to one, the Message Object’s mask bits

have to be programmed during initialization of the Message

Object before MsgVal is set to one.

ID28-0

Message Identifier

ID28 - ID0, 29-bit Identifier (“Extended Frame”)

ID28 - ID18, 11-bit Identifier (“Standard Frame”)

Msk28-0

Identifier Mask

1: The corresponding identifier bit is used for acceptance filtering.

0: The corresponding bit in the identifier of the message object cannot

inhibit the match in the acceptance filtering.

Xtd

Extended Identifier

1: The 29-bit (“extended”) Identifier will be used for this Message

Object.

0: The 11-bit (“standard”) Identifier will be used for this Message Object.

MXtd

Mask Extended Identifier

1: The extended identifier bit (IDE) is used for acceptance filtering.

0: The extended identifier bit (IDE) has no effect on the acceptance

filtering.

Note

When 11-bit (“standard”) Identifiers are used for a Message

Object, the identifiers of received Data Frames are written into

bits ID28 to ID18. For acceptance filtering, only these bits

together with mask bits Msk28 to Msk18 are considered.

STR720 数据表(PDF) 228 Page - STMicroelectronics