ST92124JCR2TC 查看數據表（PDF） - STMicroelectronics

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ST92124JCR2TC

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

STMicroelectronics 

CONTROLLER AREA NETWORK (bxCAN)

CONTROLLER AREA NETWORK (Cont’d)

MAILBOX FILTER MATCH INDEX (MFMI)

This register is read only.

Reset Value: 0000 0000 (00h)

7

0

FMI7 FMI6 FMI5 FMI4 FMI3 FMI2 FMI1 FMI0

MIDR1

7

0

STID5 STID4 STID3 STID2 STID1 STID0 EXID17 EXID16

Bit 7:0 = FMI[7:0] Filter Match Index

This register contains the index of the filter the

message stored in the mailbox passed through.

For more details on identifier filtering please refer

to Section 10.10.5.4 - Filter Match Index para-

graph.

Note: This register is implemented only in receive

mailboxes. In transmit mailboxes, the MCSR reg-

ister is mapped at this location.

MAILBOX IDENTIFIER REGISTERS

(MIDR[3:0])

Read / Write

Reset Value: xxxx xxxx (xxh)

MIDR0

7

0

Bit 7:2 = STID[5:0] Standard Identifier

6 least significant bits of the standard part of the

identifier.

Bit 1:0 = EXID[17:16] Extended Identifier

2 most significant bits of the extended part of the

identifier.

MIDR2

7

0

EXID15 EXID14 EXID13 EXID12 EXID11 EXID10 EXID9 EXID8

Bit 7:0 = EXID[15:8] Extended Identifier

Bit 15 to 8 of the extended part of the identifier.

0

IDE RTR STID10 STID9 STID8 STID7 STID6

Bit 7 = Reserved. Forced to 0 by hardware.

Bit 6 = IDE Extended Identifier

This bit defines the identifier type of message in

the mailbox.

0: Standard identifier.

1: Extended identifier.

MIDR3

7

0

EXID7 EXID6 EXID5 EXID4 EXID3 EXID2 EXID1 EXID0

Bit 7:1 = EXID[6:0] Extended Identifier

6 least significant bits of the extended part of the

identifier.

Bit 5 = RTR Remote Transmission Request

0: Data frame

1: Remote frame

Bit 4:0 = STID[10:6] Standard Identifier

5 most significant bits of the standard part of the

identifier.

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