Programmer’s Model

Table 25-15. Mask examples for Normal/Extended Messages (continued)

 

Base ID

I

Extended ID

 

 

D

Match

 

ID28.................ID18

ID17......................................ID0

 

E

 

 

 

 

 

 

 

 

 

 

MB14-Id

1 1 1 1 1 1 1 1 0 0 0

1

0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1

 

 

 

 

 

 

Rx_Global_Mas

1 1 1 1 1 1 1 1 1 1 0

 

1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 1

 

k

 

 

 

 

 

 

 

 

 

Rx_Msg in

1 1 1 1 1 1 1 1 0 0 1

1

0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1

3 1

Rx_Msg in

1 1 1 1 1 1 1 1 0 0 1

0

 

2 2

Rx_Msg in

1 1 1 1 1 1 1 1 0 0 1

1

0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 0

3

 

 

 

 

 

Rx_Msg in

0 1 1 1 1 1 1 1 0 0 0

0

 

4

 

 

 

 

 

Rx_Msg in

0 1 1 1 1 1 1 1 0 0 0

1

0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1

5

 

 

 

 

 

Rx_14_Mask

0 1 1 1 1 1 1 1 1 1 1

 

1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0

 

 

 

 

 

 

Rx_Msg in

1 0 1 1 1 1 1 1 0 0 0

1

0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1

6

 

 

 

 

 

Rx_Msg in

0 1 1 1 1 1 1 1 0 0 0

1

0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1

14 7

1Match for Extended Format (MB3).

2Match for Standard Format. (MB2).

3Un-Match for MB3 because of ID0.

4Un-Match for MB2 because of ID28.

5Un-Match for MB3 because of ID28, Match for MB14.

6Un-Match for MB14 because of ID27.

7Match for MB14.

25.5.7.1 Receive Mask Registers (RXGMASK, RX14MASK, RX15MASK)

The Rx global mask register (RXGMASK) is composed of 4 bytes. The mask bits are applied to all Rx-Identifiers excluding Rx-buffers 14-15, that have their specific Rx-mask registers (RX14MASK and RX15MASK).

Field

Reset

R/W

Field

Reset

R/W Address

31

21

20

19

18

17

16

MID[28:18]

 

 

 

MID[17:15]

 

 

 

 

 

 

 

 

1111_1111_1110_1111

 

 

 

 

 

 

 

 

 

 

 

 

 

R/W

 

 

 

 

 

 

 

 

 

 

 

 

 

15

 

 

 

 

1

0

MID[14:0]

1111_1111_1111_1110

R/W

IPSBAR + 0x1C_0010 (RXGMASK), 0x1C_0014 (RX14MASK), 0x1C_0018 (RX15MASK)

Figure 25-12. Rx Mask Registers (RXGMASK, RX14MASK, and RX15MASK)

MOTOROLA

Chapter 25. FlexCAN

25-27

Page 553
Image 553
Motorola MCF5281 Receive Mask Registers RXGMASK, RX14MASK, RX15MASK, Rx Mask Registers RXGMASK, RX14MASK, and RX15MASK