Rainbow-electronics T89C51CC01 Manual do Utilizador descarregar pdf (Página 79)

T89C51CC01

Rev. D – 17-Dec-01

15.7 Acceptance filter Upon a reception hit (i.e., a good comparison between the ID+RTR+RB+IDE received

and an ID+RTR+RB+IDE specified while taking the comparison mask into account) the

ID+RTR+RB+IDE received are written over the ID TAG Registers.

ID => IDT0-29

RTR => RTRTAG

RB => RB0-1TAG

IDE => IDE in CANCONCH register

Figure 37. Acceptance filter block diagram

example:

To accept only ID = 318h in part A.

ID MSK = 111 1111 1111 b

ID TAG = 011 0001 1000 b

13/32

RxDC

13/32

Write

13/32

Hit

13/32

ID MSK Registers (Ch i)

ID & RB RTR IDE

Rx Shift Register (internal)

ID & RB RTR IDE

Enable

(Ch i)

ID TAG Registers (Ch i) & CanConch

ID & RB RTR

IDE

1 2 ... 74 75 76 77 78 79 80 81 82 83 84 ... 148 149

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Rainbow-electronics T89C51CC01 Manual do Utilizador Página 79