Rainbow Electronics T89C51CC01 - Manual (Page 79)

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
=
13/32
RxDC
13/32
Write
13/32
1
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