Renesas M16C/29 Series User Manual

17. CAN Module
puorG92/C61M
page 306
854fo7002,03.raM21.1.veR
2110-1010B90JER
17.5 Acceptance Filter Support Unit (ASU)
The acceptance filter support unit has a function to judge valid/invalid of a received ID through table search.
The IDs to receive are registered in the data table; a received ID is stored in the C0AFS register, and table
search is performed with a decoded received ID. The acceptance filter support unit can be used for the IDs
of the standard frame only.
The acceptance filter support unit is valid in the following cases.
• When the ID to receive cannot be masked by the acceptance filter.
(Example) IDs to receive: 07816, 08716, 11116
• When there are too many IDs to receive; it would take too much time to filter them by software.
Figure 17.23 shows the write and read of the C0AFS register in word access.
Figure 17.23 Write/read of C0AFS Register in Word Access
bit 15
bit 0
When read
SID 10 SID 9 SID 8 SID 7 SID 6 SID 5 SID 4 SID 3
bit 15
bit 0
SID 10 SID 9 SID 8 SID 7 SID 6 SID 5 SID 4 SID 3 SID 2 SID 1 SID 0
When write
3/8 Decoder
242 16
242 16
Address
CAN0
bit 8 bit 7
bit 8 bit 7

Renesas M16C/29 Series Specifications

General

Brand	Renesas
Model	M16C/29 Series
Category	Microcontrollers
Language	English