Microcontroller
Peripheral Timing
Calculator

Philips SJA1000 and 8xC591
CAN hardware acceptance filter

MODE: Single Filter, Extended Frames (29-bit)

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Reminder:
Binary to Hex table
0000b = 0h
0001b = 1h
0010b = 2h
0011b = 3h
0100b = 4h
0101b = 5h
0110b = 6h
0111b = 7h
1000b = 8h
1001b = 9h
1010b = Ah
1011b = Bh
1100b = Ch
1101b = Dh
1110b = Eh
1111b = Fh

In this mode, one 32-bit filter bank is used to include the following CAN frame bits into the hardware filter:

29-bit ID (Standard ID)
1-bit RTR (Remote frame)

For details about activating this mode, see the data sheet, section "Acceptance Filter".

Code(match) register ACR0 to ACR3, mask register AMR0 to AMR3

Enter the desired filter bit pattern for the 29-bit ID and 1-bit RTR, then hit the "Calculate" button. The results are given in binary, grouped into 4 bits allowing for easy translation to hexadecimal.

ID.28

ID.27

ID.26

ID.25

ID.24

ID.23

ID.22

ID.21

ID.20

ID.19

ID.18

ID.17

ID.16

ID.15

ID.14

ID.13

ID.12

ID.11

ID.10

ID.09

ID.08

ID.07

ID.06

ID.05

ID.04

ID.03

ID.02

ID.01

ID.00

RTR

The entries above require the following settings for the code(match) registers and the mask registers:

Description	Byte AxR0	Byte AxR1
Code(match) register (ACR0 and ACR1)	[__] [__]	[__] [__]
Mask register (AMR0 and AMR1)	[__] [__]	[__] [__]
	Byte AxR2	Byte AxR3
Code(match) register (ACR2 and ACR3)	[__] [__]	[__] [__]
Mask register (AMR2 and AMR3)	[__] [__]	[__] [__]

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� ESAcademy, 2000
Author: Olaf Pfeiffer

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Microcontroller Peripheral Timing Calculator

Philips SJA1000 and 8xC591 CAN hardware acceptance filter

MODE: Single Filter, Extended Frames (29-bit)

Code(match) register ACR0 to ACR3, mask register AMR0 to AMR3

Microcontroller
Peripheral Timing
Calculator

Philips SJA1000 and 8xC591
CAN hardware acceptance filter