![](http://datasheet.mmic.net.cn/120000/MSM9225BGA-2K_datasheet_3560114/MSM9225BGA-2K_85.png)
MSM9225B User’s Manual
Appendixes
A – 2
Appendix B
MSM9225B Memory Map
The following is the memory map of the entire memory space of the MSM9225B.
The symbols ‘Mn’ (for example, M0MCR, M0MSG0, M0IDR2, etc., n = 0 to 15) correspond to the number of the
respective message box among the message boxes 0 to 15.
Name
Abbreviated name
Address [H]
standard
extended
standard
extended
R/W
Access
Value at reset [H]
0000
Message control register
M0MCR
R/W
8
00
0001
Identifier 0
M0IDR0
R/W
8
Undefined
0002
Identifier 1
M0IDR1
R/W
8
Undefined
0003
Message 0
Identifier 2
M0MSG0
M0IDR2
R/W
8
Undefined
0004
Message 1
Identifier 3
M0MSG1
M0IDR3
R/W
8
Undefined
0005 (
)
Message 2
Identifier 4
M0MSG2
M0IDR4
R/W
8
Undefined
0006
Message 3
Message 0
M0MSG3
M0TMSG0
R/W
8
Undefined
0007
Message 4
Message 1
M0MSG4
M0TMSG1
R/W
8
Undefined
0008
Message 5
Message 2
M0MSG5
M0TMSG2
R/W
8
Undefined
0009
Message 6
Message 3
M0MSG6
M0TMSG3
R/W
8
Undefined
000A
Message 7
Message 4
M0MSG7
M0TMSG4
R/W
8
Undefined
000B
—
Message 5
—
M0TMSG5
R/W
8
Undefined
000C
—
Message 6
—
M0TMSG6
R/W
8
Undefined
000D
—
Message 7
—
M0TMSG7
R/W
8
Undefined
000E
CAN control register
CANC
R/W
8
01
000F
CAN interrupt control register
CANI
R/W
8
00
0010
Message control register
M1MCR
R/W
8
00
0011
Identifier 0
M1IDR0
R/W
8
Undefined
0012
Identifier 1
M1IDR1
R/W
8
Undefined
0013
Message 0
Identifier 2
M1MSG0
M1IDR2
R/W
8
Undefined
0014
Message 1
Identifier 3
M1MSG1
M1IDR3
R/W
8
Undefined
0015 (
)
Message 2
Identifier 4
M1MSG2
M1IDR4
R/W
8
Undefined
0016
Message 3
Message 0
M1MSG3
M1TMSG0
R/W
8
Undefined
0017
Message 4
Message 1
M1MSG4
M1TMSG1
R/W
8
Undefined
0018
Message 5
Message 2
M1MSG5
M1TMSG2
R/W
8
Undefined
0019
Message 6
Message 3
M1MSG6
M1TMSG3
R/W
8
Undefined
001A
Message 7
Message 4
M1MSG7
M1TMSG4
R/W
8
Undefined
001B
—
Message 5
—
M1TMSG5
R/W
8
Undefined
001C
—
Message 6
—
M1TMSG6
R/W
8
Undefined
001D
—
Message 7
—
M1TMSG7
R/W
8
Undefined
001E
Message box count setting register
NMES
R/W
8
00
001F
CAN bus timing register 0
BTR0
R/W
8
00
An asterisk (
) in the address column indicates that there is a bit that is not present in that register.
A bit can be missing at address 00x5h only in the case of the extended format.
A dash “—” indicates that the memory space is not used in the case of the standard format.