Control Status Register (High) (Csr: H) - Fujitsu MB90895 Series Hardware Manual

CHAPTER 16 CAN controller
16.3.1

Control Status Register (High) (CSR: H)

The control status register (CSR) controls operation of the CAN controller.The control
status register (High) (CSR: H) transmits and receives the message and indicates the
node status.
I Control Status Register (High) (CSR: H)
15 14 13
R R
: Read/Write
R/W
: Read only
R
X : Undefined
: Unused
: Reset value
Note: It is prohibited to execute a bit operation (read-modify-write) instruction on the lower 8 bits
of control status register (CSR).
Only in the case of HALT bits unchanged, use any bits operation instructions without
problems (initialization of the macro instructions e.t.c).
486
Figure 16.3-4 Control Status Register (High) (CSR: H)
12 11 10 9 8
R/W R R
bit9
NS1
0
0
1
1
bit10
NT
0
1
bit14
RS
0
1
bit15
TS
0
1
Reset value
0 0 X X X 0 0 0
B
bit8
Node status bit
NS0
0
Error active
1 Warning (error active)
0 Error passive
Bus off
1
Node status transfer flag
Without transfer of node status
With transfer of node status
Reception status bit
Not receiving message
In receiving message
Transmission status bit
Not transmitting message
In transmitting message