CAN 2.0B Controller Module
MPC561/MPC563 Reference Manual, Rev. 1.2
16-28
Freescale Semiconductor
16.7.5
Control Register 1 (CANCTRL1)
Table 16-13. CANCTRL0 Bit Descriptions
Bits
Name
Description
0
BOFFMSK
Bus off interrupt mask. The BOFF MASK bit provides a mask for the bus off interrupt.
0 Bus off interrupt disabled
1 Bus off interrupt enabled
1
ERRMSK
Error interrupt mask. The ERRMSK bit provides a mask for the error interrupt.
0 Error interrupt disabled
1 Error interrupt enabled
2:3
—
Reserved
4:5
RXMODE
Receive signal configuration control. These bits control the configuration of the CNRX0
signals. Refer to
.
6:7
TXMODE
Transmit signal configuration control. This bit field controls the configuration of the CNTX0
signals. Refer to
.
8:15
CANCTRL1
See
Section 16.7.5, “Control Register 1 (CANCTRL1)
.”
Table 16-14. Rx MODE[1:0] Configuration
Signal
RX1
RX0
Receive Signal Configuration
CNRX0
X
0
0 CNRX0 signal is interpreted as a dominant bit
1 CNRX0 signal is interpreted as a recessive bit
X
1
0 CNRX0 signal is interpreted as a recessive bit
1 CNRX0 signal is interpreted as a dominant bit
Table 16-15. Transmit Signal Configuration
TXMODE[1:0]
TransmitSignal Configuration
00
Full CMOS
1
; positive polarity (CNTX0 = 0 is a dominant level)
1
Full CMOS drive indicates that both dominant and recessive levels are driven by the chip.
01
Full CMOS
1
; negative polarity (CNTX0 = 1 is a dominant level)
1X
Open drain
2
; positive polarity
2
Open drain drive indicates that only a dominant level is driven by the chip. During a recessive
level, the CNTX0 signal is disabled (three stated), and the electrical level is achieved by external
pull-up/pull-down devices. The assertion of both Tx mode bits causes the polarity inversion to be
cancelled (open drain mode forces the polarity to be positive).
MSB
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
LSB
15
Field
CANCTRL0
SAMP
—
TSYNC LBUF
—
PROPSEG
SRESET
0000_0000_0000_0000
Addr
0x30 7086 (CANCTRL1_A); 0x30 7486 (CANCTRL1_B); 0x30 7886 (CANCTRL1_C)
Figure 16-12. Control Register 1 (CANCTRL1)
Summary of Contents for MPC561
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Page 144: ...Signal Descriptions MPC561 MPC563 Reference Manual Rev 1 2 2 46 Freescale Semiconductor...
Page 206: ...Central Processing Unit MPC561 MPC563 Reference Manual Rev 1 2 3 62 Freescale Semiconductor...
Page 302: ...Reset MPC561 MPC563 Reference Manual Rev 1 2 7 14 Freescale Semiconductor...
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Page 1144: ...Internal Memory Map MPC561 MPC563 Reference Manual Rev 1 2 B 34 Freescale Semiconductor...
Page 1212: ...TPU3 ROM Functions MPC561 MPC563 Reference Manual Rev 1 2 D 60 Freescale Semiconductor...
Page 1216: ...Memory Access Timing MPC561 MPC563 Reference Manual Rev 1 2 E 4 Freescale Semiconductor...