Can 1 message center 11 control register (c1m11c), Can 1 message center 12 control register (c1m12c), Can 1 message center 13 control register (c1m13c) – Maxim Integrated High-Speed Microcontroller Users Guide: DS80C390 Supplement User Manual
Page 89: Can 1 m, Essage, Enter, 11 c, Ontrol, Egister, C1m11c)

High-Speed Microcontroller User’s Guide: DS80C390 Supplement
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1 = External interrupt 5 is a high priority interrupt.
PX4
Bit 2
External Interrupt 4 Priority. This bit controls the priority of external interrupt 4.
0 = External interrupt 4 is a low priority interrupt.
1 = External interrupt 4 is a high priority interrupt.
PX3
Bit 1
External Interrupt 3 Priority. This bit controls the priority of external interrupt 3.
0 = External interrupt 3 is a low priority interrupt.
1 = External interrupt 3 is a high priority interrupt.
PX2
Bit 0
External Interrupt 2 Priority. This bit controls the priority of external interrupt 2.
0 = External interrupt 2 is a low priority interrupt.
1 = External interrupt 2 is a high priority interrupt.
CAN 1 MESSAGE CENTER 11 CONTROL REGISTER (C1M11C)
7 6 5 4 3 2 1 0
SFR FBh
MSRDY
ETI
ERI
INTRQ
EXTRQ
MTRQ ROW/TIH
DTUP
RW-0 RW-0 RW-0 RW-0 RC-0 R*-0 R*-0 R*-0
R = Unrestricted Read, C = Clear Only, * = See description below, -n = Value after Reset
C1M11C
Bits 7-0
Operation of the bits in this register are identical to those found in the CAN 1
Message One Control Register (C1M1C;ABh). Please consult the description
of that register for more information.
CAN 1 MESSAGE CENTER 12 CONTROL REGISTER (C1M12C)
7 6 5 4 3 2 1 0
SFR FCh
MSRDY
ETI
ERI
INTRQ
EXTRQ
MTRQ ROW/TIH
DTUP
RW-0 RW-0 RW-0 RW-0 RC-0 R*-0 R*-0 R*-0
R = Unrestricted Read, C = Clear Only, * = See description below, -n = Value after Reset
C1M12C
Bits 7-0
Operation of the bits in this register are identical to those found in the CAN 1
Message One Control Register (C1M1C;ABh). Please consult the description
of that register for more information.
CAN 1 MESSAGE CENTER 13 CONTROL REGISTER (C1M13C)
7 6 5 4 3 2 1 0
SFR FDh
MSRDY
ETI
ERI
INTRQ
EXTRQ
MTRQ ROW/TIH
DTUP
RW-0 RW-0 RW-0 RW-0 RC-0 R*-0 R*-0 R*-0
R = Unrestricted Read, C = Clear Only, * = See description below, -n = Value after Reset
C1M13C
Bits 7-0
Operation of the bits in this register are identical to those found in the CAN 1
Message One Control Register (C1M1C;ABh). Please consult the description
of that register for more information.