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UM10503
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User manual
Rev. 1.3 — 6 July 2012
1091 of 1269
NXP Semiconductors
UM10503
Chapter 42: LPC43xx C_CAN
42.6.3.6 CAN interrupt pending 2 register
This register contains the INTPND bits of message objects 32 to 17. By reading out the
INTPND bits, the CPU can check for which Message Object an interrupt is pending. The
INTPND bit of a specific Message Object can be set/reset by the CPU via the IFx
Message Interface Registers or by the Message Handler after reception or after a
successful transmission of a frame. This will also affect the value of INTPND in the
Interrupt Register.
42.6.3.7 CAN message valid 1 register
This register contains the MSGVAL bits of message objects 16 to 1. By reading out the
MSGVAL bits, the CPU can check which Message Object is valid. The MSGVAL bit of a
specific Message Object can be set/reset by the CPU via the IFx Message Interface
Registers.
42.6.3.8 CAN message valid 2 register
This register contains the MSGVAL bits of message objects 32 to 17. By reading out the
MSGVAL bits, the CPU can check which Message Object is valid. The MSGVAL bit of a
specific Message Object can be set/reset by the CPU via the IFx Message Interface
Registers.
Table 970. CAN interrupt pending 1 register (IR1, address 0x400E 2140 (C_CAN0) and
0x400A 4140 (C_CAN1)) bit description
Bit
Symbol
Description
Reset
value
Access
15:0
INTPND16_1
Interrupt pending bits of message objects 16 to 1.
0 = This message object is ignored by the message
handler.
1 = This message object is the source of an interrupt.
0x00
R
31:16 -
Reserved
-
-
Table 971. CAN interrupt pending 2 register (IR2, addresses 0x400E 2144 (C_CAN0) and
0x400A 4144 (C_CAN1)) bit description
Bit
Symbol
Description
Reset
value
Access
15:0
INTPND32_17
Interrupt pending bits of message objects 32 to 17.
0 = This message object is ignored by the message
handler.
1 = This message object is the source of an interrupt.
0x00
R
31:16 -
Reserved
-
-
Table 972. CAN message valid 1 register (MSGV1, addresses 0x400E 2160 (C_CAN0) and
0x400A 4160 (C_CAN1)) bit description
Bit
Symbol
Description
Reset
value
Access
15:0
MSGVAL16_1
Message valid bits of message objects 16 to 1.
0 = This message object is ignored by the message
handler.
1 = This message object is configured and should be
considered by the message handler.
0x00
R
31:16
-
Reserved
-
-