Datasheet

UM10398 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2014. All rights reserved.
User manual Rev. 12.3 — 10 June 2014 303 of 547
NXP Semiconductors
UM10398
Chapter 16: LPC111x/LPC11Cxx C_CAN controller
16.6.3.5 CAN interrupt pending 1 register
This register contains the INTPND bits of message objects 16 to 1. 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.
16.6.3.6 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.
16.6.3.7 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.
Table 271. CAN interrupt pending 1 register (CANIR1, address 0x4005 0140) 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 272. CAN interrupt pending 2 register (CANIR2, addresses 0x4005 0144) 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 273. CAN message valid 1 register (CANMSGV1, addresses 0x4005 0160) 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 - -