UM10562 Datasheet, PDF (575/942 Pages) NXP Semiconductors – LPC408x/407x User manual

NXP Semiconductors
UM10562
Chapter 20: LPC408x/407x CAN controller
20.14.11 Global FullCANInterrupt Enable register
A write access to the Global FullCAN Interrupt Enable register is only possible when the
Acceptance Filter is in the off mode.
Table 468. Global FullCAN Enable register (FCANIE - address 0x4003 C020) bit description
Bit Symbol Description
0
FCANIE Global FullCAN Interrupt Enable. When 1, this interrupt is enabled.
31:1 -
Reserved. Read value is undefined, only zero should be written.
Reset Value
0
NA
20.14.12 FullCAN Interrupt and Capture registers
For detailed description on these two registers, see Section 20.16.2 “FullCAN interrupts”.
Table 469. FullCAN Interrupt and Capture register 0 (FCANIC0 - address 0x4003 C024) bit description
Bit Symbol
Description
Reset Value
31:0 INTPND
FullCan Interrupt Pending
0
0 = FullCan Interrupt Pending bit 0.
1 = FullCan Interrupt Pending bit 1.
...
31 = FullCan Interrupt Pending bit 31.
Table 470. FullCAN Interrupt and Capture register 1 (FCANIC1 - address 0x4003 C028) bit description
Bit Symbol
Description
Reset Value
31:0 IntPnd32
FullCan Interrupt Pending bit 32.
0
0 = FullCan Interrupt Pending bit 32.
1 = FullCan Interrupt Pending bit 33.
...
31 = FullCan Interrupt Pending bit 63.
20.15 Configuration and search algorithm
The CAN Identifier Look-up Table Memory can contain explicit identifiers and groups of
CAN identifiers for Standard and Extended CAN Frame Formats. They are organized as a
sorted list or table with an increasing order of the Source CAN Channel (SCC) together
with CAN Identifier in each section.
SCC value equals CAN_controller - 1, i.e., SCC = 0 matches CAN1 and SCC = 1
matches CAN2.
Every CAN identifier is linked to an ID Index number. In case of a CAN Identifier match,
the matching ID Index is stored in the Identifier Index of the Frame Status Register
(CANRFS) of the according CAN Controller.
20.15.1 Acceptance filter search algorithm
The identifier screening process of the acceptance filter starts in the following order:
1. FullCAN (Standard Frame Format) Identifier Section
2. Explicit Standard Frame Format Identifier Section
UM10562
User manual
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Rev. 1 — 13 September 2012
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