OM11077 NXP Semiconductors, OM11077 Datasheet - Page 498

• Manufacturer Part Number: OM11077
• Description: MODULE DIMM LPC2478 ARM7
• Manufacturer: NXP Semiconductors

Specifications of OM11077

• Accessory Type: Module Card
• For Use With/related Products: ARM-57TS-LPC2478
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 568-4742

NXP Semiconductors
13. Sections of the ID look-up table RAM
14. ID look-up table RAM
UM10237_4
User manual
12.2 Acceptance filter Bypass mode
12.3 Acceptance filter Operating mode
12.4 FullCAN mode
The Acceptance Filter Bypass Mode can be used for example to change the acceptance
filter configuration during a running system, e.g. change of identifiers in the ID-Look-up
Table memory. During this re-configuration, software acceptance filtering has to be used.
It is recommended to use the ID ready Interrupt (ID Index) and the Receive Interrupt (RI).
In this mode all CAN message are accepted and stored in the Receive Buffers of active
CAN Controllers.
The Acceptance Filter is in Operating Mode when neither the AccOff nor the AccBP in the
Configuration Register is set and the eFCAN = 0.
The Acceptance Filter is in Operating Mode when neither the AccOff nor the AccBP in the
Configuration Register is set and the eFCAN = 1. More details on FullCAN mode are
available in
Four 12-bit section configuration registers (SFF_sa, SFF_GRP_sa, EFF_sa,
EFF_GRP_sa) are used to define the boundaries of the different identifier sections in the
ID-Look-up Table Memory. The fifth 12-bit section configuration register, the End of Table
address register (ENDofTable) is used to define the end of all identifier sections. The End
of Table address is also used to assign the start address of the section where FullCAN
Message Objects, if enabled are stored.
Table 442. Section configuration register settings
The Whole ID Look-up Table RAM is only word accessible. A write access is only possible
during the Acceptance Filter Off or Bypass Mode. Read access is allowed in all
Acceptance Filter Modes.
ID-Look up Table Section
FullCAN (Standard Frame Format) Identifier Section SFF_sa
Explicit Standard Frame Format Identifier Section
Group of Standard Frame Format Identifier Section
Explicit Extended Frame Format Identifier Section
Group of Extended Frame Format Identifier Section
Section 18–17 “FullCAN
Rev. 04 — 26 August 2009
mode”.
Chapter 18: LPC24XX CAN controllers CAN1/2
Register
SFF_GRP_sa = SFF_sa
EFF_sa
EFF_GRP_sa = EFF_sa
ENDofTable
Value
= 0x000
> 0x000
> SFF_sa
= SFF_GRP_sa disabled
> SFF_GRP_sa enabled
> EFF_sa
= EFF_GRP_sa disabled
> EFF_GRP_sa enabled
UM10237
© NXP B.V. 2009. All rights reserved.
Section
status
disabled
enabled
disabled
enabled
disabled
enabled
498 of 792