OM11077 NXP Semiconductors, OM11077 Datasheet - Page 471

• 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
UM10237_4
User manual
Fig 75. Receive buffer layout for standard and extended frame format configurations
31
31
RX
RX
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RX Data 4
RX Data 8
RX Data 4
RX Data 8
6.5 Error Management Logic (EML)
6.6 Bit Timing Logic (BTL)
6.7 Bit Stream Processor (BSP)
6.8 CAN controller self-tests
Frame info
Frame info
ID.28
The EML is responsible for the error confinement. It gets error announcements from the
BSP and then informs the BSP and IML about error statistics.
The Bit Timing Logic monitors the serial CAN Bus line and handles the Bus line related bit
timing. It synchronizes to the bit stream on the CAN Bus on a "recessive" to "dominant"
Bus line transition at the beginning of a message (hard synchronization) and
re-synchronizes on further transitions during the reception of a message (soft
synchronization). The BTL also provides programmable time segments to compensate for
the propagation delay times and phase shifts (e.g. due to oscillator drifts) and to define the
sample point and the number of samples to be taken within a bit time.
The Bit Stream Processor is a sequencer, controlling the data stream between the
Transmit Buffer, Receive Buffers and the CAN Bus. It also performs the error detection,
arbitration, stuffing and error handling on the CAN Bus.
The CAN controller of the LPC2000 family supports two different options for self-tests:
•
•
24 23
24 23
Global Self-Test (setting the self reception request bit in normal Operating Mode)
Local Self-Test (setting the self reception request bit in Self Test Mode)
unused
unused
unused
RX Data 3
RX Data 7
RX Data 3
RX Data 7
RX DLC
RX DLC
Extended Frame Format (29-bit Identifier)
Standard Frame Format (11-bit Identifier)
16 15
16 15
...
Rev. 04 — 26 August 2009
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unused
RX Data 2
RX Data 6
RX Data 2
RX Data 6
10 9 8 7
10 9 8 7
ID.28 ... ID.18
ID Index
ID Index
Chapter 18: LPC24XX CAN controllers CAN1/2
RX Data 1
RX Data 5
RX Data 1
RX Data 5
ID.00
0
0
RDA
RDB
RDA
RDB
RFS
RFS
RID
RID
BPM=bypass
message
Descriptor
Data Field
Descriptor
Data Field
Field
Field
UM10237
© NXP B.V. 2009. All rights reserved.
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