NXP Semiconductors LPC1769 - APB Interface Block (AIB); Interface Management Logic (IML); Transmit Buffers (TXB)

UM10360 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2013. All rights reserved.
User manual Rev. 3 — 19 December 2013 346 of 841
NXP Semiconductors
UM10360
Chapter 16: LPC176x/5x CAN1/2
• Nested Vectored Interrupt Controller (NVIC)
• CAN Transceiver
• Common Status Registers
16.5.1 APB Interface Block (AIB)
The APB Interface Block provides access to all CAN Controller registers.
16.5.2 Interface Management Logic (IML)
The Interface Management Logic interprets commands from the CPU, controls internal
addressing of the CAN Registers and provides interrupts and status information to the
CPU.
16.5.3 Transmit Buffers (TXB)
The TXB represents a Triple Transmit Buffer, which is the interface between the Interface
Management Logic (IML) and the Bit Stream Processor (BSP). Each Transmit Buffer is
able to store a complete message which can be transmitted over the CAN network. This
buffer is written by the CPU and read out by the BSP.
Fig 53. CAN controller block diagram
INTERFACE
MANAGEMENT
LOGIC
TRANSMIT
BUFFERS 1,2
AND 3
RECEIVE
BUFFERS 1
AND 2
BIT
TIMING
LOGIC
BIT
STREAM
PROCESSOR
ERROR
MANAGEMENT
LOGIC
CAN CORE
BLOCK
NVIC
APB BUS
ACCEPTANCE
FILTER
COMMON
STATUS
REGISTER
CAN
TRANSCEIVER
TX
RX