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 284 of 547
NXP Semiconductors
UM10398
Chapter 16: LPC111x/LPC11Cxx C_CAN controller
16.5 Pin description
16.6 Register description
The C_CAN registers are organized as 32-bit wide registers.
The two sets of interface registers (IF1 and IF2) control the CPU access to the Message
RAM. They buffer the data to be transferred to and from the RAM, avoiding conflicts
between CPU accesses and message reception/transmission.
Table 243. CAN pin description (LPC11C12/C14)
Pin Type Description
CAN_TXD O C_CAN transmit output
CAN_RXD I C_CAN receive input
Table 244. CAN pin description (LPC11C22/C24)
Pin Type Description
CANL I/O LOW-level CAN bus line.
CANH I/O HIGH-level CAN bus line.
STB I Silent mode control input for CAN transceiver (LOW = Normal mode,
HIGH = silent mode).
VDD_CAN - Supply voltage for I/O level of CAN transceiver.
V
CC
- Supply voltage for CAN transceiver.
GND - Ground for CAN transceiver.
Table 245. Register overview: CCAN (base address 0x4005 0000)
Name Access Address
offset
Description Reset
value
CANCNTL R/W 0x000 CAN control 0x0001
CANSTAT R/W 0x004 Status register 0x0000
CANEC RO 0x008 Error counter 0x0000
CANBT R/W 0x00C Bit timing register 0x2301
CANINT RO 0x010 Interrupt register 0x0000
CANTEST R/W 0x014 Test register -
CANBRPE R/W 0x018 Baud rate prescaler extension register 0x0000
- - 0x01C Reserved -
CANIF1_CMDREQ R/W 0x020 Message interface 1 command request 0x0001
CANIF1_CMDMSK_W R/W 0x024 Message interface 1 command mask (write
direction)
0x0000
CANIF1_CMDMSK_R R/W 0x024 Message interface 1 command mask (read
direction)
0x0000
CANIF1_MSK1 R/W 0x028 Message interface 1 mask 1 0xFFFF
CANIF1_MSK2 R/W 0x02C Message interface 1 mask 2 0xFFFF
CANIF1_ARB1 R/W 0x030 Message interface 1 arbitration 1 0x0000
CANIF1_ARB2 R/W 0x034 Message interface 1 arbitration 2 0x0000
CANIF1_MCTRL R/W 0x038 Message interface 1 message control 0x0000