Table 137: Can Tx Frame Information Register (Cantfi1, 2, 3 - 0Xe00X X030, 40, 50); Table 138: Can Tx Identifier Register When Ff=0 (Cantid1, 2, 3 - 0Xe00X X034, 44, 54); Table 139: Can Tx Identifier Register When Ff=1 (Cantid1, 2, 3 - 0Xe00X X034, 44, 54) - Philips LPC2194 User Manual

Philips Semiconductors
ARM-based Microcontroller
Tx Frame Information Register (CANTFI1, 2, 3 - 0xE00x x030, 40, 50)
When the corresponding TBS bit in CANSR is 1, software can write to one of these registers to define the format of the next
transmit message for that Tx buffer. Bits not listed read as 0 and should be written as 0. See Table 124 for details on specific
CAN channel register address.
Table 138: CAN Tx Frame Information Register (CANTFI1, 2, 3 - 0xE00x x030, 40, 50)
CANTFI Name Function
If the TPM bit in the CANMOD register is 1, enabled Tx Buffers contend for the right
7:0 PRIO
to send their messages based on this field. The lowest binary value has priority.
This value is sent in the DLC field of the next transmit message. In addition, if RTR=0,
this value controls the number of Data bytes sent in the next transmit message, from
19:16 DLC
the CANTDA and CANTDB registers:
0000-0111 = 0-7 bytes
This value is sent in the RTR bit of the next transmit message. If this bit is 0, the
number of data bytes called out by the DLC field are sent from the CANTDA and
30 RTR
CANTDB registers. If it's 1, a Remote Frame is sent, containing a request for that
number of bytes.
If this bit is 0, the next transmit message will be sent with an 11-bit Identifier, while if
31 FF
it's 1, the message will be sent with a 29-bit Identifier.
Tx Identifier Register (CANTID1, 2, 3 - 0xE00x x034, 44, 54)
When the corresponding TBS bit in CANSR is 1, software can write to one of these registers to define the Identifier field of the
next transmit message. Bits not listed read as 0 and should be written as 0. The register assumes two different formats
depending on the FF bit in CANTFI. See Table 124 for details on specific CAN channel register address.
Table 139: CAN Tx Identifier Register when FF=0 (CANTID1, 2, 3 - 0xE00x x034, 44, 54)
CANTID Name Function
10:0 ID The 11-bit Identifier to be sent in the next transmit message.
Table 140: CAN Tx Identifier Register when FF=1 (CANTID1, 2, 3 - 0xE00x x034, 44, 54)
CANTID Name Function
28:0 ID The 29-bit Identifier to be sent in the next transmit message.
CAN Controllers and Acceptance Filter
1xxx = 8 bytes
201
Preliminary User Manual
LPC2119/2129/2292/2294
Reset Value RM Set
0
0
0
Reset Value RM Set
0
Reset Value RM Set
0
May 03, 2004
X
X
X
X
X