RL78/F13, F14 CHAPTER 18 CAN INTERFACE (RS-CAN LITE)
R01UH0368EJ0210 Rev.2.10 1366
Dec 10, 2015
18.3.69 CANi Transmit Buffer Register pBH (TMPTRp) (i = 0) (p = 0 to 3)
Address TMPTR0L: F0606H, TMPTR0H: F0607H TMPTR1L: F0616H, TMPTR1H: F0617H
TMPTR2L: F0626H, TMPTR2H: F0627H TMPTR3L: F0636H, TMPTR3H: F0637H
b15 b14 b13 b12 b11 b10 b9 b8 b7 b6 b5 b4 b3 b2 b1 b0
TMDLC[3:0] — — — — TMPTR[7:0]
After Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
Bit Symbol Bit Name Description R/W
15 to 12 TMDLC[3:0] Transmit Buffer DLC Data
b15 b14 b13 b12
0 0 0 0 : 0 data bytes
0 0 0 1 : 1 data byte
0 0 1 0 : 2 data bytes
0 0 1 1 : 3 data bytes
0 1 0 0 : 4 data bytes
0 1 0 1 : 5 data bytes
0 1 1 0 : 6 data bytes
0 1 1 1 : 7 data bytes
1 X X X : 8 data bytes
R/W
11 to 8 — Reserved These bits are always read as 0. The write value should
always be 0.
R
7 to 0 TMPTR[7:0] Transmit Buffer Label Data Set the label information to be stored in the transmit history
buffer.
R/W
Modify this register when the TMTRM bit in the corresponding TMSTSp register is set to 0 (no transmit request is
present). If this register is linked to any transmit/receive FIFO buffer, do not write data to this register.
This register can be read/written when the RPAGE bit in the GRWCR register is 1.
• TMDLC[3:0] Bits
These bits are used to set the data length of the message to be transmitted from the transmit buffer when the
TMRTR bit in the TMIDHp register is set to 0 (data frame). If a 9-byte (or more) data length is set, 8 bytes of
data is actually transmitted.
When the TMRTR bit is set to 1 (remote frame), set the data length of messages to be requested.
• TMPTR[7:0] Bits
When message transmission has been completed, the TMPTR[7:0] value is stored in the transmit history buffer.
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