RL78/F13, F14 CHAPTER 17 LIN/UART MODULE (RLIN3)
R01UH0368EJ0210 Rev.2.10 1156
Dec 10, 2015
(18) LIN/UART Status Register (LSTn)
Address: F06D2H
7 6 5 4 3 2 1 0
HTRC D1RC — — ERR — FRC FTC
Value after reset:
0 0 0 0 0 0 0 0
Bit Symbol Bit Name Function R/W
0 FTC Successful Frame/Wake-up
Transmission Flag
0: Response or wake-up transmission has not been completed.
1: Response or wake-up transmission has been completed.
R/W
1 FRC Successful Frame/Wake-up
Reception Flag
0: Response or wake-up reception has not been completed.
1: Response or wake-up reception has been completed.
R/W
2 — Reserved This bit is always read as 0. The write value should always be 0. R/W
3 ERR Error Detection Flag 0: No error has been detected.
1: Error has been detected.
R
4, 5 — Reserved These bits are always read as 0. The write value should always
be 0.
R/W
6 D1RC Successful Data 1 Reception
Flag
0: Data 1 reception has not been completed.
1: Data 1 reception has been completed.
R/W
7 HTRC Successful Header Reception
Flag
0: Header reception has not been completed.
1: Header reception has been completed.
R/W
The LSTn register is automatically cleared to 00H upon transition to LIN reset mode.
In LIN reset mode, writing to this register is disabled. In LIN reset mode, the register retains 00H.
To clear the specific bits in the register, write 0 to the bits to be cleared and write 1 to the other bits by using an 8-bit data
transfer instruction.
FTC flag (successful frame/wake-up transmission flag)
Only 0 can be written to the FTC flag; when 1 is written, the bit retains the value that has been retained before 1 is written.
The FTC flag is set to 1 upon completion of response or wake-up transmission. Here, an interrupt is generated if the FTCIE
bit in the LIEn register is 1 (interrupt is enabled). Note that when the response or wake-up transmission is completed with
the FTC flag set to 1, an interrupt is not generated. To clear the bit to 0, write 0 to the bit.
When response data of 9 bytes or more is to be transmitted, this bit is set to 1 each time a data group (variable from 0 to 8
bytes) is transmitted. Write 0 before starting transmission of the next data group.
FRC flag (successful frame/wake-up reception flag)
Only 0 can be written to the FRC flag; when 1 is written, the bit retains the value that has been retained before 1 is written.
The FRC flag is set to 1 upon completion of response or wake-up reception. Here, an interrupt is generated if the FRCIE bit
in the LIEn register is 1 (interrupt is enabled). Note that when the response or wake-up reception is completed with the FRC
flag set to 1, an interrupt is not generated. To clear the bit to 0, write 0 to the bit.
When response data of 9 bytes or more is to be received, this bit is set to 1 each time a data group (variable from 0 to 8
bytes) is received. Write 0 before starting reception of the next data group.
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