Renesas RL78 Series User Manual

RL78/F13, F14 CHAPTER 17 LIN/UART MODULE (RLIN3)
R01UH0368EJ0210 Rev.2.10 1204
Dec 10, 2015
(2) LIN Slave Mode
(a) Header Reception
Figure 17-8 shows the operation of the LIN/UART module (LIN slave mode) in header reception. Table 17-10
provides processing in header reception.
Figure 17-8. Operation in Header Reception
Table 17-10.
Processing in Header Reception
Step Software processing LIN/UART module processing
(1)
 Sets a baud rate.
 Sets noise filter ON/OFF.
 Enables interrupt.
 Enables error detection.
 Sets frame configuration parameters.
 Changes the LIN/UART module to the LIN slave mode: LIN operation mode.
 Sets the FTS bit in the LTRCn register to 1 (header reception or wake-up
transmission/reception started).
Waits for the setting of the FTS bit in the
LTRCn register by software.
(2) Waits for an interrupt request. Waits for detection of a break field.
(3) Detects a break field (in the case of LIN
slave mode [fixed baud rate]; for break
field detection timing in the case of LIN
slave mode [auto baud rate], see (1) Auto
Baud Rate Correction Function).
(4)
 Detects a sync field (55H)
 Sets the baud rate generator (in the
case of LIN slave mode [auto baud
rate])
 Clears the no-response request bit
(LNRR bit).
(5)
 Receives an ID field.
 Checks an ID parity bit
(6) Sets a header reception complete flag.
(7)
 Checks the LSTn register and clears flags.
 Checks the LIDBn register and prepares a response.
 Completes a header reception process.
 Waits for a response request.
n = 0, 1
The LIN/UART module can receive a break field during transmission or reception of a frame. Here, a reception status
interrupt might be generated on the detection of a framing error, bit error, etc, at the position of the stop bit of the frame
preceding break field reception.
For information about error detection, refer to 17.4.6 Error Status.
Header
Break delimiter
Break
Break field Sync field
Inter-byte space (header)
Response
Data 1
ID + parity
ID field
Response space
(1) (2) (3) (4) (5) (6) (7)

Renesas RL78 Series Specifications

General

Brand	Renesas
Model	RL78 Series
Category	Computer Hardware
Language	English