UPD78F0838 Renesas Electronics Corporation., UPD78F0838 Datasheet - Page 374

• Manufacturer Part Number: UPD78F0838
• Description: 8-bit Single-chip Microcontrollers
• Manufacturer: Renesas Electronics Corporation.

372
INTST6n
Cautions 5. Set transmit data to TXB6n at least one base clock (f
Remarks 1. LIN stands for Local Interconnect Network and is a low-speed (1 to 20 kbps) serial communication
Notes 1. The wakeup signal frame is substituted by 80H transmission in the 8-bit mode.
Remark The interval between each field is controlled by software.
LIN bus
(output)
TXD6n
Figures 12-1 and 12-2 outline the transmission and reception operations of LIN.
Note 3
2. The sync break field is output by hardware. The output width is the bit length set by bits 4 to 2 (SBL62n
3. INTST6n is output on completion of each transmission. It is also output when SBF is transmitted.
n = 0, 1
6. If data is continuously transmitted, the communication timing from the stop bit to the next
2. n = 0, 1
to SBL60n) of asynchronous serial interface control register 6n (ASICL6n). If more precise output width
adjustment is necessary, use baud rate generator control register 6n (BRGC6n)
(see 12.4.2 (2) (h) SBF transmission).
start bit is extended two operating clocks of the macro. However, this does not affect the
result of communication because the reception side initializes the timing when it has
detected a start bit. Do not use the continuous transmission function if the interface is used
in LIN communication operation.
protocol intended to aid the cost reduction of an automotive network.
LIN communication is single-master communication, and up to 15 slaves can be connected to one
master.
The LIN slaves are used to control the switches, actuators, and sensors, and these are connected
to the LIN master via the LIN network.
Normally, the LIN master is connected to a network such as CAN (Controller Area Network).
In addition, the LIN bus uses a single-wire method and is connected to the nodes via a transceiver
that complies with ISO9141.
n the LIN protocol, the master transmits a frame with baud rate information and the slave receives it
and corrects the baud rate error. Therefore, communication is possible when the baud rate error in
the slave is 15% or less.
signal frame
8 bits
Wakeup
Note 1
CHAPTER 12 SERIAL INTERFACES UART60 AND UART61
Figure 12-1. LIN Transmission Operation
13-bit
transmission
break field
Preliminary User’s Manual U19748EJ1V0UD
Sync
Note 2
SBF
transmission
Sync
field
55H
transmission
Identifier
Data
field
XCLK6
) after setting TXE6n = 1.
transmission
Data field
Data
transmission
Data field Checksum
Data
transmission
Data
field