UPD78F1502AGK-GAK-AX Datasheet, PDF (556/1031 Pages) Renesas Technology Corp – 16-Bit Single-Chip Microcontrollers

78K0R/Lx3
CHAPTER 14 SERIAL ARRAY UNIT
14.6.3 LIN transmission
Of UART transmission, UART3 supports LIN communication.
For LIN transmission, channel 2 of unit 1 (SAU1) is used.
UART
Support of LIN communication
Target channel
Pins used
Interrupt
Error detection flag
Transfer data length
Transfer rate
Data phase
Parity bit
Stop bit
Data direction
UART0
UART1
UART2
UART3
Not supported
Not supported
Not supported
Supported
−
−
−
Channel 2 of SAU1
−
−
−
TxD3
−
−
−
INTST3
Transfer end interrupt (in single-transfer mode) or buffer empty interrupt (in continuous transfer
mode) can be selected.
None
8 bits
Max. fMCK/6 [bps] (SDRmn [15:9] = 2 or more), Min. fCLK/(2 × 2¹¹ × 128) [bps] ^Note
Forward output (default: high level)
Reverse output (default: low level)
The following selectable
• No parity bit
• Appending 0 parity
• Appending even parity
• Appending odd parity
The following selectable
• Appending 1 bit
• Appending 2 bits
MSB or LSB first
Note Use this operation within a range that satisfies the conditions above and the AC characteristics in the electrical
specifications (see CHAPTER 31 ELECTRICAL SPECIFICATIONS).
Remarks 1. fMCK: Operation clock (MCK) frequency of target channel
fCLK: System clock frequency
2. For 78K0R/LF3, UART0 is not mounted.
LIN stands for Local Interconnect Network and is a low-speed (1 to 20 kbps) serial communication protocol designed to
reduce the cost of an automobile network.
Communication of LIN is single-master communication and up to 15 slaves can be connected to one master.
The slaves are used to control switches, actuators, and sensors, which are connected to the master via LIN.
Usually, the master is connected to a network such as CAN (Controller Area Network).
A LIN bus is a single-wire bus to which nodes are connected via transceiver conforming to ISO9141.
According to the protocol of LIN, the master transmits a frame by attaching baud rate information to it. A slave receives
this frame and corrects a baud rate error from the master. If the baud rate error of a slave is within ±15%, communication
can be established.
Figure 14-82 outlines a transmission operation of LIN.
R01UH0004EJ0501 Rev.5.01
540
Jun 20, 2011