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LIN Controller (LINFlex) RM0046

518/936 Doc ID 16912 Rev 5

21.8 Functional description

21.8.1 UART mode

The main features in the UART mode are

● Full duplex communication

● 8- or 9-bit data with parity

● 4-byte buffer for reception, 4-byte buffer for transmission

● 8-bit counter for timeout management

8-bit data frames: The 8th bit can be a data or a parity bit. Even/Odd Parity can be selected

by the Odd Parity bit in the UARTCR. An even parity is set if the modulo-2 sum of the 7 data

bits is 1. An odd parity is cleared in this case.

Figure 256. UART mode 8-bit data frame

9-bit frames: The 9th bit is a parity bit. Even/Odd Parity can be selected by the Odd Parity

bit in the UARTCR. An even parity is set if the modulo-2 sum of the 8 data bits is 1. An odd

parity is cleared in this case.

Figure 257. UART mode 9-bit data frame

Buffer in UART mode

The 8-byte buffer is divided into two parts: one for receiver and one for transmitter as shown

in Table 260.

Start

bit

Stop

bit

Byte Field

— Data bit

— Parity bit

D1 D2 D3 D4 D5 D6

Start

bit

Stop

bit

Byte Field

— Parity bit

D1 D2 D3 D4 D5 D6

ST SPC560P34 User Manual

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