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3 serial status register (ssr), Serial status register (ssr) – FUJITSU F2MCTM-16LX User Manual

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CHAPTER 20 LIN-UART

20.4.3

Serial Status Register (SSR)

This register checks the transmission and reception status and error status, and
enables and disables the transmission and reception interrupts.

Serial Status Register (SSR)

Figure 20.4-4 Configuration of the Serial Status Register (SSR)

PE ORE FRE RDRF TDRE BDS RIE TIE

bit15 bit14 bit13 bit12 bit11 bit10 bit9 bit8

R R R R R R/W R/W R/W

00001000

B

SSR0:000023

H

SSR1:00002B

H

bit7

bit0

R/W

: Read/Write

R

: Read only

: Initial value

bit8

TIE

Transmission interrupt request enable bit

0

Disables transmission interrupt

1

Enables transmission interrupt

bit9

RIE

Reception interrupt request enable bit

0

Disables reception interrupt

1

Enables reception interrupt

bit10

BDS

Transfer direction selection bit

0

LSB first (transfer from lowest bit)

1

MSB first (transfer from highest bit)

bit11

TDRE

Transmission data empty flag bit

0

Transmission data register is full.

1

Transmission data register is empty.

bit12

RDRF

Reception data full flag bit

0

Reception data register is empty

1

Reception data register is full

bit13

FRE

Framing error flag bit

0

No framing error occurred

1

A framing error occurred

bit14

ORE

Overrun error flag bit

0

No overrun error occurred

1

An overrun error occurred

bit15

PE

Parity error flag bit

0

No parity error occurred

1

A parity error occurred

Initial value

Address