CEC1712 datasheet(132/338 Pages) MICROCHIP

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CEC1712

DS00003416C-page 132

 2020-2021 Microchip Technology Inc.

FRAME_ERROR

Framing Error. Bit 3 indicates that the received character did not

have a valid stop bit. Bit 3 is set to a logic “1” whenever the stop

bit following the last data bit or parity bit is detected as a zero bit

(Spacing level). This bit is reset to a logic “0” whenever the Line

Status Register is read. In the FIFO mode this error is associated

with the particular character in the FIFO it applies to. This error is

indicated when the associated character is at the top of the

FIFO. The Serial Port will try to resynchronize after a framing

error. To do this, it assumes that the framing error was due to the

next start bit, so it samples this 'start' bit twice and then takes in

the 'data'.

R0h

RESET

PARITY ERROR

Parity Error. Bit 2 indicates that the received data character does

not have the correct even or odd parity, as selected by the even

parity select bit. This bit is set to a logic “1” upon detection of a

parity error and is reset to a logic “0” whenever the Line Status

the particular character in the FIFO it applies to. This error is

indicated when the associated character is at the top of the

FIFO.

R0h

RESET

OVERRUN_ERROR

Overrun Error. Bit 1 indicates that data in the Receiver Buffer

into the register, thereby destroying the previous character. In

FIFO mode, an overrun error will occur only when the FIFO is full

and the next character has been completely received in the shift

transferred to the FIFO. This bit is set to a logic “1” immediately

upon detection of an overrun condition, and reset whenever the

Line Status Register is read.

R0h

RESET

DATA_READY

Data Ready. It is set to a logic ‘1’ whenever a complete incoming

character has been received and transferred into the Receiver

Buffer Register or the FIFO. Bit 0 is reset to a logic ‘0’ by reading

all of the data in the Receive Buffer Register or the FIFO.

R0h

RESET

Offset

05h

Bits

Description

Type

Default

Reset

Event

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