C167CS datasheet(276/517 Pages) INFINEON

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C167CS

Derivatives

The Asynchronous/Synchronous Serial Interface

User’s Manual

11-10

V2.0, 2000-07

11.3

Hardware Error Detection Capabilities

To improve the safety of serial data exchange, the serial channel ASC0 provides an error

interrupt request flag, which indicates the presence of an error, and three (selectable)

error status flags in register S0CON, which indicate which error has been detected

during reception. Upon completion of a reception, the error interrupt request flag S0EIR

will be set simultaneously with the receive interrupt request flag S0RIR, if one or more

of the following conditions are met:

• If the framing error detection enable bit S0FEN is set and any of the expected stop

bits is not high, the framing error flag S0FE is set, indicating that the error interrupt

request is due to a framing error (Asynchronous mode only).

• If the parity error detection enable bit S0PEN is set in the modes where a parity bit is

received, and the parity check on the received data bits proves false, the parity error

flag S0PE is set, indicating that the error interrupt request is due to a parity error

(Asynchronous mode only).

• If the overrun error detection enable bit S0OEN is set and the last character received

was not read out of the receive buffer by software or PEC transfer at the time the

reception of a new frame is complete, the overrun error flag S0OE is set indicating that

the error interrupt request is due to an overrun error (Asynchronous and synchronous

mode).

C167CS Datasheet(PDF) 276 Page - Infineon Technologies AG