SLRC400 datasheet(28/130 Pages) PHILIPS

28 / 130 page

Philips Semiconductors

Product Specification Rev. 2.0 November 2001

•CODE Reader IC

SL RC400

Preliminary

5.2.2.3

ErrorFlag Register

Error flags showing the error status of the last executed command.

Name: ErrorFlag

Address: 0x0A

Reset value: 00000000, 0x00

AccessErr

FIFOOvfl

CRCErr

FramingErr

CollErr

Access

Rights

Description of the bits

Bit

Symbol

Function

7-6

Reserved for future use.

AccessErr

This bit is set to 1, if the access rights to the E²PROM are violated.

This bit is set to 0 starting an E²PROM related command.

FIFOOvfl

This bit is set to 1, if the µ-Processor or a SL RC400’s internal state machine

(e.g. receiver) tries to write data into the FIFO buffer although the FIFO buffer is

already full.

CRCErr

This bit is set to 1, if RxCRCEn is set and the CRC fails. It is cleared to 0

automatically at receiver start phase during the state PrepareRx.

FramingErr

This bit is set to 1, if the SOF is incorrect. It is cleared automatically at receiver

start (that is during the state PrepareRx).

RFU

CollErr

This bit is set to 1, if a bit-collision is detected. It is cleared automatically at

receiver start (that is during the state PrepareRx).

SLRC400 Datasheet(PDF) 28 Page - NXP Semiconductors