Hitachi Hidic EH-150 Applications Manual page 93

Preliminary Rev.03
9.3.3 Confirm error by status register(SR)
EH-ETH has internally status register(SR) which stores communication status for each ASR connection. You
can monitor this SR and program the retry circuit when the communication error occurs. See the "chapter 8
Register" for detailed status register information.
(1) Detect of open error
When open error occurs at the ASER connection of passive station, bit 0 of Error status register(CnESR): open
error bit(OEn) is 1.
To confirm if error occurs in open procedure, read this open error bit as occasion demand.
(2) Detect of transmission error
When transmission error occurs at the ASR connection, error status register(CnESR) bit 5: transmission error bit 1.
(3) Detect of receive error
When receive error occurs at ASR connection, error status register(CnESR) bit 4: receive error bit 1.
(4) Detection of reception data nullification
When data in receiving buffer is broken at ASR connection, error status register(CnESR) discard bit(DISn) 1.
When the below error occurs at EH-ETH communication, these error can not be detected.
The cable disconnection or connector snapping during communication(connection open)
The defect of other station during communication(connection open)
The contents of this manual might be changed without notice.
Chapter 9 Maintenance, check, error
9-5