DIAGNOSTIC APPARATUS, CONTROL UNIT, INTEGRATED CIRCUIT, VEHICLE AND METHOD OF RECORDING DIAGNOSTIC DATA

摘要

A diagnostic apparatus comprises a diagnostic data buffer constituting a volatile memory, and a non-volatile memory capable of receiving data from the buffer. A data buffer controller is also provided and is operably coupled to the buffer and has an event alert input and a data channel monitoring input for receiving diagnostic data. The buffer receives, when the state of a buffer status memory indicates that the buffer is in an unprotected state, at least part of the diagnostic data received by the controller via the data channel monitoring input to the buffer and the controller sets the state of the buffer status memory to indicate the protected state in response to receipt of an event alert received via the event alert input. A controller monitors the buffer status memory and copies a portion of the buffer to the non-volatile memory in response to the buffer status memory being set to be indicative of the protected state.

主权项

1. A diagnostic apparatus for monitoring a parameter of an integrated circuit, the apparatus comprising:
a diagnostic data buffer constituting a volatile memory; a non-volatile memory capable of receiving data from the diagnostic data buffer; a data buffer controller operably coupled to the diagnostic data buffer and having an event alert input and a data channel monitoring input for receiving diagnostic data; a buffer status memory comprising a state indicative of a protected status and a state indicative of an unprotected status; and a data transfer controller; wherein the diagnostic data buffer receives, when the state of the buffer status memory is indicative of the unprotected state, at least part of the diagnostic data received by the data buffer controller via the data channel monitoring input thereof; the data buffer controller sets the state of the buffer status memory to be indicative of the protected state in response to receipt of an event alert received via the event alert input; and the data transfer controller monitors, when in use, the buffer status memory and copies a portion of the diagnostic data buffer to the non-volatile memory for subsequent analysis in response to the buffer status memory being set to be indicative of the protected state.