13.22.7.3 STATUS_0 and STATUS_1

There are STATUS_0 and STATUS_1 messages that are sent by the host dsPIC DSC to the MOSFET Gate Driver to retrieve the device STAT0 and STAT1 registers. Unsolicited STATUS_0 and STATUS_1messages may also be sent to the host by the MOSFET Gate Driver to inform the host of status changes. The unsolicited STATUS_0 and STATUS_1 messages will only be sent when a status bit changes to an Active state. The STATUS_0 and STATUS_1 message format is indicated in Table 13-7. The response is indicated in Table 13-8.

When a STATUS_0 or STATUS_1 message is sent to the host dsPIC DSC in response to a new Fault becoming active, the FAULT bit will be cleared, either by the host issuing a STATUS_0 or STATUS_1 request message, or by the host toggling the OE pin low then high. The FAULT bit will stay active and not be cleared if the Fault condition still exists at the time the host attempted to clear the Fault.

The PCONx bits of the STAT0 register will be set every time the device restarts due to various events (see Table 13-4 ). When the driver resumes operation, a single unsolicited STATUS_0 message will be sent to the host dsPIC DSC indicating a Reset has occurred. The message will be sent five milliseconds (5 ms) after the V_REG LDO has reached its Active state. The host should check the PCONx bits to determine the cause of the power cycle. In all cases, the configuration data may have been and should be resent to the driver. The PCONx flags are reset by a host STATUS_0 request message. If the host misses the unsolicited STATUS_0 message at start-up, the host may manually request the status by sending a STATUS_0 message to the driver. The PCONx bits of the STAT0 register will contain the source of the Power-on Reset until the STAT0 register is requested by the host.