It is possible for the system to lose synchronization with the I/O port on the ECC608-TNGHNT, perhaps due to a system Reset, I/O noise or other conditions. Under this circumstance, the ECC608-TNGHNT may not respond as expected, may be asleep or may be transmitting data during an interval when the system is expecting to send data. To resynchronize, the following procedure can be followed:
It may, then, be possible to send a read sequence, and if synchronization completes properly, the ECC608-TNGHNT will ACK the device address. The device may return data or may leave the bus floating (which the system will interpret as a data value of 0xFF) during the data periods.
If the device does ACK the device address, the system must reset the internal address counter to force the ECC608-TNGHNT to ignore any partial input command that may have been sent. This can be accomplished by sending a write sequence to word address 0x00 (Reset), followed by a Stop condition.