40.5.1.4 Address Matching

The EMAC register-pair hash address and the four specific address register-pairs must be written with the required values. Each register-pair comprises a bottom register and top register, with the bottom register being written first. The address matching is disabled for a particular register-pair after the bottom-register has been written and re-enabled when the top register is written. See Address Checking Block for details of address matching. Each register-pair may be written at any time, regardless of whether the receive circuits are enabled or disabled.