28.2.3.5 SSP Mask Register
The MSSP Mask (SSPxMSK) register
is available in I2C Client mode as a mask for the value
held in the SSPSR register during an address comparison operation. A zero (‘0
’) bit in the SSPxMSK register has the effect of making
the corresponding bit of the received address a “don’t care”.
This register is reset to all ‘1
’s upon any Reset condition and, therefore, has no effect on standard MSSP
operation until written with a mask value.
SSPxMSK is active during:
- 7-bit Address mode: Address compare of A[7:1]
- 10-bit Address mode: Address compare of A[7:0] only. The MSSP mask has no effect during the reception of the first (high) byte of the address.