Address
| Bit | 31 | 30 | 29 | 28 | 27 | 26 | 25 | 24 | |
| ADDRMASK[9:7] | |||||||||
| Access | R/W | R/W | R/W | ||||||
| Reset | 0 | 0 | 0 | ||||||
| Bit | 23 | 22 | 21 | 20 | 19 | 18 | 17 | 16 | |
| ADDRMASK[6:0] | |||||||||
| Access | R/W | R/W | R/W | R/W | R/W | R/W | R/W | ||
| Reset | 0 | 0 | 0 | 0 | 0 | 0 | 0 | ||
| Bit | 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | |
| TENBITEN | ADDR[9:7] | ||||||||
| Access | R/W | R/W | R/W | R/W | |||||
| Reset | 0 | 0 | 0 | 0 | |||||
| Bit | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 | |
| ADDR[6:0] | GENCEN | ||||||||
| Access | R/W | R/W | R/W | R/W | R/W | R/W | R/W | R/W | |
| Reset | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | |
Address Mask
These bits act as a second address match register, an address mask register or the lower limit of an address range, depending on the CTRLB.AMODE setting.
Ten Bit Addressing Enable
| Value | Description |
|---|---|
| 0 | 10-bit address recognition disabled. |
| 1 | 10-bit address recognition enabled. |
Address
These bits contain the I2C client address used by the client address match logic to determine if a host has addressed the client.
When using 7-bit addressing, the client address is represented by ADDR[6:0].
When using 10-bit addressing (ADDR.TENBITEN=1), the client address is represented by ADDR[9:0]
When the address match logic detects a match, INTFLAG.AMATCH is set and STATUS.DIR is updated to indicate whether it is a read or a write transaction.
General Call Address Enable
A general call address is an address consisting of all-zeroes, including the direction bit (host write).
| Value | Description |
|---|---|
| 0 | General call address recognition disabled. |
| 1 | General call address recognition enabled. |