Atmel Xplained Pro Evaluation Kit for the ATSAMD21J18A Microcontroller ATSAMD21-XPRO ATSAMD21-XPRO Data Sheet
Product codes
ATSAMD21-XPRO
538
Atmel | SMART SAM D21 [DATASHEET]
Atmel-42181C–SAM-D21_Datasheet–07/2014
z
Bits 10:1 – ADDR[9:0]: Address
The slave address (ADDR) bits contain the I
The slave address (ADDR) bits contain the I
2
C slave address used by the slave address match logic to determine
if a master has addressed the slave.
When using 7-bit addressing, the slave address is represented by ADDR.ADDR[6:0].
When using 10-bit addressing (ADDR.TENBITEN=1), the slave address is represented by ADDR.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.
When using 7-bit addressing, the slave address is represented by ADDR.ADDR[6:0].
When using 10-bit addressing (ADDR.TENBITEN=1), the slave address is represented by ADDR.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.
z
Bit 0 – GENCEN: General Call Address Enable
Writing a one to GENCEN enables general call address recognition. A general call address is an address of all
zeroes with the direction bit written to zero (master write).
0: General call address recognition disabled.
1: General call address recognition enabled.
Writing a one to GENCEN enables general call address recognition. A general call address is an address of all
zeroes with the direction bit written to zero (master write).
0: General call address recognition disabled.
1: General call address recognition enabled.