Datasheet

28.7 Register Summary - I2C Slave
Offset Name Bit Pos.
0x00 CTRLA
7:0 RUNSTDBY MODE[2:0] ENABLE SWRST
15:8
23:16 SEXTTOEN SDAHOLD[1:0] PINOUT
31:24 LOWTOUT SCLSM SPEED[1:0]
0x04 CTRLB
7:0
15:8 AMODE[1:0] AACKEN GCMD SMEN
23:16 FIFOCLR[1:0] ACKACT CMD[1:0]
31:24
0x08
...
0x13
Reserved
0x14 INTENCLR 7:0 ERROR RXFF TXFE DRDY AMATCH PREC
0x15 Reserved
0x16 INTENSET 7:0 ERROR RXFF TXFE DRDY AMATCH PREC
0x17 Reserved
0x18 INTFLAG 7:0 ERROR RXFF TXFE DRDY AMATCH PREC
0x19 Reserved
0x1A STATUS
7:0 CLKHOLD LOWTOUT SR DIR RXNACK COLL BUSERR
15:8 LENERR HS SEXTTOUT
0x1C SYNCBUSY
7:0 SYSOP ENABLE SWRST
15:8
23:16
31:24
0x20
...
0x23
Reserved
0x24 ADDR
7:0 ADDR[6:0] GENCEN
15:8 TENBITEN ADDR[9:7]
23:16 ADDRMASK[6:0]
31:24 ADDRMASK[9:7]
0x28 DATA
7:0 DATA[7:0]
15:8
0x2A
...
0x33
Reserved
0x34 FIFOSPACE
7:0 TXSPACE[4:0]
15:8 RXSPACE[4:0]
0x36 FIFOPTR
7:0 CPUWRPTR[3:0]
15:8 CPURDPTR[3:0]
SAM D21 Family
SERCOM I2C – Inter-Integrated Circuit
© 2018 Microchip Technology Inc.
Datasheet Complete
DS40001882D-page 575