Datasheet

 2017 Microchip Technology Inc. DS60001516A-page 433
SAM9G20
30.7.2 TWI Master Mode Register
Name: TWI_MMR
Access: Read/Write
IADRSZ: Internal Device Address Size
MREAD: Master Read Direction
0: Master write direction.
1: Master read direction.
DADR: Device Address
The device address is used to access slave devices in read or write mode. Those bits are only used in Master mode.
31 30 29 28 27 26 25 24
––––––––
23 22 21 20 19 18 17 16
–DADR
15 14 13 12 11 10 9 8
–––MREAD–– IADRSZ
76543210
––––––––
IADRSZ[9:8]
0 0 No internal device address
0 1 One-byte internal device address
1 0 Two-byte internal device address
1 1 Three-byte internal device address