Atmel Evaluation Kit AT91SAM9M10-G45-EK AT91SAM9M10-G45-EK Data Sheet
Product codes
AT91SAM9M10-G45-EK
581
SAM9M10 [DATASHEET]
6355F–ATARM–12-Mar-13
32.11.2
TWI Master Mode Register
Name:
TWI_MMR
Addresses:
0xFFF84004 (0), 0xFFF88004 (1)
Access: Read-write
Reset:
0x00000000
• 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
7
6
5
4
3
2
1
0
–
–
–
–
–
–
–
–
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