SAM7S256_14 Datasheet, PDF (311/775 Pages) ATMEL Corporation – ARM-based Flash MCU

29.7.2 TWI Master Mode Register
Register Name:
TWI_MMR
Address Type:
Read-write
31
30
29
28
27
26
–
–
–
–
–
–
23
22
21
20
19
18
–
DADR
15
14
13
12
11
10
–
–
–
MREAD
–
–
7
6
5
4
3
2
–
–
–
–
–
–
• IADRSZ: Internal Device Address Size
Table 29-5.
IADRSZ[9:8]
0
0
0
1
1
0
1
1
No internal device address (Byte command protocol)
One-byte internal device address
Two-byte internal device address
Three-byte internal device address
• 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.
25
24
–
–
17
16
9
8
IADRSZ
1
0
–
–
SAM7S Series [DATASHEET]
6175M–ATARM–26-Oct-12
311