at91sam9g20-cu ATMEL Corporation, at91sam9g20-cu Datasheet - Page 445

• Manufacturer Part Number: at91sam9g20-cu
• Description: At91 Arm Thumb Microcontrollers
• Manufacturer: ATMEL Corporation

31.10.2
Name:
Access:
Reset Value: 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.
6384B–ATARM–15-Dec-08
31
23
15
–
–
–
7
–
0
0
1
1
IADRSZ[9:8]
TWI Master Mode Register
TWI_MMR
Read-write
30
22
14
–
–
6
–
0
1
0
1
No internal device address
One-byte internal device address
Two-byte internal device address
Three-byte internal device address
29
21
13
–
–
5
–
MREAD
28
20
12
–
4
–
DADR
27
19
11
–
–
3
–
AT91SAM9G20 Preliminary
26
18
10
–
–
2
–
25
17
–
9
1
–
IADRSZ
24
16
–
8
0
–
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