Atmel ARM-Based Evaluation Kit for SAM4S16C, 32-Bit ARM® Cortex® Microcontroller ATSAM4S-WPIR-RD ATSAM4S-WPIR-RD Data Sheet
Product codes
ATSAM4S-WPIR-RD
SAM4S Series [DATASHEET]
Atmel-11100G-ATARM-SAM4S-Datasheet_27-May-14
726
34.11.2 TWI Master Mode Register
Name:
TWI_MMR
Address:
0x40018004 (0), 0x4001C004 (1)
Access: Read-writ
e
Reset:
0x00000000
• IADRSZ: Internal Device Address Size
• MREAD: Master Read Direction
0: Master write direction.
1: Master read 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
–
–
–
–
–
–
–
–
Value
Name
Description
0
NONE
No internal device address
1
1_BYTE
One-byte internal device address
2
2_BYTE
Two-byte internal device address
3
3_BYTE
Three-byte internal device address