Техническая Спецификация для Atmel Xplained Pro Evaluation Kit ATSAMD20-XPRO ATSAMD20-XPRO
Модели
ATSAMD20-XPRO
417
Atmel | SMART SAM D20 [DATASHEET]
Atmel-42129K–SAM-D20_datasheet–06/2014
26.8.1.7 Address
Name:
ADDR
Offset:
0x14
Reset:
0x00000000
Property:
Write-Protected, Enable-Protected
z
Bits 31:24 – Reserved
These bits are unused and reserved for future use. For compatibility with future devices, always write these bits to
zero when this register is written. These bits will always return zero when read.
These bits are unused and reserved for future use. For compatibility with future devices, always write these bits to
zero when this register is written. These bits will always return zero when read.
z
Bits 23:17 – ADDRMASK[6:0]: Address Mask
The ADDRMASK bits acts as a second address match register, an address mask register or the lower limit of an
address range, depending on the CTRLB.AMODE setting.
The ADDRMASK bits acts as a second address match register, an address mask register or the lower limit of an
address range, depending on the CTRLB.AMODE setting.
z
Bits 16:8 – Reserved
These bits are unused and reserved for future use. For compatibility with future devices, always write these bits to
zero when this register is written. These bits will always return zero when read.
These bits are unused and reserved for future use. For compatibility with future devices, always write these bits to
zero when this register is written. These bits will always return zero when read.
z
Bits 7:1 – ADDR[6:0]: Address
The slave address (ADDR) bits contain the I
The slave address (ADDR) bits contain the I
2
C slave address used by the slave address match logic to determine
if a master has addressed the slave. When using 7-bit addressing, the address register (ADDR.ADDR) represents
the slave address.
the slave address.
If using 10-bit addressing, the address match logic only supports hardware address recognition of the first 2 bits of
a 10-bit address. If writing ADDR.ADDR = "0b1111 0xx," 'xx' represents bits 9 and 8 or the slave address. The next
byte received is bits 7 to 0 in the 10-bit address, and this must be handled by software.
a 10-bit address. If writing ADDR.ADDR = "0b1111 0xx," 'xx' represents bits 9 and 8 or the slave address. The next
byte received is bits 7 to 0 in the 10-bit address, and this must be handled by software.
Bit
31
30
29
28
27
26
25
24
Access
R
R
R
R
R
R
R
R
Reset
0
0
0
0
0
0
0
0
Bit
23
22
21
20
19
18
17
16
ADDRMASK[6:0]
Access
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R
Reset
0
0
0
0
0
0
0
0
Bit
15
14
13
12
11
10
9
8
Access
R
R
R
R
R
R
R
R
Reset
0
0
0
0
0
0
0
0
Bit
7
6
5
4
3
2
1
0
ADDR[6:0]
GENCEN
Access
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Reset
0
0
0
0
0
0
0
0