Atmel Xplained Pro Evaluation Kit for the ATSAMD21J18A Microcontroller ATSAMD21-XPRO ATSAMD21-XPRO Data Sheet
Product codes
ATSAMD21-XPRO
124
Atmel | SMART SAM D21 [DATASHEET]
Atmel-42181C–SAM-D21_Datasheet–07/2014
15.8.7 AHB Mask
Name:
AHBMASK
Offset:
0x14
Reset:
0x0000007F
Property:
Write-Protected
z
Bits 31:7 – 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
Bit 6 – USB: USB AHB Clock Mask
0: The AHB clock for the USB is stopped.
1: The AHB clock for the USB is enabled.
0: The AHB clock for the USB is stopped.
1: The AHB clock for the USB is enabled.
z
Bit 5 – DMAC: DMAC AHB Clock Mask
0: The AHB clock for the DMAC is stopped.
1: The AHB clock for the DMAC is enabled.
0: The AHB clock for the DMAC is stopped.
1: The AHB clock for the DMAC is enabled.
z
Bit 4 – NVMCTRL: NVMCTRL AHB Clock Mask
0: The AHB clock for the NVMCTRL is stopped.
1: The AHB clock for the NVMCTRL is enabled.
0: The AHB clock for the NVMCTRL is stopped.
1: The AHB clock for the NVMCTRL is enabled.
z
Bit 3 – DSU: DSU AHB Clock Mask
0: The AHB clock for the DSU is stopped.
1: The AHB clock for the DSU is enabled.
0: The AHB clock for the DSU is stopped.
1: The AHB clock for the DSU is enabled.
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
Access
R
R
R
R
R
R
R
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
USB
DMAC
NVMCTRL
DSU
HPB2
HPB1
HPB0
Access
R
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Reset
0
1
1
1
1
1
1
1