Data Sheet

135
Atmel | SMART SAM D21 [DATASHEET]
Atmel-42181G–SAM-D21_Datasheet–09/2015
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.
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.
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.
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.
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.
Bit 3130292827262524
AccessRRRRRRRR
Reset00000000
Bit 2322212019181716
AccessRRRRRRRR
Reset00000000
Bit 151413121110 9 8
AccessRRRRRRRR
Reset00000000
Bit 76543210
USB DMAC NVMCTRL DSU HPB2 HPB1 HPB0
Access R R/W R/W R/W R/W R/W R/W R/W
Reset01111111