Data Sheet

738
Atmel | SMART SAM D21 [DATASHEET]
Atmel-42181G–SAM-D21_Datasheet–09/2015
30.8.22 Period Buffer
Mode: DITH4
Name: PERB
Offset: 0x6C
Reset: 0x00FFFFFF
Property: -
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.
z Bits 23:4 – PERB[19:0]: Period Buffer Value
These bits hold the value of the period register.
The number of bits in this field corresponds to the size of the counter.
z Bits 3:0 – DITHERCYB[3:0]: Dithering Buffer Cycle Number
These bits represent the PER.DITHERCY bits buffer. When the double buffering is enable, DITHERCYB bits value
is copied to the PER.DITHERCY bits on an UPDATE condition.
Bit 3130292827262524
AccessRRRRRRRR
Reset00000000
Bit 2322212019181716
PERB[19:12]
AccessR/WR/WR/WR/WR/WR/WR/WR/W
Reset11111111
Bit 151413121110 9 8
PERB[11:4]
AccessR/WR/WR/WR/WR/WR/WR/WR/W
Reset11111111
Bit 76543210
PERB[3:0] DITHERCYB[3:0]
AccessR/WR/WR/WR/WR/WR/WR/WR/W
Reset11111111