Data Sheet

558
Atmel | SMART SAM D21 [DATASHEET]
Atmel-42181G–SAM-D21_Datasheet–09/2015
27.8.2.3 Baud Rate
Name: BAUD
Offset: 0x0C
Reset: 0x0000
Property: Write-Protected, Enable-Protected
z Bits 31:24 – HSBAUDLOW[7:0]: High Speed Master Baud Rate Low
HSBAUDLOW not equal to 0
HSBAUDLOW indicates the SCL low time according to the following formula.
HSBAUDLOW equal to 0
The HSBAUD register is used to time T
LOW,
T
HIGH,
T
SU;STO,
T
HD;STA
and T
SU;STA.
. T
BUF
is timed by the BAUD register.
z Bits 23:16 – HSBAUD[7:0]: High Speed Master Baud Rate
The HSBAUD register indicates the SCL high time according to the following formula. When HSBAUDLOW is
zero, T
LOW,
T
HIGH,
T
SU;STO,
T
HD;STA
and T
SU;STA
are derived using this formula. T
BUF
is timed by the BAUD register.
z Bits 15:8 – BAUDLOW[7:0]: Master Baud Rate Low
If the Master Baud Rate Low bit group (BAUDLOW) has a non-zero value, the SCL low time will be described by
the value written.
Bit3130292827262524
HSBAUDLOW[7:0]
Access R/W R/W R/W R/W R/W R/W R/W R/W
Reset00000000
Bit2322212019181716
HSBAUD[7:0]
Access R/W R/W R/W R/W R/W R/W R/W R/W
Reset00000000
Bit151413121110 9 8
BAUDLOW[7:0]
Access R/W R/W R/W R/W R/W R/W R/W R/W
Reset00000000
Bit76543210
BAUD[7:0]
Access R/W R/W R/W R/W R/W R/W R/W R/W
Reset00000000
1−=
T
f
LOW
GCLK
HSBAUDLOW
1−=
T
f
HIGH
GCLK
BAUD