Datasheet

28.10.3 Baud Rate
Name: BAUD
Offset: 0x0C
Reset: 0x0000
Property: PAC Write-Protection, Enable-Protected
Bit 31 30 29 28 27 26 25 24
HSBAUDLOW[7:0]
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
Bit 23 22 21 20 19 18 17 16
HSBAUD[7:0]
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
Bit 15 14 13 12 11 10 9 8
BAUDLOW[7:0]
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
Bit 7 6 5 4 3 2 1 0
BAUD[7:0]
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
Bits 31:24 – HSBAUDLOW[7:0] High Speed Master Baud Rate Low
HSBAUDLOW non-zero: HSBAUDLOW indicates the SCL low time in High-speed mode according to
HSBAUDLOW = 
GCLK
 
LOW
 1
HSBAUDLOW equal to zero: 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.
Bits 23:16 – HSBAUD[7:0] High Speed Master Baud Rate
This bit field indicates the SCL high time in High-speed mode 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.
HSBAUD = 
GCLK
 
HIGH
 1
Bits 15:8 – BAUDLOW[7:0] Master Baud Rate Low
If this bit field is non-zero, the SCL low time will be described by the value written.
For more information on how to calculate the frequency, see SERCOM 25.6.2.3 Clock Generation –
Baud-Rate Generator.
SAM D21 Family
SERCOM I2C – Inter-Integrated Circuit
© 2018 Microchip Technology Inc.
Datasheet Complete
DS40001882D-page 606