45.5. Maximum Clock Frequencies
Table 45-5. Maximum GCLK Generator Output Frequencies
Symbol
Description
F
max
[MHz]
Units
PL0
PL2
F
gclkgen
[2:0]
GCLK Generator output Frequency
24
96
MHz
F
gclkgen
[4:3]
16
66
MHz
Table 45-6. Maximum Peripheral Clock Frequencies
Symbol
Description
Max.
Units
PL0
PL2
f
CPU
CPU clock frequency
8
32
MHz
f
AHB
AHB clock frequency
8
32
MHz
f
APBA
APBA clock frequency / Bus clock domain = BACKUP
8
8
MHz
f
APBA
APBA clock frequency / Bus clock domain = Low
Power
8
32
MHz
f
APBB
APBB clock frequency
8
32
MHz
f
APBC
APBC clock frequency
8
32
MHz
f
GCLK_DFLL48M_REF
DFLL48M Reference clock frequency
NA
33
KHz
f
GCLK_DPLL
FDPLL96M Reference clock frequency
2
2
MHz
f
GCLK_DPLL_32K
FDPLL96M 32k Reference clock frequency
32
32
KHz
f
GCLK_EIC
EIC input clock frequency
12
48
MHz
f
GCLK_FREQM_MSR
FREQM Measure
12
48
MHz
f
GCLK_FREQM_REF
FREQM Reference
12
48
MHz
f
GCLK_USB
USB input clock frequency
NA
48
MHz
f
GCLK_EVSYS_CHANNEL_0
EVSYS channel 0 input clock frequency
12
48
MHz
f
GCLK_EVSYS_CHANNEL_1
EVSYS channel 1 input clock frequency
f
GCLK_EVSYS_CHANNEL_2
EVSYS channel 2 input clock frequency
f
GCLK_EVSYS_CHANNEL_3
EVSYS channel 3 input clock frequency
f
GCLK_EVSYS_CHANNEL_4
EVSYS channel 4 input clock frequency
f
GCLK_EVSYS_CHANNEL_5
EVSYS channel 5 input clock frequency
f
GCLK_EVSYS_CHANNEL_6
EVSYS channel 6 input clock frequency
f
GCLK_EVSYS_CHANNEL_7
EVSYS channel 7 input clock frequency
f
GCLK_SERCOMx_SLOW
Common SERCOM slow input clock frequency
1
5
MHz
Atmel SAM L22G / L22J / L22N [DATASHEET]
Atmel-42402E-SAM L22G / L22J / L22N_Datasheet_Complete-07/2016
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