ATXMEGA128B3-AU ATMEL [ATMEL Corporation], ATXMEGA128B3-AU Datasheet - Page 81

• Manufacturer Part Number: ATXMEGA128B3-AU
• Description: 8/16-bit Atmel XMEGA B3 Microcontroller
• Manufacturer: ATMEL [ATMEL Corporation]

36.14.6
Table 36-25. External Clock used as System Clock without prescaling
Note:
8074B–AVR–02/12
Symbol
1/t
Δt
t
t
t
t
t
CH
CR
CK
CL
CF
CK
CK
1. The maximum frequency vs. supply voltage is linear between 1.8V and 2.7V, and the same applies for all other parameters
External Clock Characteristics
with supply voltage conditions.
Parameter
Clock Frequency
Clock Period
Clock High Time
Clock Low Time
Rise Time (for maximum frequency)
Fall Time (for maximum frequency)
Change in period from one clock cycle to the next
Figure 36-3. External Clock Drive Waveform
(1)
V
IL1
V
IH1
t
CH
Condition
V
V
V
V
V
V
V
V
V
V
V
V
CC
CC
CC
CC
CC
CC
CC
CC
CC
CC
CC
CC
= 1.6 - 1.8V
= 2.7 - 3.6V
= 1.6 - 1.8V
= 2.7 - 3.6V
= 1.6 - 1.8V
= 2.7 - 3.6V
= 1.6 - 1.8V
= 2.7 - 3.6V
= 1.6 - 1.8V
= 2.7 - 3.6V
= 1.6 - 1.8V
= 2.7 - 3.6V
t
CL
t
CR
t
83.3
31.5
30.0
12.5
30.0
12.5
Min
CK
0
0
Typ
t
CH
XMEGA B3
Max
12
32
10
10
10
3
3
Units
MHz
ns
%
t
81
CF