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AT91M55800A Datasheet(PDF) 11 Page - ATMEL Corporation

Part # AT91M55800A
Description  AT91 ARM Thumb Microcontroller
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Manufacturer  ATMEL [ATMEL Corporation]
Direct Link  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

AT91M55800A Datasheet(HTML) 11 Page - ATMEL Corporation

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11
AT91M55800A
1727E–ATARM–01/04
Clock Waveforms
Note:
1. Applicable only when MCKO outputs Master Clock.
Figure 4. Clock Waveform
Table 10. Master Clock Waveform Parameters
Symbol
Parameter
Conditions
Min
Max
Units
1/(t
CPMCK)
Master Clock Frequency
41.8
MHz
t
CPMCK
Master Clock Period
23.9
ns
t
CHMCK
Master Clock High Half-period
0.45 x t
CPMCK
0.55 x t
CPMCK
ns
t
CLMCK
Master Clock Low Half-period
0.45 x t
CPMCK
0.55 x t
CPMCK
ns
Table 11. Clock Propagation Times
Symbol
Parameter
Conditions
Min
Max
Units
t
CDLH
(1)
MCK Rising to MCKO Rising Edge
C
MCKO = 0 pF
7.5
11.7
ns
C
MCKO derating
0.053
0.083
ns/pF
t
CDHL
(1)
MCK Falling to MCKO Falling Edge
C
MCKO = 0 pF
7.7
12.1
ns
C
MCKO derating
0.059
0.092
ns/pF
t
CHMCK
t
CPMCK
MCK
MCKO
t
CDLH
t
CDHL
t
CLMCK
0.5 V
DDIO
0.5 V
DDIO


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