ATMEGA64L-8MI View Datasheet(PDF) - Atmel Corporation

Part Name

Description

Manufacturer

ATMEGA64L-8MI

8-bit AVR® Microcontroller with 64K Bytes In-System Programmable Flash

Atmel Corporation 

External Clock Drive

Waveforms

Figure 155. External Clock Drive Waveforms

VIH1

VIL1

External Clock Drive

Table 132. External Clock Drive(1)

Symbol Parameter

VCC = 2.7V to 5.5V

Min

Max

1/tCLCL Oscillator Frequency

0

8

tCLCL

Clock Period

125

tCHCX

High Time

50

tCLCX

Low Time

50

tCLCH

Rise Time

1.6

tCHCL

Fall Time

1.6

Change in period from

∆tCLCL

one clock cycle to the

2

next

Note: 1. Refer to “External Clock” on page 41 for details.

VCC = 4.5V to 5.5V

Min

Max

0

16

62.5

25

25

0.5

0.5

Units

MHz

ns

ns

ns

µs

µs

2

%

Table 133. External RC Oscillator, Typical Frequencies

R [kΩ](1)

C [pF]

f

100

70

TBD

31.5

20

TBD

6.5

20

TBD

Note: 1. R should be in the range 3kΩ - 100kΩ, and C should be at least 20 pF. The C values

given in the table includes pin capacitance. This will vary with package type.

328 ATmega64(L)

2490G–AVR–03/04

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