ATMEGA163 ATMEL [ATMEL Corporation], ATMEGA163 Datasheet - Page 162

• Manufacturer Part Number: ATMEGA163
• Description: 8-bit Microcontroller with 16K Bytes In-System Programmable Flash
• Manufacturer: ATMEL [ATMEL Corporation]

External Clock Drive
162
ATmega163(L)
Table 63. External Clock Drive
Table 64. External RC Oscillator, typical frequencies
Note:
Symbol
1/t
t
t
t
t
t
CLCL
CHCX
CLCX
CLCH
CHCL
CLCL
R should be in the range 3k - 100k , and C should be at least 20pF. The C values
given in the table includes pin capacitance. This will vary with package type.
R [k ]
31.5
100
Parameter
Oscillator Frequency
Clock Period
High Time
Low Time
Rise Time
Fall Time
6.5
V
CC
Min
250
100
100
C [pF]
0
70
20
20
= 2.7V to
Max
1.6
1.6
5.5
4
V
V
Min
CC
125
50
50
0
= 4.0V to
1.0 MHz
4.0 MHz
100 kHz
f
Max
0.5
0.5
5.5
8
1142E–AVR–02/03
V
Units
MHz
ns
ns
ns
s
s