Datasheet

C505/C505C/C505A/C505CA
Data Sheet 70 12.00
AC Characteristics (16 MHz, 0.4 to 0.6 Duty Cycle, cont’d)
Note: The 16 MHz values in the tables are given as an example for a typical duty cycle variation of
the oscillator clock from 0.4 to 0.6.
External Clock Drive Characteristics
Parameter Symbol CPU Clock = 16 MHz
Duty Cycle 0.4 to 0.6
Variable CPU Clock
1/CLP = 2 to 16 MHz
Unit
min. max. min. max.
Oscillator period CLP 62.5 62.5 62.5 500 ns
High time TCL
H
25 – 25 CLP - TCL
L
ns
Low time TCL
L
25 – 25 CLP - TCL
H
ns
Rise time
t
R
– 10 – 10 ns
Fall time
t
F
– 10 – 10 ns
Oscillator duty cycle DC 0.4 0.6 25 / CLP 1 - 25 / CLP –
Clock cycle TCL 25 37.5 CLP * DC
min
CLP * DC
max
ns