Specifications

176
3706C–MICRO–2/11
AT89LP3240/6440
The values shown in these tables are valid for T
A
= -40°C to 85°C and V
DD
= 2.4 to 3.6V, unless otherwise noted.
Note: 1. No wait state (single-cycle) execution speed
Figure 26-12. Typical Internal Oscillator Frequency vs. VCC
Table 26-1. External Clock Parameters
Symbol Parameter
V
DD
= 2.4V to 3.6V V
DD
= 2.7V to 3.6V
UnitsMin Max Min Max
1/t
CLCL
Oscillator Frequency
(1)
020025MHz
t
CLCL
Clock Period 50 40 ns
t
CHCX
External Clock High Time 12 12 ns
t
CLCX
External Clock Low Time 12 12 ns
t
CLCH
External Clock Rise Time 5 5 ns
t
CHCL
External Clock Fall Time 5 5 ns
Table 26-2. Clock Characteristics
Symbol Parameter Condition Min Max Units
f
XTAL
Crystal Oscillator Frequency
Low Speed Oscillator 10 100 kHz
High Speed Oscillator 0.5 24 MHz
f
RC
Internal Oscillator Frequency
T
A
= 25°C; V
DD
= 3.0V 7.92 8.08 MHz
V
DD
= 2.4 to 3.6V 7.80 8.20 MHz
2.4 2.7 3.0 3.3 3.6
7.80
7.85
7.90
7.95
8.00
8.05
8.10
-40C
0C
25C
70C
85C
Vcc (V)
Frequency (MHz)