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External Clock Drive
Waveforms
AT90S2313
74
Notes:
1. "Max" means the highest value where the pin is guaranteed to be read as low.
2. "Min" means the lowest value where the pin is guaranteed to be read as high.
3. Although each I/O port can sink more than the test conditions (20 mA at V
10 mA at V
= 3V) under steady state conditions (non-transient), the following must
CC
be observed:
1] The sum of all I
2] The sum of all II
3] The sum of all I
If I
exceeds the test condition, V
OL
not guaranteed to sink current greater than the listed test condition.
4. Although each I/O port can source more than the test conditions (3 mA at V
1.5 mA at V
= 3V) under steady state conditions (non-transient), the following must
CC
be observed:
1] The sum of all I
2] The sum of all I
3] The sum of all I
If I
exceeds the test condition, V
OH
not guaranteed to source current greater than the listed test condition.
5. Minimum V
for power-down is 2V.
CC
Figure 56. External Clock
VIH1
VIL1
External Clock Drive
Symbol
Parameter
1/t
Oscillator Frequency
CLCL
t
Clock Period
CLCL
t
High Time
CHCX
t
Low Time
CLCX
t
Rise Time
CLCH
t
Fall Time
CHCL
, for all ports, should not exceed 200 mA
OL
, for port D0 - D5 and XTAL2 should not exceed 100 mA.
OL
, for ports B0 - B7 and D6 should not exceed 100 mA.
OL
may exceed the related specification. Pins are
OL
, for all ports, should not exceed 200 mA
OH
, for port D0 - D5 and XTAL2 should not exceed 100 mA.
OH
, for ports B0 - B7 and D6 should not exceed 100 mA.
OH
may exceed the related specification. Pins are
OH
V
= 2.7V to 6.0V
CC
Min
Max
0
4
250.0
100.0
100.0
1.6
1.6
= 5V,
CC
= 5V,
CC
V
= 4.0V to 6.0V
CC
Min
Max
Units
0
10.0
MHz
100.0
ns
40.0
ns
40.0
ns
0.5
µs
0.5
µs
0839G–08/01
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