11
AT43USB324
1941A–02/01
Note:
XTAL2 must not be used to drive other circuitry.
PA, PB, PC, PD, PE
Symbol
Parameter
Condition
Min
Max
Unit
V
OL2
Output Low Level, PA, PB, PE0,1
I
OL
= 4 mA
0.5
V
R
PU
PC Pull-up Resistor Current
V = 0
90
280
µA
V
IL3
Input Low Level, PC
0.3
V
CEXT
V
V
IH3
Input High Level, PC
0.7
V
CEXT
V
V
IL4
Input Low Level, PD[0:3]
0.3
V
CEXT
V
V
IH4
Input High Level, PD[0:3]
0.7
V
CEXT
V
V
OL4
Output Low Level, PD[0:3]
I
OL
= 4 mA
0.3
V
CEXT
V
V
OH4
Output High Level, PD[0:3]
I
OH
= 4 mA
0.7
V
CEXT
V
C
Input/Output Capacitance
1 MHz
10
pF
Oscillator Signals: XTAL1, XTAL2
Symbol
Parameter
Condition
Min
Max
Unit
V
LH
XTAL1 Switching Level
0.47
1.20
V
V
HL
XTAL2 Switching Level
0.67
1.44
V
C
X1
Input Capacitance, XTAL1
10
pF
C
X2
Output Capacitance, XTAL2
10
pF
C
12
XTAL1/2 Capacitance
5
pF
t
SU
Start-up Time
6 MHz,
Fundamental
2
ms
DL
Drive Level
50
µW
