Datasheet

C505/C505C/C505A/C505CA
Data Sheet 82 12.00
Figure 42
AC Testing: Input, Output Waveforms
Figure 43
AC Testing : Float Waveforms
Figure 44
Recommended Oscillator Circuits for Crystal Oscillator
0.45 V
V
DD
0.2 -0.1
+0.90.2
DD
V
Test Points
MCT00039
V
DD
-0.5 V
AC Inputs during testing are driven at V
DD
- 0.5 V for a logic ’1’ and 0.45 V for a logic ’0’.
Timing measurements are made at
V
IHmin
for a logic ’1’ and V
ILmax
for a logic ’0’.
MCT00038
V
Load
V
Load
-0.1 V
+0.1 V
Load
V
Timing Reference
Points
V
OH
-0.1 V
+0.1 V
OL
V
For timing purposes a port pin is no longer floating when a 100 mV change from load voltage
occurs and begins to float when a 100 mV change from the loaded
V
OH
/V
OL
level occurs.
I
OL
/I
OH
≥±20 mA
MCS03311
C
2 - 20
MHz
XTAL2
XTAL1
XTAL1
XTAL2
N.C.
External Oscillator
Signal
Crystal Oscillator Mode Driving from External Source
Crystal Mode: C = 20 pF 10 pF (incl. stray capacitance)
C