MC68705R3
AND
MC68705R5
11.6.3 Switching Characteristics (VCC=
+5.25
Vdc ±O.5 Vdc, VSS=O' Vdc, TA=Oo to 70°C
unless
otherwise noted)
Characteristic
Symbol
Min
Typ Max Unit
Oscillator Frequency
Normal
fos
c
0.4
- 4.2 MHz
Instruction Cycle Time (4/foscl
tcyc
0.950
-
10
P.s
INT, INT2, or Timer Pulse Width
tWL,tWH
tcyc+
250
- - ns
RESET
Pulse Width
tRWL
tcyc+
250
- -
ns
RESET
Delay Time (External Cap= 1.0
p.Fl
tRHL
-
100
- ms
INT Zero Crossing Detection Input Frequency
flNT
0.03
- 1.0 kHz
External
Clock Duty Cycle (EXT
All
-
40
50
60
%
Crystal Oscillator Start-Up Timei*
- -
-
100
ms
*
See
Figure 7-5
for
tYPical
crystal parameters.
11.6.4
AID
Converter Characteristics (VCC=
+5.25
V ±O.5 Vdc,
VSS=O
Vdc,
TA=O°
to 70°C
unless
otherwise noted)
Characteristic
Min
Typ
Max
Unit Comments
Resolution
8 8 8
Bits
Non-Linearity
I
- -
±
1/2
LSB
For
VRH=4.0
to 5.0 V and VRL
=0
V.
Quantitizing Error
-
- ±
1/2
LSB
Conversion Range
VRL
-
VRH
V
VRH
-
.'
-
VCC
V
A/
D accuracy may decrease proportionately
as
VRL
VSS
-
0.2 V
VRH
is
reduced below 4.0
V.
The sum
of
VRH and
VRL must not exceed
VCC.
Conversion Time 30 30 30
tcyc
Includes sampling time
Monotonicity
Inherent (within total error)
Zero
Input Reading 00 00
01
hexadecimal
Vin=O
Ratiometric Reading
FE
FF FF
hexadecimal
Vin=VRH
Sample Time
5 5
5
tcyc
Sample/Hold Capacitance, Input
-
-
25
pF
Analog
Input Voltage
VRL
-
VRH
V
Negative transients on any analog lines (pins
19-24)
are
not
allowed at any time during conversion.
11-9
To Next Page
Loading...
Need help?
General
