Motorola MC6805R Series Advance Information page 83

MC68705U3 AND MC68705U5
11.7.2 Electrical Characteristics (Vee= +5.25 Vdc ±O.5 Vdc, VSS=O Vdc, TA=Oo to 70
0
e
unless otherwise noted)
Characteristic
Symbol Min Typ Max Unit
Input High Voltage
RESET (4.99SVCCs5.51) 4.0
-
VCC
(VCC<4.75) VCC-0.5
-
VCC
INT (4.99SVCCs5.51)
VIH
4.0 **
VCC
V
(VCC<4.75) VCC-0.5
**
VCC
All Other
2.0
-
VCC
Input High Voltage (TIMER Pin)
Timer Mode
VIH
2.0 - VCC+l.0 V
Bootstrap Programming Mode 9.0 12.0 15.0
Input Low Voltage
RESET
VSS
-
0.8
INT
VIL
VSS
** 1.5 V
All Other
VSS
- 0.8
Internal Power Dissipation (No Port Loading, VCC= 5.25 V T A =O°C·
PINT
-
520 740 mW
for Steady-State Operation) TA= -40°C
-
580 800
Input Capacitance
XTAL
Cin
- 25 -
pF
All Other
- 10
-
INT Zero-Crossing Voltage. through a Capacitor
VINT
2.0 - 4.0
Vac p-p
RESET Hysteresis Voltage (See Figure 7-1)
Out of Reset Voltage
VIRES +
2.1 -
4.0
V
Into Reset Voltage
VIRES-
0.8 - 2.0
Programming Voltage. (Vpp Pin)
Programming EPROM
Vpp* 20.0 21.0 22.0 V
Operating Mode
4.75
VCC
5.75
Input Current
TIMER (Vin = 0.4 V)
-
-
20
INT
(Vin=O.4 V)
-
20 50
EXTAl (Vin=2.4 V to VCC Crystal Option)
lin
-
-
10 p.A
(Vin = 0.4 V Crystal Option)
-
-
-1600
RESET (Vin=0.8 V)
IRES
-4.0
-
-40
(External Capacitor Changing Current)
*Vpp is Pin 7 on the MC68705U3 and MC68705U5 and is connected to VCC in the Normal Operating Mode. In the MC6805U2. Pin 7 is
NUM and is connected to VSS in the Normal Operating Mode. The user must allow for this difference when emulating the
MC6805U2 ROM-based MCU.
* * Due to internal biasing. this input (when not used) floats to approximately 2.0 V.
11.7.3 Switching Characteristics (Vee= +5.25 Vdc, ±O.5 V, VSS=O Vdc, TA=Oo to 70
0
e
unless otherwise noted)
Characteristic Symbol
Min Typ Max Unit
Oscillator Frequency
Normal
fosc
0.4
-
4.2 MHz
Instruction Cycle Time (4/fos c )
tcyc
0.950
-
10
"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.F) tRHL
100
-
-
ms
INT Zero Crossing Detection Input Frequency
flNT
0.03
-
1.0 kHz
External Clock Duty Cycle (EXT AU
-
40 50 60 %
Crystal Oscillator Start-Up Time*
-
-
-
100
ms
* See Figure 7-5 for tYPical crystal parameters.
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