EM78P258N
8-Bit Microprocessor with OTP ROM
8 DC Electrical Characteristics
(Ta=25 °C, VDD=5.0V±5%, VSS=0V)
Symbol
Parameter
XTAL: VDD to 5V
XTAL: VDD to 3V
ERC: VDD to 5V
IRC: VDD to 5 V
Condition
Min
DC
Typ
Max
Unit
MHz
MHz
KHz
Hz
20
8
Two cycle with two clocks
DC
Fxt
R: 5.1KΩ, C: 100 pF
8MHz,4MHz, 1MHz, 455KHz
RCM0:RCM1=1:1
F±30%
F±30%
3.84
830
F±30%
F±30%
4.16
F
IRC1 IRC:VDD to 5V
IRC2 IRC:VDD to 5V
IRC3 IRC:VDD to 5V
IRC4 IRC:VDD to 5V
MHz
MHz
MHz
KHz
4.0
8.0
1.0
455
RCM0:RCM1=1:0
7.68
8.32
RCM0:RCM1=0:1
0.96
1.06
RCM0:RCM1=0:0
436.8
473.2
Input High Threshold
Voltage (Schmitt trigger )
VIHRC
VILRC
IIL
OSCI in RC mode
OSCI in RC mode
VIN = VDD, VSS
Ports 5, 6, 7
Ports 5, 6, 7
/RESET
3.5
V
V
Input Low Threshold
Voltage (Schmitt trigger )
1.5
Input Leakage Current for
input pins
-1
0
1
µA
V
Input High Voltage
(Schmitt trigger )
VIH1
3.75
1.25
2.0
Input Low Voltage (Schmitt
trigger )
VIL1
V
Input High Threshold
Voltage (Schmitt trigger )
VIHT1
VILT1
VIHT2
VILT2
V
Input Low Threshold
Voltage (Schmitt trigger )
/RESET
1.0
V
Input High Threshold
Voltage (Schmitt trigger )
TCC,INT
3.75
1.25
V
Input Low Threshold
Voltage (Schmitt trigger )
TCC,INT
V
VIHX1 Clock Input High Voltage
VILX1 Clock Input Low Voltage
OSCI in crystal mode
OSCI in crystal mode
3.5
1.5
V
V
Output High Voltage
IOH1
VOH = VDD-0.5V
VOH = VDD-0.5V
VOL = GND+0.5V
VOL = GND+0.5V
-3.7
-10
10
mA
mA
mA
mA
(Ports 5, P60~66,P70)
Output High Voltage
IOH2
(IR OUT (Port67))
Output Low Voltage
IOL1
(Ports 5, P60~66,P70)
Output Low Voltage
IOL2
15
(IR OUT (Port67))
IPH
IPL
Pull-high current
Pull-low current
Pull-high active, input pin at VSS -50
-75
40
-240
120
µA
µA
Pull-low active, input pin at Vdd
25
All input and I/O pins at VDD, outpu
pin floating, WDT disabled
ISB1 Power down current
ISB2 Power down current
1.0
2.0
15
µA
µA
All input and I/O pins at VDD,
output pin floating, WDT enabled
/RESET= 'High', Fosc=32KHz
(Crystal type,CLKS="0"), output
pin floating, WDT disabled
Operating supply current
ICC1
15
20
35
µA
at two clocks(VDD to 3V)
Product Specification (V1.0) 06.16.2005
• 67
(This specification is subject to change without further notice)
ELAN [ ELAN MICROELECTRONICS CORP ]
