EM78P451SWM datasheet(51/54 Pages) EMC

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EM78P451S

8-Bit Microcontroller with OTP ROM

Product Specification (V1.0) 06.01.2004

• 47

(This specification is subject to change without further notice)

Symbol

Parameter

Condition

Min

Typ

Max

Unit

VOH3

Output High Voltage

(P93/SDO,P94/SCK)

IOH = -12.0mA

2.4

VOL1

Output Low Voltage

(Ports 5,6,8, P74~P77,

P90~P92,P95~P97))

IOL =12.0mA

0.4

S7=1(IOCD Register bit7),

IOH = 9.0mA

0.4

0.8

VOL2

Output Low Voltage

(P70~P72)

S7=0(IOCD Register bit7),

IOH = 12.0mA

0.4

VOL3

Output Low Voltage

(P93/SDO, P94/SCK)

IOL = 12.0mA

0.4

VOL4

Output Low Voltage

(P74~P77)

IOL = 15.0mA

0.4

IPH

Pull-high current

Pull-high active, input pin at VSS

-50

-100

-240

µA

IPH2

Pull-high current

(P74,P75)

Pull-high active, input pin at VSS

IPH3

Pull high current

(P70/RESET)

Pull-high active, input pin at VSS

-16

-22

-29

µA

ISB

Power down current

All input and I/O pin at VDD,

output pin floating, WDT enabled

µA

ICC

Operating supply current

/RESET="High",

Fosc=1.84324MHz (CK2="0"),

output pin floating

6.2 AC Characteristic

(Ta=0

°C~70°C, VDD=5V±5%, VSS=0V)

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

Dclk

Input CLK duty cycle

Tins

Instruction cycle time

(CK2="0")

RC Type

500

Ttcc

TCC input period

(Tins+20)/N*

Twdt

Watchdog timer period

Ta=25

°C

Tdrh

Device reset hold period

Ta=25

°C

183

N= selected prescaler ratio.

3 NOTE: Vdd = 5V, set up time period = 16.2ms ± 30%

Vdd = 3V, set up time period = 18.0ms ± 30%

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