ST7FLCD1 datasheet(89/95 Pages) STMICROELECTRONICS

89 / 95 page

89/95

ST7FLCD1

Electrical Characteristics

Note:1. The minimum period tILIL should not be less than the number of cycle times it takes to execute the

interrupt service routine plus 21 cycles.

2. For the case of IOL = 8 mA, 8 mA output current if corresponding overdrive bit = 1 in MISCR

3. Output high level by means of external pull-up resistor.

tILIL

Interrupt Pulse Period

See Note 1

tCPU

tOXOV

Crystal Oscillator Start-up Time

tDDR

Power-up rise time

VDD min.

1100

Standard I/O Port Pins

VOL

Output Low Level Voltage

Port A[7:6,3:0], Port B[3:0], Push Pull

IOL = 2 mA and VDD = 5 V

0.4

VOL

Output Low Level Voltage Port C[1:0]

Open Drain

IOL = 4 mA and VDD = 5 V

0.4

VOL

Output Low Level Voltage

Port A[5:4] (See Note 2)

IOL = 8 mA and VDD = 5 V

IOL = 2 mA and VDD = 5 V

0.4

VOL

Output Low Level Voltage Port D[7:0]

Open Drain

IOL = 4 mA and VDD = 5 V

0.4

VOH

Output High Level Voltage

Port A[7:6,3:0], Port B[3:0], Push Pull

IOH = 2 mA

VDD-0.8

VOH

Output High Level Voltage

Port A[5:4]

IOH = 2 mA

IOH = 8 mA

VDD-0.8

VOH

Output High Level Voltage

Port C[1:0], Port D (See Note 3)

VDD

VIH

Input High Level Voltage Port A [7:0],

Port B [3:0], Port C [1:0], Port D[7:0],

RESET

Leading Edge

0.7 * VDD

VDD

VIL

Input Low Level Voltage Port A [7:0],

Port B [3:0], Port C [1:0], Port D[7:0],

RESET

Trailing Edge

VSS

0.2 * VDD

IIL

I/O Ports Hi-Z Leakage Current

Port A[7:0], Port B[3:0], Port C[1:0], Port D[7:0], RESET

µA

COUT

CIN

Capacitance: Ports (as Input or Output), RESET

IRPU

Pull-up resistor current

VDD = 5V VIN = VSS T =

25°C

100

µA

Symbol

Parameter

Conditions

Min.

Typ.

Max.

Unit

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