HTG1390 Просмотр технического описания (PDF) - Holtek Semiconductor

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HTG1390

4-bit Microcontroller

Holtek Semiconductor 

Preliminary

HTG1390

D.C. Characteristics

Ta=25°C

Symbol

Parameter

VDD

IDD

Operating Voltage

Operating Current

ISTB

Standby Current

Test Conditions

VDD

Conditions

—

—

1.5V

No load,

fSYS=256kHz

1.5V

No load,

HALT mode

Min. Typ. Max. Unit

1.2 1.5 1.8 V

— 20 — µA

——

1

µA

VIL

VIH

IOL1

IOH1

IOL2

Input Low Voltage

1.5V

—

0 — 0.4 V

Input High Voltage

1.5V

—

1.0 — 1.5 V

Port A, BZ & BZ Output Sink

Current

1.5V

VDD=1.5V,

VOL=0.15V

95 100 — µA

Port A, BZ & BZ Output

Source Current

1.5V

VDD=1.5V,

VOH=1.35V

600 700 — µA

Segment Output Sink

Current

1.5V VLCD=3V, VOL=0.3V 100 150 — µA

IOH2

RPH

Segment Output Source

Current

Pull–high Resistance

1.5V VLCD=3V, VOH=2.7V –20 –40 — µA

1.5V PS, PP, RES

30 — 300 kΩ

A.C. Characteristics

Ta=25°C

Symbol

Parameter

fSYS

fLCD

tCOM

tCY

tRES

System Clock

LCD Clock

LCD Common Period

Cycle Time

Reset Pulse Width

fSOUND Sound Effect Clock

Test Conditions

VDD Conditions

1.5V R:36kΩ~2MΩ

1.5V

—

— 1/3 duty

— fSYS=256kHz

—

—

—

—

Min.

Typ.

Max. Unit

38

—

400 kHz

—

128*

— Hz

— (1/fLCD)×3 —

s

—

16

— µs

5

—

— ms

—

64 or 128

**

— kHz

Notes: * In general, fLCD is selected and optimized by Holtek depending upon fSYS and the operating

voltage.

** Only these two clocking signal frequencies are supported by the Holtek sound library.

6

17th Nov ’98

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