HT9480 datasheet(4/47 Pages) HOLTEK

4 / 47 page

Pin No

Pin Name

I/O

Function

35~38

COM3~COM0

Outputs for LCD panel common connections

TSC

MCU test mode input pin, active low with pull-high resistor

Decoder test mode input pin, active low with a pull-high resistor

BAL

Battery low indication input, active high without pull-high resistor

POCSAG code input serial data (inverting or non-inverting as determined

by SPF32). CMOS input without pull-high resistor

BS1

Pager receiver power control enable output, CMOS output

BS2

RF dc level adjustment pin, CMOS output

BS3

PLL control pin, CMOS output

FOUT

Frequency reference output pin

The FOUT output pin produces a 76.8kHz/153.6kHz signal with a 1/2 duty

cycle reference frequency if a 76.8kHz crystal is used.

Absolute Maximum Ratings

Supply Voltage .........................................

-0.3V to 5.5V

Storage Temperature ............................

-50°Cto125°C

Input Voltage..............................VSS

-0.3V to VDD+0.3V

Operating Temperature...........................

-25°Cto85°C

Note: These are stress ratings only. Stresses exceeding the range specified under

²Absolute Maximum Ratings² may

cause substantial damage to the device. Functional operation of this device at other conditions beyond those

listed in the specification is not implied and prolonged exposure to extreme conditions may affect device reliabil-

ity.

D.C. Characteristics

Ta=25

°C

Symbol

Parameter

Test Conditions

Min.

Typ.

Max.

Unit

VDD

Conditions

VDD

Operating Voltage

¾ 3V application

2.4

3.0

3.3

IDD

Operating Current

No load, fsys=153.6kHz

300

¾mA

ISTB1

Standby Current 1

No load, System HALT

(Watchdog ON)

200

¾mA

ISTB2

Standby Current 2

No load, System HALT

(Watchdog OFF)

¾¾

VIL

Input Low Voltage for Input Port and I/O

Port

VIH

Input High Voltage for Input Port and I/O

Port

2.4

VIL1

Input Low Voltage (RES,TMR1,BAL)

VIH1

Input High Voltage (RES,TMR1,BAL)

2.4

VIL2

Input Low Voltage (BAF)3V

0.9

VIH2

Input High Voltage (BAF)3V

1.3

IOL

I/O Port Sink Current

VOL=0.3V

1.7

3.4

IOH

I/O Port Source Current

VOH=2.7V

-1

-1.9

IOL

Segment 0-34 Output Sink Current

VOL=0.3V

¾mA

IOH

Segment 0-34 Output Source Current

VOH=2.7V

-20

-38

¾mA

HT9480

Rev. 1.20

July 31, 2002

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