HT46R63 datasheet(5/44 Pages) HOLTEK

5 / 44 page

Pin Name

I/O

Option

Description

OSC1

OSC2

RC or crystal

A resistor across OSC1 and VDD or a crystal across OSC1 and OSC2 will

generate a system clock.

OSC3

OSC4

32768Hz crystal across OSC3 and OSC4 will generate RTC clock signal

which only provides system timing.

CMPN

Negative input for comparator

CMPP

Positive input for comparator

CMPO

Comparator output

CHGO

Comparator output with 32768Hz carrier

VDD

¾¾

Positive power supply

AVDD

¾¾

A/D converter Positive power supply, AVDD should be externally con-

nected to VDD

VSS

¾¾

Negative power supply, ground

RES

Schmitt trigger reset input

VLCD

I/O

LCD highest voltage; should be connected to VDD with external resistor.

SEG0~SEG18

SEG7~SEG18

logical CMOS

LCD segment signal driving outputs SEG7~SEG10 can be optioned as out-

put lines. SEG11~SEG14, SEG15~SEG18 can be optioned as a high sink-

ing output lines.

COM0~COM2

COM3/SEG19

COM3 or

SEG19

LCD common signal driving outputs

Absolute Maximum Ratings

Supply Voltage ...........................VSS

-0.3V to VSS+6.0V

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

-50°Cto125°C

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

-0.3V to VDD+0.3V

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

-40°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

fSYS=4MHz

2.2

5.5

fSYS=8MHz

3.3

5.5

IDD1

Operating Current (RC OSC)

(Analog Circuit Disabled)

No load, fSYS=4MHz

IDD2

Operating Current

(RC OSC)

No load, fSYS=4MHz

IDD3

Operating Current

No load, fSYS=8MHz

ISTB1

Standby Current

(WDT OSC On, RTC Off, LCD Off)

No load,

System HALT

¾¾

ISTB2

Standby Current

(WDT OSC Off, RTC Off, LCD Off)

System HALT

¾¾

HT46R63/HT46C63

Rev. 1.90

May 17, 2004

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