HT56R64 datasheet(4/90 Pages) HOLTEK

4 / 90 page

Pin Name

I/O

Configuration

Option

Description

SEG31~SEG24

LCD driver outputs for LCD panel segments.

SEG23~SEG16

A bit in the LCD Control Register determines if the pins are to be used as

segment drivers or as CMOS outputs.

SEG8~SEG9

SEG10/SDO

SEG11/SDI/SDA

SEG12/SCK/SCL

SEG13/SCS

SEG14/PCLK

SEG15/PINT

I/O

SPI

PCLK

PINT

SEG8 and SEG9 are LCD driver outputs.

SEG10 is pin-shared with the Serial Interface Output line, SDO.

SEG11 is pin-shared with the SPI Bus data line, SDI and the I

2C Bus data

line SDA.

SEG12, is pin-shared with the SPI Bus clock line, SCK, and the I

2C Bus

clock line SCL.

SEG13 is pin-shared with the Serial Interface Select line, SCS.

SEG14 is pin-shared with the Peripheral Clock line, PCLK.

SEG15 is pin-shared with the Peripheral Interrupt line, PINT.

All of the SEG8~SEG15 lines can be chosen to be either segment drivers

or as logical outputs using LCD control bits.

SEG0~SEG7

LCD driver outputs for LCD panel segments.

SEG0~SEG7 can be chosen to be either segment drivers or as logical

outputs using LCD control bits.

OSC1

OSC2

Crystal or RC

or EC

OSC1, OSC2 are connected to an external RC network or external crys-

tal, determined by configuration option, for the internal system clock. If the

RC system clock option is selected, pin OSC2 can be used to measure the

system clock at 1/4 frequency. EC is external clock mode, we can input

clock source directly to OSC1 pin.

OSC3

OSC4

RTC

OSC3 and OSC4 are connected to a 32768Hz crystal oscillator to form a

real time clock for fSUB or fSL.

RES

Schmitt Trigger reset input. Active low.

VLCD1

¾¾

LCD power supply

VREF

Reference voltage input pin.

VMAX

IC maximum voltage, connect to VDD,VLCD or V1

V1, VLCD2, C1,

LCD voltage pump

VDD

¾¾

Positive power supply

AVDD

¾¾

Analog positive power supply.

VSS

¾¾

Negative power supply, ground

AVSS

¾¾

Analog negative power supply, ground

Note:

The Pin Description table represents the largest package available, therefore some of the pins and functions

may not be available on smaller package types.

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

IOL Total ..............................................................150mA

IOH Total............................................................

-100mA

Total Power Dissipation .....................................500mW

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 reliability.

HT56R64

Rev. 1.40

September 8, 2009

HT56R64 Datasheet(PDF) 4 Page - Holtek Semiconductor Inc

HT56R64 Datasheet(HTML) 4 Page - Holtek Semiconductor Inc

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