HT82A834R datasheet(4/49 Pages) HOLTEK

4 / 49 page

Pin Name

I/O

Description

AVSS3

ADC negative power supply, ground

PB7~PB0

I/O

Bidirectional 8-bit input/output port. Software instructions determine if the pin is a CMOS output

or Schmitt trigger input with pull-high resistor (determined by pull-high options, bit option).

DVSS2

Negative digital & I/O power supply, ground

PC7/SCK

I/O

Can be software optioned as a bidirectional input/output or serial interface clock signal.

PC6/SCS

I/O

Can be software optioned as a bidirectional input/output or serial interface slave select signal.

PC5/SDI

I/O

or I

Can be software optioned as a bidirectional input/output or serial data input.

PC4/SDO

I/O

or O

Can be software optioned as a bidirectional input/output or serial data output.

PC3

I/O

Bidirectional I/O lines. Software instructions determine if the pin is a CMOS output or Schmitt

trigger input with pull-high resistor (determined by configuration option).

PC2/TMR1,

PC1/TMR0

I/O

Software instructions determine if the pin is a CMOS output or Schmitt trigger input with pull-high

resistor. TMR0, TMR1 are pin shared with PC1, PC2 respectively

PC0/BZ

I/O

or O

Can be software optioned as a bidirectional input/output or as a PFD output.

OSCI

OSCO

OSCI, OSCO are connected to an 6MHz or 12MHz crystal/resonator (determined by software

instructions) for the internal system clock

RESET

Schmitt trigger reset input, active low

DVDD1

Positive digital power supply

USBDN

I/O

USBD- line. The USB function is controlled by a software control register

USBDP

I/O

USBD+ line. The USB function is controlled by a software control register

V33O

3.3V regulator output

DVSS1

Negative digital power supply, ground

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.

HT82A834R

Rev. 1.00

August 27, 2007

HT82A834R Datasheet(PDF) 4 Page - Holtek Semiconductor Inc

HT82A834R Datasheet(HTML) 4 Page - Holtek Semiconductor Inc

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