HT86B50 datasheet(19/83 Pages) HOLTEK

19 / 83 page

Pin Description

HT86B03/HT86B10/HT86B20/HT86B30/HT86BR10/HT86BR30

Pad Name

I/O

Options

Description

PA0~PA7

I/O

Wake-up,

Pull-high

or None

Bidirectional 8-bit I/O port. Software instructions determined the CMOS out-

put or Schmitt trigger with a pull-high resistor (determined by option).

PB0~PB7

I/O

Pull-high

or None

Bidirectional 8-bit I/O port. Software instructions determined the CMOS out-

put or Schmitt trigger with a pull-high resistor (determined by option). The

HT86B03 device only has PB4~PB7 port pins.

AUD

Audio output for driving an external transistor or for driving HT82V733

PWM1

PWM2

Audio PWM outputs.

The HT86B03 has no PWM outputs.

RES

Schmitt trigger reset input. Active low.

INT

Falling Edge

Trigger or

Falling/Rising

Edge Trigger

External interrupt Schmitt trigger input without pull-high resistor. A configura-

tion option determines if the interrupt active edge is a falling edge only or both

a falling and rising edge. Falling edge triggered active on a high to low transi-

tion. Rising edge triggered active on a low to high transition. Input voltage is

the same as operating voltage.

OSC1

OSC2

Crystal or RC

OSC1, OSC2 are connected to an external RC network or external crystal,

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 sys-

tem clock at 1/4 frequency.

VDD

¾¾

Positive digital power supply

VSS

¾¾

Negative digital power supply, ground.

VDDA

¾¾

Positive DAC circuit power supply

VSSA

¾¾

Negative DAC circuit power supply, ground.

VDDP

¾¾

Positive audio PWM circuit power supply

VSSP

¾¾

Negative audio PWM circuit power supply, ground.

Note: 1. Each pin on PA can be programmed through a configuration option to have a wake-up function.

2. Individual pins can be selected to have pull-high resistors.

HT86BXX/HT86BRXX

Rev. 1.70

February 22, 2010

HT86B50 データシート(PDF) 19 Page - Holtek Semiconductor Inc

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