HT86B40 datasheet(20/83 Pages) HOLTEK

20 / 83 page

HT86B40/HT86B50/HT86B60/HT86BR60

Pad Name

I/O

Options

Description

PA0~PA7

I/O

Wake-up,

Pull-high

or None

Bi-directional 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/

K0~K7

I/O

Pull-high

or None

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

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

Pins PB0~PB7 are pin-shared with C/R-F input pins K0~K7.

PD4/RCOUT

PD5/RR

PD6/RC

PD7/CC

I/O

Pull-high

or None

Bi-directional 4-bit I/O port. Software instructions determined the CMOS out-

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

Pins PD4~PD7 are pin-shared with R/F OSC input pins RR, RC and CC.

RCOUT: Capacitor or resistor connection pin to RC OSC for input.

RR: Oscillation input pin

RC: Reference resistor connection pin for output

CC: Reference capacitor connection pin for output

AUD

Audio output for driving an external transistor or for driving HT82V733

PWM1

PWM2

Audio 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

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