HT46R92 datasheet(3/61 Pages) HOLTEK

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Pin Description

Pin Name

I/O

Configuration

Option

Description

PA0/BZ

PA1/BZ

PA2/TMR

PA3

PA4/PWM0

PA5/PWM1

PA6, PA7

I/O

Pull-high,

Wake-up,

BZ/BZ,

PWM0~PWM1

Bidirectional 8-bit input/output port. Each individual pin on this port can be config-

ured as a wake-up input by a configuration option. Software instructions deter-

mine if the pin is a CMOS output or Schmitt Trigger input. A configuration option

determines if all pins on the port have pull-high resistors. Pins PA0, PA1, PA2,

PA4 and PA5 are pin-shared with BZ, BZ, TMR, PWM0 and PWM1, respectively.

PB0/AN0

PB1/AN1

PB2/AN2

PB3/AN3

PB4/AN4

PB5/AN5

PB6, PB7

I/O

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

CMOS output or Schmitt Trigger input. PB is pin-shared with the A/D input pins.

The A/D inputs are selected via software instructions. Once selected as an A/D in-

put, the I/O function is disabled automatically.

PC0~PC3

PC4/COM0

PC5/COM1

PC6/COM2

PC7/COM3

8-bit CMOS output port.

PC4~PC7 can be used as COM0~COM3.

PD0/INT

PD1~PD7

I/O

8-bit CMOS output port. PD0 is pin-shared with the external interrupt input pin.

PE0~PE7

8-bit CMOS output port.

OSC1

OSC2

Crystal or RC

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

mined 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.

OSC3

OSC4

OSC3 and OSC4 are connected to an external 32768Hz crystal oscillator to im-

plement a system clock and real time clock.

RES

Schmitt Trigger reset input. Active low.

VDD

¾¾

Positive power supply

VSS

¾¾

Negative power supply, ground

VREF

A/D Reference voltage input pin.

VDDB

VDDC

¾¾

PB & PC port positive power supply

VSSD,

VSSE

¾¾

PD & PE port negative power supply, ground

Note:

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

2. As the table applies to the larger package size not all pins may exist on the smaller packages.

HT46R92

Rev. 1.10

November 5, 2008

HT46R92 Datenblatt(PDF) 3 Page - Holtek Semiconductor Inc

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