HT95R34 datasheet(3/59 Pages) HOLTEK

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Pin Description

Pad Name

I/O

Options

Description

PA0~PA7

I/O

Pull-high

Wake-up

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

be configured as a wake-up input by a configuration option. Software in-

structions determine if the pin is a CMOS output or Schmitt Trigger input.

Configuration options determine which pins on the port have pull-high re-

sistors.

PC0, PC5, PC7 I/O

Pull-high

Bidirectional input/output port. Software instructions determine if the pin

is a CMOS output or Schmitt Trigger input. Configuration options deter-

mine which pins on the port have pull-high resistors. When the

multi-function interrupt is enabled an interrupt will be generated when-

ever PC0 or PC5 has a falling edge, or PC7 has a rising edge.When in

the idle mode such an interrupt will wake up the device.

PC1, PC4, PC6 I/O

Pull-high

Bidirectional input/output port. Software instructions determine if the pin

is a CMOS output or Schmitt Trigger input. Configuration options deter-

mine which pins on the port have pull-high resistors.

PC2, PC3

NMOS output structures

PD0~PD7

I/O

Pull-high

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

pin is a CMOS output or Schmitt Trigger input. Configuration options de-

termine which nibble on the port have pull-high resistors.

PE0~PE3

I/O

Pull-high

Bidirectional 4-bit input/output port.Software instructions determine if the

pin is a CMOS output or Schmitt Trigger input. Configuration options de-

termine if all the pins on the port have pull-high resistors.

INT

External interrupt Schmitt trigger input. Edge trigger activated on high to

low transition. No pull-high resistor.

TMR0

Timer/Event Counter 0 Schmitt trigger input . No pull-high resistor.

TMR1

Timer/Event Counter 1 Schmitt trigger input . No pull-high resistor.

DTMF

Dual Tone Multi Frequency Output

MUSIC

CMOS output structure Programmable Frequency Divider pin.

RT/GT

I/O

Tone acquisition time and release time can be set through connection

with external resistor and capacitor CMOS IN/OUT

EST

Early steering output CMOS out

Operational amplifier non-inverting input

Operational amplifier inverting input

Operational amplifier output terminal

VREF

Reference voltage output, normally VDD/2

X1 and X2 are connected to an external 32768Hz crystal or resonator for

the system clock.

¾¾

External low pass filter pin used for the frequency up conversion circuit.

RES

Schmitt trigger reset input. Active low.

VDD

¾¾

Positive power supply

VSS

¾¾

Negative power supply, ground.

VDD2

¾¾

DTMF receiver positive power supply

VSS2

¾¾

DTMF receiver negative power supply

Note:

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

HT95R34

Rev. 1.10

February 18, 2009

HT95R34 数据表(PDF) 3 Page - Holtek Semiconductor Inc

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HT95R34 数据表(PDF) 3 Page - Holtek Semiconductor Inc

HT95R34 数据表(HTML) 3 Page - Holtek Semiconductor Inc

Html Pages

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数据表 下载

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