HTG2190 datasheet(32/50 Pages) HOLTEK

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HTG2190

Rev. 1.20

July 5, 2002

The audio output

The HTG2190 series provide a 12-bits current type DAC

devices for driving an external 8

W speaker through an

external NPN transistor. The programmer must write the

voice data to the register DAL (30H) and DAH (31H).

Only 12 bits which include the high nibble of DAL and

the whole byte of DAH are used. The correct procedure

for DAC output as shown below, high nibble data of DAL

must be written next at first, and then the DAH data is

written.

There are 16 scales of volume controllable level that are

provided for the current type DAC output. The program-

mer only writes the volume control data to the VOLC

Note that writing 0H to the high nibble of VOLC does not

denote mute output, this means there is still leakage

from AUD pin through external NPN transistor, and also

external 8

W speaker leak current. Only load 00h to

DAH-DAL will turn off DAC and prevent leakage.

D A H

( D 0 ~ D 7 )

D A L

( D 4 ~ D 7 )

V O L C

( D 4 ~ D 7 )

D A C

A U D

P I N

C 1 1 ~ C 0

V 3 ~ V 0

D a t a B u s

Mask option

The following shows many kinds of mask options in the HTG2190. All these option should be defined on order to en-

sure proper system functioning.

No.

Mask Option

WDT enable or disable selection.

WDT can be enable or disable by mask option.

Wake-up selection. This option defines the wake-up function activity.

External I/O pins (PA only) all have the capability to wake-up the chip from a HALT mode by a following edge.

External interrupt input pin share with other function selection.

INT/SEG37: INT can be set as an external interrupt input pin or LCD segment output pin.

I/O pins share with other functions selection.

PB0/PWM1: PB0 can be set as I/O pin or positive audio PWM output pin.

PWM2/AUD: PWM2 can be set as negative PWM output pin or current type D/A output pin.

PB4/SOUT: PB4 can be set as I/O pin or serial data output pin.

PB5/SCLK: PB5 can be set as I/O pin or serial driving clock pin.

PB6/TMR1/RTF: PB6 can be set as I/O pin, Timer/Event Counter 1 input pin or resistor to frequency input pin.

PB7/TMR0: PB7 can be set as I/O pin or Timer/Event Counter 0 input pin.

I/O pins share with other function selection.

PC0/SEG56, PC1/SEG57, PC2/SEG58, PC3/SEG59, PC4/SEG60, PC5/SEG61: PC0~PC5 can be set as

I/O pins or LCD segment output pins.

PC6/SEG63/XIN, PC7/SEG62/XOUT: PC6, PC7 can be set as I/O pins, LCD segment output pins or XIN,

XOUT pins are connect to 32768Hz crystal.

Segment output pins share with other function selection.

SEG55~SEG48/PD7~PD0: SEG55~SEG48 can be set as LCD segment output pins or I/O pins.

SEG47~SEG40/PE7~PE0: SEG47~SEG40 can be set as LCD segment output pins or I/O pins

LCD common selection. There are two types of selection: 8-common or 16-common

LCD type selection. There are two types of selection: black/white LCD or color ECB

HTG2190 Datasheet(PDF) 32 Page - Holtek Semiconductor Inc

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