HTG13J0 datasheet(12/30 Pages) HOLTEK

12 / 30 page

HT13J0

May19,1999

Initialreset:1000H.

Interrupt(enabled):1008Hor0008H.

Interrupt (disabled): next address of HALT in-

struction.

In HALT mode, each bit of ports PP, PS, can be

used as external interrupt by mask option to

wake-up the system. This signal is active in

low-goingtransition.

Soundeffect

HTG13J0 provides sound effect circuit which

offers up to 16 sounds with 3 effects of tone,

boom and noise. Holtek supports a sound li-

brary which have melody, alarm, machine gun

shooting, etc. That can meet various require-

ments.

Whenever the instruction "SOUND n" or

"SOUND A" is executed, the specified sound be-

gin playing. Whenever "SOUND OFF" is exe-

cuted, it terminates the singing sound

immediately.

There are two singing mode, SONE mode and

SLOOP mode, this is activated by "SOUND

ONE" and "SOUND LOOP". In SONE mode,

the sound that has been specified plays just

once. In SLOOP mode, the sound being speci-

fiedkeepsplayingrepeatedly.

Since sound 0~11 contain 32 notes, sound

12~15 contain 64 notes, the later possess better

soundthantheformer.

The frequency of sound effect circuit can be se-

lectedbymaskoption.

Wherem=0,1,2,3,4,5

The Holtek s sound library only supports

sound clock frequency 128K or 64K. If it is de-

sired to utilize Holtek s sound library, proper

system clock and mask option should be se-

lected.

LCDdisplaymemory

As mentioned in the data memory section, the

LCD display memory is embedded in the data

memory. It can be read and written to as nor-

maldatamemory.

The following figure shows the mapping be-

tweendisplaymemoryandLCDpattern.

To turn on/off the display, the programmer just

writes 1/0 to the corresponding bit of the dis-

playmemory.

The LCD display module may have any form as

long as the number commons is no more than 8

andthesegmentisnomorethan40.

LCDdriveroutput

The output number of the LCD driver is 40

´ 8.

That can directly drive an LCD with 1/8 duty

cycle and 1/5 bias. All LCD segments are ran-

domattheinitialclearmode.

The bias voltage circuit of the LCD display is

built-in.Noexternalresistorisneeded.

The LCD driving clock frequency shall be fixed

in 512Hz. That can not be selected by the user,

and Holtek will set it according to the applica-

tion.

COM

DISPLAY MEMORY

FFH

FDH FBH F9H

FEH

FCH FAH F8H

BIT

SEGMENT

LCDdisplaymemory

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