HTG13J0 データシートの表示（PDF） - Holtek Semiconductor

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HTG13J0

4-Bit Microcontroller

Holtek Semiconductor 

HT13J0

Initial reset: 1000H.

Interrupt (enabled): 1008H or 0008H.

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-going transition.

Sound effect

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-

fied keeps playing repeatedly.

Since sound 0~11 contain 32 notes, sound

12~15 contain 64 notes, the later possess better

sound than the former.

The frequency of sound effect circuit can be se-

lected by mask option.

Where m=0, 1, 2, 3, 4, 5

=

m

2m

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.

LCD display memory

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-

mal data memory.

The following figure shows the mapping be-

tween display memory and LCD pattern.

COM

DISPLAY MEMORY

FEH FCH FAH F8H

B4 B2 B0

BIT

0

0

1

1

2

2

3

3

FFH FDH FBH F9H B5 B3 B1

4

0

5

1

6

2

7

3

SEGMENT 0 1 2 3

37 38 39

LCD display memory

To turn on/off the display, the programmer just

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

play memory.

The LCD display module may have any form as

long as the number commons is no more than 8

and the segment is no more than 40.

LCD driver output

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-

dom at the initial clear mode.

The bias voltage circuit of the LCD display is

built-in. No external resistor is needed.

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.

12

May 19, 1999

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