HTG12G0 Просмотр технического описания (PDF) - Holtek Semiconductor

Номер в каталоге

Компоненты Описание

Список матч

HTG12G0

Microcontroller

Holtek Semiconductor 

HTG12G0

– The system will be awakened and returns

to the main program instruction following

the HALT command.

– The RTC interrupt will be held until the

system receives an enable interrupt com-

mand by which the RTC interrupt will be

serviced.

* Case 2: If the system is in an interrupt

enable state:

– The RTC interrupt will awake the system

and execute the RTC interrupt subrou-

tine.

– In the HALT mode, each bit of ports PP,

PS, can be used as wake-up signal by mask

option to wake-up the system. This signal

is active in low-going transition.

Sound effect

HTG12G0 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.

Whenever the instruction “SOUND n” or

“SOUND A” is executed, the specified sound

begins playing. Whenever “SOUND OFF” is

executed, it terminates the singing sound im-

mediately.

There are two singing modes, SONE mode and

SLOOP mode, which 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 specified

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 the sound effect circuit can be

selected by mask option.

Frequency

of

sound

effect

circuit

=

system clock

2m

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

Holtek’s sound library only supports sound

clock frequency 128K or 64K. To utilize Holtek’s

sound library, select the proper system clock

and mask option.

LCD display memory

The LCD display memory is embedded in the

data memory. It can be read and written to as

normal data memory.

The figure shows the mapping between display

memory and LCD pattern.

To turn on/off the display, the programmer just

writes 1/0 to the corresponding bit of the display

memory.

The LCD display module may have any form as

long as the number of the common is no more

than 8 and the segment is no more than 50.

LCD display memory

LCD driver output

The output number of the LCD driver is 50 × 8,

directly driving a 1/8 duty cycle and 1/5 bias

LCD. All LCD segments are at random during

initial clear mode.

The LCD has built-in bias voltage circuit. No

external resistor is needed.

The frequency of the LCD driving clock is fixed

at about 512Hz. This is set by RTC OSC

(32.768kHz).

12

14th May ’99

Share Link: