HTG13J0 datasheet(13/30 Pages) HOLTEK

13 / 30 page

HT13J0

May19,1999

An example of an LCD driving waveform (1/8

dutyand1/5bias)isshownbelow.

Oscillatorcircuit

Only one external resistor is needed for HTG13J0

oscillator circuit.

The system clock is also used as the reference sig-

nal of LCD driving clock, sound effect clock, and

internal TIMER frequency source.

One HTG13J0 machine cycle consists of a se-

quence of 4 states numbered T1 to T4. Each state

lasts for one oscillator period. The machine cycle

is 4

ms, if the system frequency is up to 1.0MHz.

Inputports PS,PP

All ports can have internal pull high resistors

determined by mask option. Every bit of the in-

put ports PP and PS can be specified to be a

trigger source to wake up the HALT interrupt

by mask option. A high to low transition on one

of these pins will wake up the device from a

HALTstatus.

Outputport PA0~PA2

A mask option is available to select whether the

output is a CMOS or open drain NMOS type.

After an initial clear, the output port PA de-

faultshighforCMOSorfloatingforNMOS.

Note:

PA3 controls bit 13 of the program memory. Be

careful about PA3. When instruction "OUT PA,A"

isoperated,portA ischangedaswell.

Maskoption

The following options are available by mask op-

tion which must be selected prior to manufac-

turing.

· Each bit of input ports PS, PP with or without

pull-highresistor.

· Each bit of input ports PS, PP function as

HALTinterrupttrigger.

· Each bit of output port PA0~PA2 with CMOS

oropendrainNMOS.

· 8 bit programmable TIMER with internal fre-

quency sources. There are 13 (the sixth stage

is reserved for internal use) internal fre-

quency sources which can be selected as

clockingsignal.

· Sixkindsofsoundclockfrequency:

fSYS/2

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

12345678123

VDD

4/5 VDD

3/5 VDD

2/5 VDD

1/5 VDD

GND

COM0

512Hz

64Hz

COM1

SEG0

VDD

4/5 VDD

3/5 VDD

2/5 VDD

1/5 VDD

GND

VDD

4/5 VDD

3/5 VDD

2/5 VDD

1/5 VDD

GND

mask option

internal bus

VDD

Outputport

- PA0~PA2

VDD

internal bus

wake-up

pull-high

mask

option

read control

wake-up

mask

option

HTG13J0 Scheda tecnica(PDF) 13 Page - Holtek Semiconductor Inc

HTG13J0 Scheda tecnica(HTML) 13 Page - Holtek Semiconductor Inc

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