HT83F02 datasheet(19/64 Pages) HOLTEK

19 / 64 page

HT83F02

Rev. 1.20

November 19, 2010

Voice Control and Audio output Registers

DAL, DAH, VOL

The devices include a single 12-bit current type DAC

function for driving an external 8

W speaker through an

external NPN transistor or Power Amplifier. The pro-

grammer must writer the voice data to these DAL/DAH

registers. The programmer can control the DAC volume

with 8-levels via the VOL register.

Pulse Width Modulator Registers

PWMC, PWML, PWMH

Each device contains a single 12-bit PWM function for

driving an external 8

W speaker. The programmer must

writer the voice data to PWML/PWMH register. The pro-

grammer can control the PWM volume with 9-levels via

the VOL register.

Serial Interface Module(SIM) Registers

SIMC0A/B, SIMC1A/B, SIMC2A/B, SIMARA/B,

SIMDRA/B

Each SIM contains SPI and I

2C function for communicat-

ing with other microcontroller or SPI Flash Memory. All

devices contain an integrated I

2C and SPI bus which in-

terfaces to the external shared pins SDA, SCL and

SCSB, SCK, SDI, SDO with PB on the microcontroller.

The I

2C correct setup and data transfer operation of this

2-line bidirectional bus utilizes 4 special function regis-

ters. The SIMARA/B register sets the slave address of

the device while the SIMC0A/B is the control register

that enables or disables the device as well as select

whether it is in I

2C or SPI mode. The SIMC1A/B register

is the I

2C status register while the SIMDRA/B register is

the input/output data register. The SPI correct setup and

data transfer operation of this 3-line bidirectional bus uti-

lizes 3 special function registers. The SIMC0A/B is the

control register that enables or disables the device as

well as select whether it is in I

2C or SPI mode. The

SIMC2A/B register is the SPI status register while the

SIMDRA/B register is the input/output data register.

Input/Output Ports

Holtek microcontrollers offer considerable flexibility on

their I/O ports. With the input or output designation of ev-

ery pin fully under user program control, pull-high op-

tions for all ports and wake-up options on certain pins,

the user is provided with an I/O structure to meet the

needs of a wide range of application possibilities.

Depending upon which device or package is chosen,

the microcontroller range provides from 19 bidirectional

input/output lines labeled with port names PA, PB, PC

etc. These I/O ports are mapped to the Data Memory

with specific addresses as shown in the Special Pur-

pose Data Memory table. All of these I/O ports can be

used for input and output operations. For input opera-

tion, these ports are non-latching, which means the in-

puts must be ready at the T2 rising edge of instruction

²MOV A,[m]², where m denotes the port address. For

output operation, all the data is latched and remains un-

changed until the output latch is rewritten.

Pull-high Resistors

Many product applications require pull-high resistors for

their switch inputs usually requiring the use of an exter-

nal resistor. To eliminate the need for these external re-

sistors, all I/O pins, when configured as an input have

the capability of being connected to an internal pull-high

resistor. These pull-high resistors are selectable via

configuration or software options and are implemented

using a weak PMOS transistor. Note that if the pull-high

option is selected, then all I/O pins on that port will be

connected to pull-high resistors, individual pins can be

selected for pull-high resistor options.

Port A Wake-up

Each device has a HALT instruction enabling the

microcontroller to enter a Power Down Mode and pre-

serve power, a feature that is important for battery and

other low-power applications. Various methods exist to

wake-up the microcontroller, one of which is to change

the logic condition on one of the Port A pins from high to

low. After a

²HALT² instruction forces the microcontroller

into entering a HALT condition, the processor will re-

main idle or in a low-power state until the logic condition

of the selected wake-up pin on Port A changes from high

to low. This function is especially suitable for applica-

tions that can be woken up via external switches. Note

that each pin on Port A can be selected individually to

have this wake-up feature.

I/O Port Control Registers

Each I/O port has its own control register PAC, PBC and

PCC, to control the input/output configuration. With this

control register, each CMOS output or input with or with-

out pull-high resistor structures can be reconfigured dy-

namically under software control. Each pin of the I/O

ports is directly mapped to a bit in its associated port

control register. For the I/O pin to function as an input,

the corresponding bit of the control register must be writ-

ten as a

²1². This will then allow the logic state of the in-

put pin to be directly read by instructions. When the

corresponding bit of the control register is written as a

²0², the I/O pin will be setup as a CMOS output. If the pin

is currently setup as an output, instructions can still be

used to read the output register. However, it should be

noted that the program will in fact only read the status of

the output data latch and not the actual logic status of

the output pin.

HT83F02 Datasheet(PDF) 19 Page - Holtek Semiconductor Inc

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