HT46R0664 datasheet(16/92 Pages) HOLTEK

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Rev. 1.00

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Rev. 1.00

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HT46R0664

Enhanced A/D+LCD Type 8-Bit OTP MCU

Progam Memory

The Program Memory is the location where the user code or program is stored. The device is

supplied with One-Time Programmable, OTP, memory where users can program their application

code into the device. By using the appropriate programming tools, OTP device offers users the

flexibility to freely develop their applications which may be useful during debug or for products

requiring frequent upgrades or program changes.

Structure

The Program Memory has a capacity of 4k×16. The Program Memory is addressed by the Program

Counter and also contains data, table information and interrupt entries information. Table data,

which can be setup in any location within the Program Memory, is addressed by separate table

pointer registers.

FFFH

16 bits

Time Base 1

Interrupt

Time Base 0

Interrupt

A/D

Interrupt

Timer 1

Interrupt

Timer 0

Interrupt

Multi-Function

Interrupt

Reset

Program Memory Structure

Special Vectors

Within the Program Memory, certain locations are reerved for special usage such as reset and

interrupts.

● Reset Vector

This vector is reserved for use by the device reset for program initialisation. After a device reset is

initiated, the program will jump to this location and begin execution.

● External interrupt vector

This vector is used by the external interrupt. If the external interrupt pin on the device receives an

edge transition, the program will jump to this location and begin execution if the external interrupt

is enabled anthe stack is not full. The external interrupt active edg transition type, whether high to

low, low to high or both is specified in the INTEG register.

● Timer/Event 0/1 counter interrupt vector

This internal vector is used by the Timer/Event Counters. If a Timer/Event Counter overflow

occurs, the program will jump to its respective location and begin execution if the associated

Timer/Event Counter interrupt is enabled and the stack is not full.

● Time base 0/1 interrupt vector

This internal vector is used by the internal Time Base 0/1. If a Time Base overflow occurs, the

program will jump to this location and begin execution if the Time Base counter interrupt is

enabled and the stack is not full.

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