HT67F60 datasheet(74/242 Pages) HOLTEK

74 / 242 page

Rev. 1.50

March 06 , 2012

Rev. 1.50

March 06 , 2012

HT67F30/HT67F40/HT67F50/HT67F60

TinyPowerTM A/D Flash Type 8-Bit MCU with LCD & EEPRO

Reset Initial Conditions

The different types of reset described affect the reset flags in different ways. These flags, known as

PDF and TO are located in the status register and are controlled by various microcontroller

operations, such as the SLEEP or IDLE Mode function or Watchdog Timer. The reset flags are

shown in the table:

PDF

RESET Conditions

Power-on reset

RES or LVR reset during NORMAL or SLOW Mode operation

WDT time-out reset during NORMAL or SLOW Mode operation

WDT time-out reset during IDLE or SLEEP Mode operation

Note: "u" stands for unchanged

The following table indicates the way in which the various components of the microcontroller are

affected after a power-on reset occurs.

Item

Condition After RESET

Program Counter

Reset to zero

Interrupts

All interrupts will be disabled

WDT

Clear after reset, WDT begins counting

Timer/Event Counter

Timer Counter will be turned off

Input/Output Ports

I/O ports will be setup as inputs, and AN0~AN11 in as A/D input pin.

Stack Pointer

Stack Pointer will point to the top of the stack

The different kinds of resets all affect the internal registers of the microcontroller in different ways.

To ensure reliable continuation of normal program execution after a reset occurs, it is important to

know what condition the microcontroller is in after a particular reset occurs. The following table

describes how each type of reset affects each of the microcontroller internal registers. Note that

where more than one package type exists the table will reflect the situation for the larger package

type.

HT67F60 датащи(PDF) 74 Page - Holtek Semiconductor Inc