HT67F60 datasheet(185/242 Pages) HOLTEK

185 / 242 page

HT67F30/HT67F40/HT67F50/HT67F60

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

Rev. 1.50

184

March 06 , 2012

Rev. 1.50

185

March 06 , 2012

Interrupts

Interrupts are an important part of any microcontroller system. When an external event or an internal

function such as a Timer Module or an A/D converter requires microcontroller attention, their

corresponding interrupt will enforce a temporary suspension of the main program allowing the

microcontroller to direct attention to their respective needs. The device contains several external

interrupt and internal interrupts functions. The external interrupts are generated by the action of the

external INT0~INT3 and PINT pins, while the internal interrupts are generated by various internal

functions such as the TMs, Comparators, Time Base, LVD, EEPROM, SIM, SPIA and the A/D

converter.

Interrupt Registers

Overall interrupt control, which basically means the setting of request flags when certain

microcontroller conditions occur and the setting of interrupt enable bits by the application program,

is controlled by a series of registers, located in the Special Purpose Data Memory, as shown in the

accompanying table. The number of registers depends upon the device chosen but fall into three

categories. The first is the INTC0~INTC3 registers which setup the primary interrupts, the second is

the MFI0~MFI3 registers which setup the Multi-function interrupts. Finally there is an INTEG

Each register contains a number of enable bits to enable or disable individual registers as well as

interrupt flags to indicate the presence of an interrupt request. The naming convention of these

follows a specific pattern. First is listed an abbreviated interrupt type, then the (optional) number of

that interrupt followed by either an “E” for enable/disable bit or “F” for request flag.

Function

Enable Bit

Request Flag

Notes

Global

EMI

—

Comparator

CPnE

CPnF

n = 0 or 1

INTn Pin

INTnE

INTnF

n = 0~3

A/D Converter

ADE

ADF

—

Multi-function

MFnE

MFnF

n = 0~5

Time Base

TBnE

TBnF

n = 0 or 1

SIM

SIME

SIMF

—

SPIA

SPIAE

SPIAF

—

LVD

LVE

LVF

—

EEPROM

DEE

DEF

—

PINT Pin

XPE

XPF

—

TnPE

TnPF

n = 0~3

—

TnAE

TnAF

—

TnBE

TnBF

—

Interrupt Register Bit Naming Conventions

HT67F60 Datasheet(PDF) 185 Page - Holtek Semiconductor Inc

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