HT45FM30 datasheet(21/188 Pages) HOLTEK

21 / 188 page

Rev. 1.20

De�e��e� 1�� 201�

Rev. 1.20

De�e��e� 1�� 201�

HT45FM30

Brushless DC Motor Flash MCU

Table Read Program Example

tempreg1 db ?

; temporary register #1

tempreg2 db ?

; temporary register #2

mov a,06h

; initialise low table pointer-note that this address

mov tblp,a

; is referenced

mov a,07h

; initialise high table pointer tbhp,a

mov tbhp,a

tabrd tempreg1

; transfers value in table referenced by table pointer

; data at program memory address “706H” transferred to

; tempreg1 and TBLH

dec tblp

; reduce value of table pointer by one

tabrd tempreg2

; transfers value in table referenced by table pointer

; data at program memory address “705H” transferred to

; tempreg2 and TBLH in this example the data “1AH” is

; transferred to tempreg1 and data “0FH” to register

; tempreg2

org 700h

; sets initial address of program memory

dc 00Ah, 00Bh, 00Ch, 00Dh, 00Eh, 00Fh, 01Ah, 01Bh

In Circuit Programming

TheprovisionofFlashtypeProgramMemoryprovidestheuserwithameansofconvenientand

easyupgradesandmodificationstotheirprogramsonthesamedevice.

Asanadditionalconvenience,Holtekhasprovidedameansofprogrammingthemicrocontroller

in-circuitusinga5-pininterface.Thisprovidesmanufacturerswiththepossibilityofmanufacturing

theircircuitboardscompletewithaprogrammedorun-programmedmicrocontroller,andthen

programmingorupgradingtheprogramatalaterstage.Thisenablesproductmanufacturerstoeasily

keeptheirmanufacturedproductssuppliedwiththelatestprogramreleaseswithoutremovaland

re-insertionofthedevice.

Holtek Writer Pin Name

MCU Programming Pins

Pin Description

ICPDA

PA0

P�og�a��ing Se�ial Data

ICPCK

PA2

P�og�a��ing Clo�k

ICPMS

PA7

P�og�a��ing Mode Sele�t

VDD

Powe� Supply

VSS

G�ound

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