HT37B90 datasheet(17/80 Pages) HOLTEK

17 / 80 page

HT37B90/HT37B70/HT37B50/HT37B30

Rev.1.00

June22,2017

Example

The following example shows how to clear General Purpose Data Memory of bank0 by using MP0 and bank0~bank1

byusingMP1andMP2

code .section at 0 code

org 00h

RAM0TEST:

MOV

A,60H

MOV

MP0,A

; loaded with first RAM address

LOOP0:

CLR

IAR0

; clear the data at address defined by MP0

CLR

WDT

SIZ

MP0

; increase MP0, and skip out if MP0 is ²0²

JMP

LOOP0

RAM1TEST:

CLR

DACC.7

; access data to iar1 by MP1

CLR

rBP1

; clear RAM bank pointer 1

RAM1_MP1:

MOV

A,rBP1

; load rBP1 data, and check if rBP1 is ²25²

XOR

A,25

ZERO

; jump to exit loop if rBP1 is ²2²

JMP

RAM1TEST_Exit

MOV

A,60H

; loaded with first RAM address to MP1

MOV

MP1,A

LOOP1:

CLR

WDT

CLR

IAR1

; clear the data at address defined by MP1

SIZ

MP1

; increase MP1, and skip out if MP1 is ²0²

JMP

LOOP1

INC

rBP1

; increase rBP1

JMP

RAM1_MP1

RAM1TEST_Exit:

RAM2TEST:

Set

dacc.7

; access data to iar1 by MP2

CLR

rBP2

; clear RAM bank pointer 2

RAM1MP2:

MOV

A,RBP2

XOR

A,25

ZERO

; jump to exit loop if rBP2 is ²2²

JMP

RAM2TEST_Exit

MOV

A,60H

; loaded with first RAM address to MP2

MOV

MP2,A

LOOP2:

CLR

WDT

CLR

IAR1

; clear the data at address defined by MP2

SIZ

MP2

; increase MP2, and skip out if MP2 is ²0²

JMP

LOOP2

INC

rBP2

; increase rBP2

JMP

RAM1MP2

RAM2TEST_Exit:

HT37B90 Datasheet(PDF) 17 Page - Holtek Semiconductor Inc

HT37B90 Datasheet(HTML) 17 Page - Holtek Semiconductor Inc

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