HT37B70 datasheet(13/80 Pages) HOLTEK

13 / 80 page

HT37B90/HT37B70/HT37B50/HT37B30

Rev.1.00

June22,2017

tempreg1 db

; temporary register #1

tempreg2 db

; temporary register #2

tempreg3 db

; temporary register #3

tempreg4 db

; temporary register #4

mov a,01h

; set ROM bank 1 point

mov bp1,a

mov a,06h

; initialise table pointer

mov tblp1,a

; to the last page

clr tbmpl

clr tbhpl

tabrdl

tempreg1

; transfers value in table referenced by table pointer

; to tempregl

; data at prog. memory address ²3F06H² transferred to

; tempreg1 and TBLH

dec tblp1

; reduce value of table pointer by one

tabrdl

tempreg2

; transfers value in table referenced by table pointer

; to tempreg2

; data at prog.memory address ²3F05H² transferred to

; tempreg2 and TBLH

; in this example the data ²1AH² is transferred to

; tempreg1 and data ²0FH² to register tempreg2

; the value ²00H² will be transferred to the high byte

; register TBLH

mov a,04h

; initialise table pointer low byte

mov tblp1,a

;

mov a,3Fh

; initialise table pointer middle byte

mov tbmp1,a

mov a,00h

; initialise table pointer high byte

mov tbhp1,a

tabrdc

tempreg3

;

rombank 1 romsumvalue1; sets rombank 1 initial address of last page

;(for HT37B90/70/50/30)

romsumvalue1 .section at 1F00h ¢code¢

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

Instruction

TableLocationBits

b18~b13

b12~b8

TABRDC [m] TBHP1_2~TBMP1_5 TBMP1_4~TBMP1_0

TABRDL [m]

BP1_5~BP1_0

11111

TableLocation

Note:

@7~@0:Tablepointerlower-orderbitsareTBLP1[7:0]

b17~b0:CurrentprogramROMtableaddressA [18:0]

TBMP1_4~TBMP1_0:TBMP1bit4~0

TBHP1_2~TBMP1_5:TBHP1(bit2~0)toTBMP1(bit7~5)

BP1_5~BP1_0:BitsofbankBP1bit0~5

FortheHT37B90,theTableaddresslocationis19bitswide, i.e.fromb18~b0.

FortheHT37B70,theTableaddresslocationis18bitswide, i.e.fromb17~b0.

FortheHT37B50,theTableaddresslocationis17bitswide, i.e.fromb16~b0.

FortheHT37B30,theTableaddresslocationis16bitswide, i.e.fromb15~b0.

HT37B70 Datasheet(PDF) 13 Page - Holtek Semiconductor Inc

HT37B70 Datasheet(HTML) 13 Page - Holtek Semiconductor Inc

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80

Datasheet Download

Link URL