P89C668 datasheet(71/89 Pages) PHILIPS

71 / 89 page

Philips Semiconductors

Product data

P89C660/P89C662/P89C664/

P89C668

80C51 8-bit Flash microcontroller family

16KB/32KB/64KB ISP/IAP Flash with 512B/1KB/2KB/8KB RAM

2002 Oct 28

IAP CALL

PARAMETER

PROGRAM STATUS BYTE

Input Parameters:

R0 = osc freq (integer)

R1 = 06h

R1 = 86h (WDT feed, Rx2, 66x only)

DPH = 00h

DPL = 00h – program status byte

ACC = status byte

Return Parameter

ACC = 00 if pass; not 00 if fails

Sample routine:

;***** Program Status Byte (SB) *****

;***** DPTR indicates program status byte *****

;***** ACC holds new value of Status Byte to program *****

WRSB:

MOV

AUXR1,#20H

;set the ENBOOT bit

MOV

R0,#11

;FOSC

MOV

R1,#06H

;program status byte or boot vector

MOV

DPTR,#0000h

;specify status byte

MOV

A,NEW_SB

;

CALL

PGM_MTP

;execute the function

RET

PROGRAM BOOT VECTOR

Input Parameters:

R0 = osc freq (integer)

R1 = 06h

R1 = 86h (WDT feed, Rx2 & 66x only)

DPH = 00h

DPL = 01h – program boot vector

ACC = boot vector

Return Parameter

ACC = 00 if pass; not 00 if fails

Sample routine:

;***** Program Boot Vector (BV) *****

;***** DPTR indicates program boot vector *****

;***** ACC holds new value of boot vector to program *****

WRBV:

MOV

AUXR1,#20H

;set the ENBOOT bit

MOV

R0,#11

;FOSC

MOV

R1,#06H

;program status byte or boot vector

MOV

DPTR,#0001h

;specify boot vector

MOV

A,NEW_SB

;new value for the boot vector

CALL

PGM_MTP

;execute the function

RET

READ DEVICE DATA

Input Parameters:

R1 = 03h

R1 = 83h (WDT feed, Rx2 & 66x only)

DPTR = address of byte to read

Return Parameter

ACC = value of byte read

Sample routine:

;*****reads the Device Data (DData) *****

;***** DData returned in ACC *****

;***** DPTR holds address of byte to read *****

RDData:

MOV

AUXR1,#20H

;set the ENBOOT bit

MOV

R0,#11

;FOSC

MOV

R1,#03H

;read data function

MOV

DPTR,Address

;specify address of byte to read

CALL

PGM_MTP

;execute the function

RET

P89C668 датащи(PDF) 71 Page - NXP Semiconductors

P89C668 датащи(HTML) 71 Page - NXP Semiconductors

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 81 82 83 84 85 86 87 88 89

датащи скачать

ссылки URL