參數(shù)資料
型號： P89C662
廠商： NXP Semiconductors N.V.
英文描述： 80C51 8-Bit Flash Microcontroller 32KB ISP/IAP FLASH with 1KB RAM(80C51 8位閃速微控制器，帶16KB ISP/IAP閃速存儲器和1KB RAM)
中文描述： 80C51的8位閃存微控制器具有32KB的ISP /聯(lián)合會與1kB的內存（80C51的8位閃速微控制器，帶16KB的供應商/聯(lián)合會閃速存儲器和閃存的1kB的RAM）
文件頁數(shù)： 69/89頁
文件大?。?/td> 490K
代理商： P89C662
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
69
In Application Programming Method
Several In Application Programming (IAP) calls are available for use
by an application program to permit selective erasing and
programming of Flash sectors. All calls are made through a common
interface, PGM_MTP. The programming functions are selected by
setting up the microcontroller’s registers before making a call to
PGM_MTP at FFF0H. The oscillator frequency is an integer number
rounded down to the nearest megahertz. For example, set R0 to 11
for 11.0592 MHz. Results are returned in the registers. The IAP calls
are shown in Table 15.
Using the Watchdog Timer (WDT)
The 89C66x devices support the use of the WDT in IAP. The user
specifies that the WDT is to be fed by setting the most significant bit
of the function parameter passed in R1 prior to calling PGM_MTP.
The WDT function is only supported for Block Erase when using the
Quick Block Erase. The Quick Block Erase is specified by
performing a Block Erase with register R0 = 0. Requesting a WDT
feed during IAP should only be performed in applications that use
the WDT since the process of feeding the WDT will start the WDT if
the WDT was not working.
Table 15.
IAP calls
IAP CALL
PARAMETER
PROGRAM DATA BYTE
Input Parameters:
R0 = osc freq (integer)
R1 = 02h
R1 = 82h (WDT feed, Rx2 & 66x only)
DPTR = address of byte to program
ACC = byte to program
Return Parameter
ACC = 00 if pass, !00 if fail
Sample routine:
;***** Program Device Data (DData) *****
;***** ACC holds data to write
;***** DPTR holds address of byte to write *****
;***** Returns with ACC = 00h if successful, else ACC NEQ 00h
WRData:
MOV
AUXR1,#20H
MOV
R0, #11
MOV
R1,#02H
MOV
A,Mydata
MOV
DPTR,Address
CALL
PGM_MTP
RET
;set the ENBOOT bit
;FOSC
;program data function
;data to write
;specify address of byte to read
;execute the function
ERASE BLOCK
Input Parameters:
R0 = osc freq (integer)
R0 = 0 (QUICK ERASE, Rx2 & 66x only)
R1 = 01h
R1 = 81h (WDT feed, Rx2 & 66x only; can only be used with Quick Erase)
DPH = block code as shown below:
block 0, 0k to 8k, 00H
block 1, 8k to 16k, 20H
block 2, 16k to 32k, 40H
block 3, 32k to 48k, 80H
block 4, 48k to 64k, C0H
DPL = 00h
Return Parameter
none
Sample routine:
;***** Erase Code Memory Block *****
;***** DPH (7:5) indicates which of the 5 blocks to erase
;***** DPTR values for the blocks are:
;
0000h = block 0
;
2000h = block 1
;
4000h = block 2
;
8000h = block 3
;
C000h = block 4
ERSBLK:
MOV
MOV
MOV
MOV
CALL
RET
AUXR1,#20H
R0, #11
R1,#01H
DPTR,#BLk_NUM
PGM_MTP
;set the ENBOOT bit
;FOSC
;erase block
;specify which block
;execute the function
相關PDF資料
PDF描述
P89C668HBA 80C51 8-bit Flash microcontroller family 64KB ISP FLASH with 8KB RAM
P89C668HFA 80C51 8-bit Flash microcontroller family 64KB ISP FLASH with 8KB RAM
P89C668 80C51 8-bit Flash microcontroller family 64KB ISP FLASH with 8KB RAM
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相關代理商/技術參數(shù)
參數(shù)描述
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