P89C51RC2BASLASH01 datasheet(51/68 Pages) PHILIPS

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Philips Semiconductors

Preliminary data

P89C51RA2/RB2/RC2/RD2xx

80C51 8-bit Flash microcontroller family

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

2002 Jul 18

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 10.

Using the Watchdog Timer (WDT)

The P89C51Rx2 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 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 running.

Table 10.

IAP calls

IAP CALL

PARAMETER

PROGRAM BYTE

Input Parameter:

R0 = osc freq (integer)

R1 = 02h or R1= 82h (WDT feed)

DPTR = address of byte to program

ACC = byte to program

Return Parameter:

ACC = 00 if pass, !=00 if fail

ERASE 4K CODE BLOCK

(New function)

Input Parameter:

R0 = osc freq (integer)

R1 = 0Ch or R1 = 8Ch (WDT feed)

DPH = address of 4k code block

DPH = 00H , 4k block 0,

0k~4k

DPH = 10H , 4k block 1,

4k~8k

DPH = 20H , 4k block 2,

8k~12k

DPH = 30H , 4k block 3,

12k~16k

DPH = 40H , 4k block 4,

16k~20k

DPH = 50H , 4k block 5,

20k~24k

DPH = 60H , 4k block 6,

24k~28k

DPH = 70H , 4k block 7,

28k~32k

DPH = 80H , 4k block 8,

32k~36k

DPH = 90H , 4k block 9,

36k~40k

DPH = A0H , 4k block 10, 40k~44k

DPH = B0H , 4k block 11, 44k~48k

DPH = C0H , 4k block 12, 48k~52k

DPH = D0H , 4k block 13, 52k~56k

DPH = E0H , 4k block 14, 56k~60k

DPH = F0H , 4k block 15, 60k~64k

DPL = 00h

Return Parameter:

ACC = 00 if pass, !=00 if fail

ERASE 8K / 16K CODE

BLOCK

Input Parameter:

R0 = osc freq (integer)

R1 = 01h or R1 = 81h (WDT feed)

DPH = address of code block

DPH = 00H , block 0 , 0k~8k

DPH = 20H , block 1 , 8k~16k

DPH = 40H , block 2 , 16~32k

DPH = 80H , block 3 , 32k~48k

DPH = C0H , block 4 , 48k~64k

DPL = 00h

Return Parameter:

ACC = 00 if pass , !=0 if fail

ERASE STATUS BYTE &

BOOT VECTOR

Input Parameter:

R0 = osc freq (integer)

R1 = 04h or R1 = 84h (WDT feed)

DPH = 00h

DPL = don’t care

Return Parameter:

ACC = 00 if pass , !=0 if fail

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