P89C51RB2BA datasheet(43/52 Pages) PHILIPS

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Philips Semiconductors

Preliminary specification

89C51RB2/89C51RC2/

89C51RD2

80C51 8-bit Flash microcontroller family

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

1999 Sep 23

RECORD TYPE

COMMAND/DATA FUNCTION

Miscellaneous Write Functions

:nnxxxx03ffssddcc

Where:

= number of bytes (hex) in record

xxxx

= required field, but value is a “don’t care”

= Write Function

= subfunction code

= selection code

= data input (as needed)

= checksum

Subfunction Code = 01 (Erase Blocks)

ff = 01

ss = 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

Example:

:0200000301C03A

erase block 4

Subfunction Code = 04 (Erase Boot Vector and Status Byte)

ff = 04

ss = don’t care

dd = don’t care

Example:

:020000030400F7

erase boot vector and status byte

Subfunction Code = 05 (Program Security Bits)

ff = 05

ss = 00 program security bit 1

(inhibit writing to Flash)

01 program security bit 2

(inhibit Flash verify)

02 program security bit 3

(disable eternal memory)

Example:

:020000030501F5

program security bit 2

Subfunction Code = 06 (Program Status Byte or Boot Vector)

ff = 06

ss = 00 program status byte

01 program boot vector

Example:

:030000030601FCF7

program boot vector with 0FCH

Subfunction Code = 07 (Full Chip Erase)

Erases all blocks, security bits, and sets status and boot vector to default values

ff = 07

ss = don’t care

dd = don’t care

Example:

:0100000307F5 full chip erase

Display Device Data or Blank Check – Record type 04 causes the contents of the entire Flash array to be sent out

the serial port in a formatted display. This display consists of an address and the contents of 16 bytes starting with that

address. No display of the device contents will occur if security bit 2 has been programmed. The dumping of the device

data to the serial port is terminated by the reception of any character.

General Format of Function 04

:05xxxx04sssseeeeffcc

Where:

= number of bytes (hex) in record

xxxx

= required field, but value is a “don’t care”

= “Display Device Data or Blank Check” function code

ssss

= starting address

eeee

= ending address

= subfunction

00 = display data

01 = blank check

= checksum

Example:

:0500000440004FFF0069

display 4000–4FFF

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