P89C51RB2BA datasheet(47/52 Pages) PHILIPS

Part #	P89C51RB2BA

Description	80C51 8-bit Flash microcontroller family 16KB/32KB/64KB ISP/IAP Flash with 512B/512B/1KB RAM

PDF	52 Pages

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Manufacturer	PHILIPS [NXP Semiconductors]

Direct Link	http://www.nxp.com

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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

Security

The security feature protects against software piracy and prevents

the contents of the Flash from being read. The Security Lock bits

are located in Flash. The 89C51RB2/RC2/RD2 has 3 programmable

security lock bits that will provide different levels of protection for the

on-chip code and data (see Table 10).

Table 10.

SECURITY LOCK BITS1

PROTECTION DESCRIPTION

LB1

LB2

LB3

PROTECTION DESCRIPTION

MOVC instructions executed from external program memory are disabled from fetching code bytes

from internal memory.

Block erase is disabled. Erase or programming of the status byte or boot vector is disabled.

Verify of code memory is disabled.

External execution is disabled.

NOTE:

1. Security bits are independent of each other. Full-chip erase may be performed regardless of the state of the security bits.

P89C51RB2BA Datasheet(PDF) 47 Page - NXP Semiconductors