P89C61X2 查看數據表（PDF） - Philips Electronics

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P89C61X2

80C51 8-bit Flash microcontroller family 64KB Flash, 512B/1024B RAM

Philips Electronics 

Philips Semiconductors

80C51 8-bit Flash microcontroller family

64KB Flash, 512B/1024B RAM

Product data

P89C60X2/61X2

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 P89C60X2/61X2 has 3 programmable security lock bits that will provide different levels of protection for the on-chip code

and data (see Table 3). Unlike the ROM and OTP versions, the security lock bits are independent. LB3 includes the security protection of LB1.

Table 3.

SECURITY LOCK BITS1

Level

PROTECTION DESCRIPTION

LB1

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

internal memory.

LB2

Program verification is disabled

LB3

External execution is disabled.

NOTE:

1. The security lock bits are independent.

2003 Sep 11

18

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