MC80F0424 Datasheet, PDF(117/135 Page) List of Unclassifed Manufacturers

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MC80F0424 Datasheet, PDF (117/135 Pages) List of Unclassifed Manufacturers – 8-BIT SINGLE-CHIP MICROCONTROLLERS

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Preliminary

MC80F0424/0432/0448

25. FLASH PROGRAMMING

The Device Configuration Area can be programmed or left un-

programmed to select device configuration such as security bit.

This area is not accessible during normal execution but is reada-

ble and writable during FLASH program / verify mode. The De-

vice Configuration Area register is located at the address 20FFH.

CONFIG

- PFS1 PFS0 LOCK

ADDRESS: 20FFH

INITIAL VALUE: 00H

Code Protect (Available FLASH version)

0 : Lock Disable

1 : Lock Enable (main cell read protection)

PFD Level Selection

00: PFD = 2.7V

01: PFD = 2.7V

10: PFD = 3.0V

11: PFD = 2.4V

Figure 25-1 Device Configuration Area Register

25.1 Lock bit

The lock bit exists in Device Configuration Area register. If lock

bit is programmed and user tries to read FLASH memory cell, the

output data from the data port is 5AH that means the normal pro-

tection operation of user program data. Once the lock bit is pro-

grammed, the user canât modify and read the data of user program

area.

25.2 Power Fail Detection level

The power fail detection provides 3 level of detection, 2.4V, 2.7V

and 3.0V. The default level of detection is 2.7V and this level is

applied if user does not select the specific level in FLASH pro-

gramming S/W tools. For more information, refer to "24. POW-

ER FAIL PROCESSOR" on page 111

MAR. 2005 Ver 0.2

113

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