ZUSBOPTSC01ZACG datasheet(180/282 Pages) ZILOG

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PS022827-1212

P R E L I M I N A R Y

Flash Option Bit Address Space

Z8 Encore! XP® F082A Series

Product Specification

163

[5:4]



OSC_SEL[1:0]

Oscillator Mode Selection

00 = On-chip oscillator configured for use with external RC networks (<4MHz).

01 = Minimum power for use with very low frequency crystals (32kHz to 1.0MHz).

10 = Medium power for use with medium frequency crystals or ceramic resonators

(0.5MHz to 5.0MHz).

11 = Maximum power for use with high frequency crystals (5.0MHz to 20.0MHz). This

setting is the default for unprogrammed (erased) Flash.

[3]



VBO_AO

Voltage Brown-Out Protection Always On

0 = Voltage Brown-Out Protection can be disabled in STOP Mode to reduce total power

consumption. For the block to be disabled, the power control register bit must also be

written (see the Power Control Register Definitions section on page 33).

1 = Voltage Brown-Out Protection is always enabled including during STOP Mode. This

setting is the default for unprogrammed (erased) Flash.

[2]



FRP

Flash Read Protect

0 = User program code is inaccessible. Limited control features are available through the

On-Chip Debugger.

1 = User program code is accessible. All On-Chip Debugger commands are enabled.

This setting is the default for unprogrammed (erased) Flash.

[1]

Reserved

This bit is reserved and must be programmed to 1.

[0]



FWP

Flash Write Protect

This Option Bit provides Flash Program Memory protection:

0 = Programming and erasure disabled for all of Flash Program Memory. Programming,

Page Erase and Mass Erase through User Code is disabled. Mass Erase is available

using the On-Chip Debugger.

1 = Programming, Page Erase and Mass Erase are enabled for all of Flash program

memory.

Bit

Description (Continued)

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