Z8F082ASH020SC datasheet(160/244 Pages) ZILOG

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PS024705-0405

P R E L I M I N A R Y

Flash Option Bits

Z8 Encore! XP® F08xA Series

Product Specification

142

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 Mem-

ory.

Flash Program Memory Address 0001H

Reserved—Must be 1.

XTLDIS—State of Crystal Oscillator at Reset

This bit only enables the crystal oscillator, its selection as system clock must be done man-

ually.

0 = Crystal oscillator is enabled during reset, resulting in longer reset timing

1 = Crystal oscillator is disabled during reset, resulting in shorter reset timing

Trim Bit Address Space

Trim Bit Address 0000H

Table 88. Flash Options Bits at Program Memory Address 0001H

BITS

FIELD

Reserved

XTLDIS

Reserved

RESET

UUU

R/W

R/WR/W

ADDR

Program Memory 0001H

Note: U = Unchanged by Reset. R/W = Read/Write.

Table 89. Trim Options Bits at Address 0000H (TTEMP0)

BITS

FIELD

TS_FINE

Reserved

TS_ULTRAFINE

RESET

UUU

R/W

R/WR/W

ADDR

Information Page Memory 0020H

Note: U = Unchanged by Reset. R/W = Read/Write.

Note:

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