ZUSBOPTSC01ZAC datasheet(239/402 Pages) ZILOG

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PS024604-1005

P R E L I M I N A R Y

Flash Control Register

Z8FMC16100 Series Flash MCU

Product Specification

217

• The Flash Write Protect option bit is ignored

• The Flash Sector Protect Register is ignored for programming and erase operations

• Programming operations are not limited to the page selected in the Page Select Register

• Bits in the Flash Sector Protect Register can be written to one or zero

• The second write of the Page Select Register to unlock the Flash Controller is not nec-

essary

• The Page Select Register can be written when the Flash Controller is unlocked

• The Mass Erase command is enabled through the Flash Control Register

• The page erase and programming operations are disabled if the Memory Read Protect

option is enabled

Flash Control Register

The Flash Control Register, shown in Table 116, unlocks the Flash Controller for pro-

gramming and erase operations, or to select the Flash Sector Protect Register.

The Write-Only Flash Control Register shares its Register File address with the Read-

Only Flash Status Register.

Table 116. Flash Control Register (FCTL)

BITS

FIELD

FCMD

RESET

00H

R/W

ADDR

FF8H

Bit

Position

Value

Description

[7:0]

FCMD

73H

8CH

95H

63H

5EH

Flash Command:

First unlock command.

Second unlock command.

Page erase command.

Mass erase command.

Flash Sector Protect register select.

All other commands, or any command out of sequence, locks the Flash

Controller.

ZUSBOPTSC01ZAC 数据表(PDF) 239 Page - Zilog, Inc.

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