MC9S08DZ96F2CLL datasheet(67/458 Pages) FREESCALE

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Chapter 4 Memory

MC9S08DZ128 Series Data Sheet, Rev. 1

Freescale Semiconductor

4.6

FLASH and EEPROM

MC9S08DZ128 Series devices include FLASH and EEPROM memory intended primarily for program

and data storage. In-circuit programming allows the operating program and data to be loaded into FLASH

and EEPROM, respectively, after ﬁnal assembly of the application product. It is possible to program the

arrays through the single-wire background debug interface. Because no special voltages are needed for

erase and programming operations, in-application programming is also possible through other

software-controlled communication paths. For a more detailed discussion of in-circuit and in-application

programming, refer to the HCS08 Family Reference Manual, Volume I, Freescale Semiconductor

document order number HCS08RMv1.

4.6.1

Features

Features of the FLASH and EEPROM memory include:

•

Up to 128K of FLASH and up to 2K of EEPROM (see Table 1-1 for exact array sizes)

•

FLASH sector size: 512 bytes

•

EEPROM sector size: selectable 4-byte or 8-byte sector mapping operation

•

Single power supply program and erase

•

Command interface for fast program and erase operation

•

Up to 100,000 program/erase cycles at typical voltage and temperature

•

Flexible block protection

•

Security feature for FLASH, EEPROM, and RAM

•

Burst programming capability

•

Sector erase abort

4.6.2

Program and Erase Times

Before any program or erase command can be accepted, the FLASH and EEPROM clock divider register

(FCDIV) must be written to set the internal clock for the FLASH and EEPROM module to a frequency

(fFCLK) between 150 kHz and 200 kHz (see Section 4.6.11.1, “FLASH and EEPROM Clock Divider

reset initialization. The user must ensure that FACCERR is not set before writing to the FCDIV register.

One period of the resulting clock (1/fFCLK) is used by the command processor to time program and erase

pulses. An integer number of these timing pulses is used by the command processor to complete a program

or erase command.

NOTE

When changing from a low power mode (Stop2 mode or bus frequency less

than 150kHz) into an operating condition that allows program or erase, it is

necessary to wait at least 10

μs before starting a program or erase command.

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