MC68HC908AP16CFB datasheet(57/440 Pages) MOTOROLA

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FLASH Memory

FLASH Control Register

MC68HC908AP Family — Rev. 2.5

Data Sheet

MOTOROLA

4.3 FLASH Control Register

The FLASH control register (FLCR) controls FLASH program and erase

operation.

HVEN — High Voltage Enable Bit

This read/write bit enables the charge pump to drive high voltages for

program and erase operations in the array. HVEN can only be set if

either PGM = 1 or ERASE = 1 and the proper sequence for program

or erase is followed.

1 = High voltage enabled to array and charge pump on

0 = High voltage disabled to array and charge pump off

MASS — Mass Erase Control Bit

This read/write bit configures the memory for mass erase operation or

page erase operation when the ERASE bit is set.

1 = Mass erase operation selected

0 = Page erase operation selected

ERASE — Erase Control Bit

This read/write bit configures the memory for erase operation.

ERASE is interlocked with the PGM bit such that both bits cannot be

equal to 1 or set to 1 at the same time.

1 = Erase operation selected

0 = Erase operation not selected

PGM — Program Control Bit

This read/write bit configures the memory for program operation.

PGM is interlocked with the ERASE bit such that both bits cannot be

equal to 1 or set to 1 at the same time.

1 = Program operation selected

0 = Program operation not selected

Address:

$FE08

Bit 7

654321

Bit 0

Read:

0000

HVEN

MASS

ERASE

PGM

Write:

Reset:

00000000

Figure 4-2. FLASH Control Register (FLCR)

Freescale Semiconductor, Inc.

For More Information On This Product,

Go to: www.freescale.com

MC68HC908AP16CFB Datasheet(PDF) 57 Page - Motorola, Inc

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