M68HC08 datasheet(59/332 Pages) FREESCALE

59 / 332 page

MC68HC908JB16 — Rev. 1.1

Technical Data

Freescale Semiconductor

FLASH Memory

Technical Data — MC68HC908JB16

Section 4. FLASH Memory

4.1 Contents

4.2

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59

4.3

Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60

4.4

FLASH Control Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61

4.5

FLASH Block Erase Operation . . . . . . . . . . . . . . . . . . . . . . . . . 62

4.6

FLASH Mass Erase Operation . . . . . . . . . . . . . . . . . . . . . . . . . 63

4.7

FLASH Program Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . 64

4.8

FLASH Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66

4.8.1

FLASH Block Protect Register . . . . . . . . . . . . . . . . . . . . . . . 66

4.9

ROM-Resident Routines. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67

4.9.1

Variables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68

4.9.2

ERASE Routine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68

4.9.3

PROGRAM Routine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69

4.9.4

VERIFY Routine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69

4.2 Introduction

This section describes the operation of the embedded FLASH memory.

This memory can be read, programmed, and erased from a single

external supply. The program and erase operations are enabled through

the use of an internal charge pump.

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