MC68HC908AZ60A — Rev 2.0 Technical Data

MOTOROLA EEPROM-2 Memory 109

Technical Data — MC68HC908AZ60A

Section 7. EEPROM-2 Memory

7.1 Contents

7.2 Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .110

7.3 Features. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .110

7.4 EEPROM-2 Register Summary . . . . . . . . . . . . . . . . . . . . . .111

7.5 Functional Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . .112

7.5.1 EEPROM-2 Configuration . . . . . . . . . . . . . . . . . . . . . . . .112

7.5.2 EEPROM-2 Timebase Requirements . . . . . . . . . . . . . . .112

7.5.3 EEPROM-2 Program/Erase Protection . . . . . . . . . . . . . .113

7.5.4 EEPROM-2 Block Protection . . . . . . . . . . . . . . . . . . . . . .114

7.5.5 EEPROM-2 Programming and Erasing. . . . . . . . . . . . . .114

7.6 EEPROM-2 Register Descriptions. . . . . . . . . . . . . . . . . . . .119

7.6.1 EEPROM-2 Control Register . . . . . . . . . . . . . . . . . . . . . .119

7.6.2 EEPROM-2 Array Configuration Register . . . . . . . . . . .121

7.6.3 EEPROM-2 Nonvolatile Register. . . . . . . . . . . . . . . . . . .123

7.6.4 EEPROM-2 Timebase Divider Register . . . . . . . . . . . . .126

7.6.5 EEPROM-2 Timebase Divider Non-Volatile Register . .126

7.7 Low-Power Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .127

7.7.1 Wait Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .127

7.7.2 Stop Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .127

EEPROM-2 Memory

Technical Data MC68HC908AZ60A — Rev 2.0

110 EEPROM-2 Memory MOTOROLA

7.2 Introduction

This section describes the 512 bytes of electrically erasable

programmable read-only memory (EEPROM) residing at address range

$0600 to $07FF. There are 1024 bytes of EEPROM available on the

MC68HC908AS60A and MC68HC908AZ60A which are physically

located in two 512 byte arrays. For information relating to the array

covering address range $0800 to $09FF please see EEPROM-1

Memory on page 89.

7.3 Features

Features of the EEPROM-2 include the following:

• 512 bytes Non-Volatile Memory

• Byte, Block, or Bulk Erasable

• Non-Volatile EEPROM Configuration and Block Protection

Options

• On-chip Charge Pump for Programming/Erasing

• Security Option

• AUTO Bit Driven Programming/Erasing Time Feature

EEPROM-2 Memory

EEPROM-2 Register Summary

MC68HC908AZ60A — Rev 2.0 Technical Data

MOTOROLA EEPROM-2 Memory 111

7.4 EEPROM-2 Register Summary

The EEPROM-2 Register Summary is shown in Figure 7-1.

Addr.Register Name Bit 7654321Bit 0

$FF70

EE2DIV Non-volatile

(EE2DIVHNVR)*

Read:

EEDIVSECD

RRRREEDIV10EEDIV9EEDIV8

Write:

Reset: Unaffected by reset; $FF when blank

$FF71

EE2DIV Non-volatile

(EE2DIVLNVR)*

Read:

EEDIV7 EEDIV6 EEDIV5 EEDIV4 EEDIV3 EEDIV2 EEDIV1 EEDIV0

Write:

Reset: Unaffected by reset; $FF when blank

$FF7A

EE2 Divider Register High

(EE2DIVH)

Read:

EEDIVSECD

0000

EEDIV10 EEDIV9 EEDIV8

Write:

Reset: Contents of EE2DIVHNVR ($FF70); Bits[6:3] = 0

$FF7B

EE2 Divider Register Low

(EE2DIVL)

Read:

EEDIV7 EEDIV6 EEDIV5 EEDIV4 EEDIV3 EEDIV2 EEDIV1 EEDIV0

Write:

Reset: Contents of EE2DIVLNVR ($FF71)

$FF7C

EEPROM-2 Non-volatile

(EE2NVR)*

Read:

UNUSED UNUSED UNUSED EEPRTCT EEBP3 EEBP2 EEBP1 EEBP0

Write:

Reset: Unaffected by reset; $FF when blank; factory programmed $F0

$FF7D

EEPROM-2 Control

(EE2CR)

Read:

UNUSED

EEOFF EERAS1 EERAS0 EELAT AUTO EEPGM

Write:

Reset:00000000

$FF7F

EEPROM-2 Array

Configuration Register

(EE2ACR)

Read: UNUSED UNUSED UNUSED EEPRTCT EEBP3 EEBP2 EEBP1 EEBP0

Write:

Reset: Contents of EE2NVR ($FF7C)

* Non-volatile EEPROM register; write by programming.

= Unimplemented R = Reserved UNUSED = Unused

Figure 7-1. EEPROM-2 Register Summary

Part #	8A/S6
Description	Incandescent S Light Lamp
Category	LAMP
Availability	In Stock
Qty	2

8A/S6

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