MC68HC05L28 데이터 시트보기 (PDF) - Freescale Semiconductor

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MC68HC05L28

Microcontrollers

Freescale Semiconductor 

Freescale Semiconductor, Inc.

1

1.2

Mask options on the MC68HC05L28

There is only one mask option on the MC68HC05L28. This is to enable or disable the STOP

instruction. It is programmed during manufacture and must be specified on the order form.

1.2.1 Option register (OPT)

In addition to its mask option, the MC68HC05L28 also has two functions that are programmable

via an options register (OPT). This register can be written to once after a reset, but it can be read

at any time.

Option register (OPT)

Address bit 7

bit 6

bit 5

bit 4

bit 3

bit 2

bit 1

bit 0

State

on reset

$001D

IRQED COPON ???? ?100

IRQED — IRQ edge sensitivity

This bit selects the IRQ0 sensitivity.

1 (set) – The IRQ0 is edge-sensitive.

0 (clear) – The IRQ0 is edge-and-level-sensitive.

Reset clears this bit.

COPON — COP function enable/disable

1 (set) – This bit enables the COP watchdog.

0 (clear) – This bit disables the operation of the COP.

Reset clears this bit.

MC68HC05L28

INTRODUCTION

TPG

MOTOROLA

1-3

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