HC05RC16GRSSLASHD datasheet(30/122 Pages) NXP

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Memory

General Release Specification

MC68HC05RC16 — Rev. 3.0

Memory

2.3.1 ROM

The user ROM consists of 15,920 bytes of ROM located from $0180 to

$3FAF and 16 bytes of user vectors located from $3FF0 to $3FFF.

The burn-in ROM is located from $3FB0 to $3FEF.

Ten of the user vectors, $3FF6–$3FFF, are dedicated to reset and

interrupt vectors. The six remaining locations — $3FF0, $3FF1, $3FF2,

$3FF3, $3FF4, and $3FF5 — are general-purpose user ROM locations.

2.3.2 ROM Security

Security has been incorporated into the MC68HC05RC16 to prevent

external viewing of the ROM contents. This feature ensures that

customer-developed software remains proprietary.1

1. No security feature is absolutely secure. However, Motorola’s strategy is to make reading or

copying the ROM difficult for unauthorized users.

$001A

Reserved

RRRRRRR

$001B

Reserved

RRRRRRR

$001C

Reserved

RRRRRRR

$001D

Reserved

RRRRRRR

$001E

Reserved

RRRRRRR

$001F

Reserved

RRRRRRR

= Reserved

Addr.

Bit 7

Bit 0

Figure 2-2. I/O Registers (Continued)

Freescale Semiconductor, Inc.

For More Information On This Product,

Go to: www.freescale.com

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