68HC05JB3 datasheet(21/134 Pages) FREESCALE

21 / 134 page

November 5, 1998

GENERAL RELEASE SPECIFICATION

MC68HC05JB3

MEMORY

MOTOROLA

REV 1

2-1

SECTION 2

MEMORY

The MC68HC05JB3 has 8k-bytes of addressable memory, with 64 bytes of I/O,

144 bytes of user RAM, and 2560 bytes of user ROM, as shown in Figure 2-1.

Figure 2-1. MC68HC05JB3 Memory Map

$1FF7

$1FF8

$1FF9

$1FFA

$1FFB

$1FFC

$1FFD

$1FFE

$1FFF

$003F

$0000

$1FF6

$1FF3

$1FF4

$1FF5

$1FF2

$1FF1

Reserved

USB Vector (Low Byte)

Timer1 Vector (Low Byte)

USB Vector (High Byte)

Timer1 Vector (High Byte)

MFT Vector (Low Byte)

MFT Vector (High Byte)

Reserved

$1FF0

Reserved

IRQ Vector (High Byte)

IRQ Vector (Low Byte)

SWI Vector (High Byte)

SWI Vector (Low Byte)

Reset Vector (High Byte)

Reset Vector (Low Byte)

I/O Registers

64 Bytes

I/O Registers

64 Bytes

$0000

$003F

$0040

$006F

Unused

48 Bytes

User RAM

144 Bytes

64 Byte Stack

$0070

$00C0

$00FF

$0100

$13FF

Unused

4864 Bytes

$1400

$1DFF

$1E00

$1FEF

User ROM

2560 Bytes

Self-Check ROM

496 Bytes

User Vectors

16 Bytes

$1FF0

$1FFF

Freescale Semiconductor, Inc.

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