68HC705JB4 datasheet(21/134 Pages) FREESCALE

21 / 134 page

February 24, 1999

GENERAL RELEASE SPECIFICATION

MC68HC05JB4

MEMORY

MOTOROLA

REV 2

2-1

SECTION 2

MEMORY

The MC68HC05JB4 has 8k-bytes of addressable memory, with 64 bytes of I/O,

176 bytes of user RAM, and 3584 bytes of user ROM, as shown in Figure 2-1.

Figure 2-1. MC68HC05JB4 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/IRQ2 Vector (High Byte)

IRQ/IRQ2 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

$007F

Unused

64 Bytes

User RAM

176 Bytes

64 Byte Stack

$0080

$00C0

$00FF

$012F

$0130

$0FFF

Unused

3792 Bytes

$1000

$1DFF

$1E00

$1FEF

User ROM

3584 Bytes

Self-Check ROM

496 Bytes

User Vectors

16 Bytes

$1FF0

$1FFF

Freescale Semiconductor, Inc.

For More Information On This Product,

Go to: www.freescale.com

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