68HC05SB7 datasheet(21/170 Pages) FREESCALE

No. de pieza	68HC05SB7

Descripción Electrónicos	SPECIFICATION (General Release)

PDF	170 Pages

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Fabricante Electrónico	FREESCALE [Freescale Semiconductor, Inc]

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21 / 170 page

August 27, 1998

GENERAL RELEASE SPECIFICATION

MC68HC05SB7

MEMORY

MOTOROLA

REV 2.1

2-1

SECTION 2

MEMORY

This section describes the organization of the MC68HC05SB7 on-chip memory.

2.1

MEMORY MAP

In Normal operating mode, the 48 bytes of I/O, 224 bytes of user RAM and 6144

bytes of user ROM are all active as shown in Figure 2-1. The ROM portion of

memory holds the program instructions, ﬁxed data, user deﬁned vectors, and

interrupt service routines. The RAM portion of memory holds variable data. I/O

registers are memory mapped so that the CPU can access their locations in the

same way that it accesses all other memory locations.

$0000

I/O REGISTERS

48 BYTES

$002F

$0030

UNIMPLEMENTED

16 BYTES

$003F

$0040

USER RAM

224 BYTES

STACK RAM

64 BYTES

$00C0

$011F

$00FF

$0120

UNIMPLEMENTED

1248 BYTES

$05FF

$0600

USER ROM

6144 BYTES

$1DFF

$1E00

INTERNAL TEST ROM

496 BYTES

$1FEF

$1FF0

USER VECTORS

16 BYTES

$1FFF

Figure 2-1. MC68HC05SB7 Memory Map

68HC05SB7 Datasheet(PDF) 21 Page - Freescale Semiconductor, Inc

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