ST72589BW datasheet(8/158 Pages) STMICROELECTRONICS

8 / 158 page

ST72589BW, ST72389BW

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1.3 REGISTER & MEMORY MAP

As shown in the Figure 3, the MCU is capable of

addressing 64K bytes of memories and I/O regis-

ters.

The available memory locations consist of 128

bytes of register location, up to 1Kbyte of RAM, 60

bytes of LCD RAM and up to 24Kbytes of user pro-

gram memory. The RAM space includes up to 256

bytes for the stack from 0100h to 01FFh.

The highest address bytes contain the user reset

and interrupt vectors.

Figure 3. Memory Map

Table 2. Interrupt Vector Map

* available on ST72589 version only.

0000h

512 Bytes RAM

Program Memory

Interrupt & Reset Vectors

HW Registers

047Fh

0080h

Short Addressing

RAM (zero page)

Stack Area

256 Bytes

16-bit Addressing

RAM

007Fh

0480h

9FFFh

Reserved

0100h

01FFh

027Fh

0080h

(see Table 3)

A000h

FFDFh

FFE0h

FFFFh

(see Table 1)

LCD RAM

(60 Bytes)

04BBh

04BCh

0200h

00FFh

1024 Bytes RAM

or 047Fh

24 KBytes

Program Memory

16 KBytes

BFFFh

C000h

Vector Address

Description

Remarks

FFE0-FFE1h

FFE2-FFE3h

FFE4-FFE5h

FFE6-FFE7h

FFE8-FFE9h

FFEA-FFEBh

FFEC-FFEDh

FFEE-FFEFh

FFF0-FFF1h

FFF2-FFF3h

FFF4-FFF5h

FFF6-FFF7h

FFF8-FFF9h

FFFA-FFFBh

FFFC-FFFDh

FFFE-FFFFh

I2C interrupt vector*

SCI interrupt vector

TIMER B interrupt vector

TIMER A interrupt vector

SPI interrupt vector

CAN interrupt vector*

Not used

MCC interrupt vector

External interrupt vector (EI5: port D)

External interrupt vector (EI4: port C)

External interrupt vector (EI3: port B)

External interrupt vector (EI2: port A7..4)

External interrupt vector (EI1: port A3..0)

Non maskable external interrupt vector (NMI)

TRAP (software) interrupt vector

RESET vector

Internal Interrupt

External Interrupt

CPU Interrupt

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