ST72324J2-AUTO Ver la hoja de datos (PDF) - STMicroelectronics

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ST72324J2-AUTO

8-bit MCU for automotive, 3.8 to 5.5V operating range with 8 to 32 Kbyte Flash, 10-bit ADC, 4 timers, SPI, SCI

STMicroelectronics 

ST72324xx-Auto

3

Register and memory map

Register and memory map

As shown in Figure 4, the MCU is capable of addressing 64 Kbytes of memories and I/O

registers.

The available memory locations consist of 128 bytes of register locations, up to 1024 bytes

of RAM and up to 32 Kbytes of user program 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.

Caution: Never access memory locations marked as ‘Reserved’. Accessing a reserved area can

have unpredictable effects on the device.

) Figure 4. Memory map

uct(s 0000h

rod 007Fh

0080h

HW registers

(see Table 3)

P RAM

te (1024, 512 or 384 bytes)

le 047Fh

0480h

so 7FFFh

b 8000h

Reserved

Program memory

O FFDFh

(32, 16 or 8 Kbytes)

- FFE0h Interrupt and reset vectors

t(s) FFFFh

(see Table 25)

0080h

00FFh

0100h

01FFh

0200h

027Fh

or 047Fh

Short addressing

RAM (zero page)

256 bytes stack

16-bit addressing

RAM

8000h

32 Kbytes

C000h

16 Kbytes

E000h

8 Kbytes

FFFFh

roduc Table 3. Hardware register map

P Address Block Register label

Register name

te 0000h

le 0001h

o 0002h

bs0003h

O 0004h

Port A(1)

Port B(1)

PADR

PADDR

PAOR

PBDR

PBDDR

Port A data register

Port A data direction register

Port A option register

Port B data register

Port B data direction register

Reset status Remarks

00h(2)

00h

00h

00h(2)

00h

R/W

R/W

R/W

R/W

R/W

0005h

PBOR

Port B option register

00h

R/W

0006h

0007h

0008h

Port C

PCDR

PCDDR

PCOR

Port C data register

Port C data direction register

Port C option register

00h(2)

00h

00h

R/W

R/W

R/W

0009h

000Ah

000Bh

Port D(1)

PDADR

PDDDR

PDOR

Port D data register

Port D data direction register

Port D option register

00h(2)

00h

00h

R/W

R/W

R/W

000Ch

000Dh

000Eh

Port E(1)

PEDR

PEDDR

PEOR

Port E data register

Port E data direction register

Port E option register

00h(2)

00h

00h

R/W

R/W(1)

R/W(1)

Doc ID 13841 Rev 1

19/193

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