ST72324J2-AUTO View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

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

5

Central processing unit (CPU)

Central processing unit (CPU)

5.1

Introduction

This CPU has a full 8-bit architecture and contains six internal registers allowing efficient 8-

bit data manipulation.

5.2

Main features

● Enable executing 63 basic instructions

Obsolete Product(s) - Obsolete Product(s) 5.3

● Fast 8-bit by 8-bit multiply

● 17 main addressing modes (with indirect addressing mode)

● Two 8-bit index registers

● 16-bit stack pointer

● Low power Halt and Wait modes

● Priority maskable hardware interrupts

● Non-maskable software/hardware interrupts

CPU registers

The six CPU registers shown in Figure 7 are not present in the memory mapping and are

accessed by specific instructions.

Figure 7. CPU registers

7

0

Reset value = XXh

7

0

Reset value = XXh

7

0

Reset value = XXh

15

PCH

87

PCL

0

Accumulator

X index register

Y index register

Reset value = reset vector @ FFFEh-FFFFh

Program counter

7

0

1 1 I1 H I0 N Z C

Reset value = 1 1 1 X 1 X X X

Condition code register

15

87

0

Reset value = stack higher address

Stack pointer

X = undefined value

Doc ID 13841 Rev 1

27/193

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