UPSD3212A(2009) Ver la hoja de datos (PDF) - STMicroelectronics

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UPSD3212A
(Rev.:2009)

Flash programmable system devices with 8032 MCU and USB and programmable logic

STMicroelectronics 

UPSD3212A, UPSD3212C, UPSD3212CV

Architecture overview

Figure 5. 8032 MCU registers

PCH

DPTR(DPH)

A

B

SP

PCL

PSW

R0-R7

DPTR(DPL)

Accumulator

B Register

Stack Pointer

Program Counter

Program Status Word

General Purpose

Register (Bank0-3)

Data Pointer Register

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2.2.1

Accumulator

The Accumulator is the 8-bit general purpose register, used for data operation such as

transfer, temporary saving, and conditional tests. The Accumulator can be used as a 16-bit

register with B Register as shown below.

Figure 6. Configuration of BA 16-bit registers

B

B

A

A

Two 8-bit Registers can be used as a "BA" 16-bit Registers

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2.2.2

2.2.3

B register

The B Register is the 8-bit general purpose register, used for an arithmetic operation such

as multiply, division with Accumulator.

Stack pointer

The Stack Pointer Register is 8 bits wide. It is incremented before data is stored during

PUSH and CALL executions. While the stack may reside anywhere in on-chip RAM, the

Stack Pointer is initialized to 07h after reset. This causes the stack to begin at location 08h.

Figure 7. Stack pointer

Stack Area (30h-FFh)

Bit 15

Bit 8 Bit 7

Bit 0

00h

SP

Hardware Fixed

00h-FFh

SP (Stack Pointer) could be in 00h-FFh

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