STC89LE53RC datasheet(23/165 Pages) STC

Teilenummer	STC89LE53RC

Bauteilbeschribung	Enhanced 80C51 Central Processing Unit ,6T or 12T per machine cycle

PDF	165 Pages

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Hersteller	STC [STCmicro Technology Co,.Ltd]

Direct Link	http://www.stcmicro.com/

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3.2.4 Special Function Register for RAM

Some SFRs related to RAM are shown as follow.

For fast data movement, STC89xx series support two data pointers. They share the same SFR address and are

switched by the register bit – DPS/AUXR1.0.

Special Function

Registers (SFRs)

Low 128 Bytes

Internal RAM

FFFF

0000

64K Bytes

External RAM

High 128 Bytes

Internal RAM

On-chip Scratch-Pad RAM

1024 Bytes

expanded RAM

03FF

0000

Auxiliary RAM

Bank 0

bit Addressable

07H

0FH

17H

1FH

00H

08H

10H

18H

20H

30H

2FH

7FH

Lower 128 Bytes of internal SRAM

PSW register

bit

B7B6B5B4B3B2B1B0

name

RS1

RS0

CY : Carry flag.

AC : Auxilliary Carry Flag.(For BCD operations)

F0 : Flag 0.(Available to the user for general purposes)

RS1: Register bank select control bit 1.

RS0: Register bank select control bit 0.

OV : Overflow flag.

F1 : Flag 1. User-defined flag.

: Parity flag.

STC89LE53RC Datenblatt(PDF) 23 Page - STCmicro Technology Co,.Ltd

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