SM39R2051W20 参数 Datasheet PDF下载

SM39R4051/SM39R2051

8-Bit Micro-controller

4KB/2KB with ISP Flash

& 256B RAM embedded

Special Function Register (SFR)

A map of the Special Function Registers is shown as below:

Hex\Bin

F8

F0

E8

E0

D8

D0

C8

C0

B8

B0

A8

A0

98

90

88

80

Hex\Bin

X000

IICS

B

P4

ACC

PSW

IRCON

IEN1

P3

IEN0

S0CON

P1

TCON

X000

IP0

S0BUF

AUX

TMOD

SP

X001

TL0

DPL

X010

TL1

DPH

X011

TH0

DPL1

X100

TH1

DPH1

X101

CKCON

X110

IFCON

PCON

X111

S0RELL

P1WE

P3WE

ISPFAH

ISPFAL

P3M0

ISPFD

P3M1

ISPFC

P4M0

P1M0

LVC

P4M1

P1M1

X001

IICCTL

X010

IICA1

X011

IICA2

X100

IICRWD

X101

IICEBT

X110

X111

TAKEY

SWRES

Bin/Hex

FF

F7

EF

E7

DF

D7

CF

C7

BF

WDTC

WDTK

B7

AF

A7

9F

97

8F

87

Bin/Hex

IP1

S0RELH

Note: Special Function Registers reset values and description for SM39R4051

Register

SP

DPL

DPH

DPL1

DPH1

PCON

TCON

TMOD

TL0

TL1

TH0

TH1

CKCON

IFCON

P1

AUX

Location

81h

82h

83h

84h

85h

87h

88h

89h

8Ah

8Bh

8Ch

8Dh

8Eh

8Fh

90h

91h

Reset value

07h

00h

00h

00h

00h

40h

00h

00h

00h

00h

00h

00h

10h

40h

FFh

00h

Description

Stack Pointer

Data Pointer 0 low byte

Data Pointer 0 high byte

Data Pointer 1 low byte

Data Pointer 1 high byte

Power Control

Timer/Counter Control

Timer Mode Control

Timer 0, low byte

Timer 1, low byte

Timer 0, high byte

Timer 1, high byte

Clock control register

Interface control register

Port 1

Auxiliary register

Specifications subject to change without notice contact your sales representatives for the most recent information.

ISSFD-M055

7

Ver.E SM39R4051 09/2011