xxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxx x x x xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxx xx xx

xxxxx xxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxx xxxxxx xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxx x x

xxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxx xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxx

xxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxx xxx

P1M2

Port 1 output mode 2

92H

(P1M2.7) (P1M2.6)

-

(P1M2.4) (P1M2.3) (P1M2.2) (P1M2.1) (P1M2.0) 00[1]

00x0xx00

P3M1

Port 3 output mode 1

B1H

-

-

-

-

-

-

(P3M1.1) (P3M1.0) 03[1]

xxxxxx11

P3M2

Port 3 output mode 2

B2H

-

-

-

-

-

-

(P3M2.1) (P3M2.0) 00[1]

xxxxxx00

PCON

Power control register

87H

SMOD1

SMOD0

BOPD

BOI

GF1

GF0

PMOD1

PMOD0

00

00000000

PCONA

Power control register A

B5H

RTCPD

-

VCPD

-

I2PD

-

SPD

-

00[1]

00000000

Bit address

D7

D6

D5

D4

D3

D2

D1

D0

PSW*

Program status word

D0H

CY

AC

F0

RS1

RS0

OV

F1

P

00H

00000000

PT0AD

Port 0 digital input disable

F6H

-

-

PT0AD.5

PT0AD.4

PT0AD.3

PT0AD.2

PT0AD.1

-

00H

xx00000x

RSTSRC

Reset source register

DFH

-

-

BOF

POF

R_BK

R_WD

R_SF

R_EX

[3]

RTCCON

Real-time clock control

D1H

RTCF

RTCS1

RTCS0

-

-

-

ERTC

RTCEN

60[1][6]

RTCH

Real-time clock register

HIGH

D2H

00[6]

00000000

RTCL

Real-time clock register LOW

D3H

00[6]

00000000

SADDR

Serial port address register

A9H

00

00000000

SADEN

Serial port address enable

B9H

00

00000000

SBUF

Serial Port data buffer

register

99H

xx

xxxxxxxx

Bit address

9F

9E

9D

9C

9B

9A

99

98

SCON*

Serial port control

98H

SM0/FE

SM1

SM2

REN

TB8

RB8

TI

RI

00

00000000

SSTAT

Serial port extended status

register

BAH

DBMOD

INTLO

CIDIS

DBISEL

FE

BR

OE

STINT

00

00000000

SP

Stack pointer

81H

07

00000111

TAMOD

Timer 0 and 1 auxiliary mode

8FH

-

-

-

T1M2

-

-

-

T0M2

00

xxx0xxx0

Bit address

8F

8E

8D

8C

8B

8A

89

88

TCON*

Timer 0 and 1 control

88H

TF1

TR1

TF0

TR0

IE1

IT1

IE0

IT0

00

00000000

TH0

Timer 0 HIGH

8CH

00

00000000

TH1

Timer 1 HIGH

8DH

00

00000000

TL0

Timer 0 LOW

8AH

00

00000000

TL1

Timer 1 LOW

8BH

00

00000000

TMOD

Timer 0 and 1 mode

89H

T1GATE

T1C/T

T1M1

T1M0

T0GATE

T0C/T

T0M1

T0M0

00

00000000

Table 4:

* indicates SFRs that are bit addressable.

Name

Description

SFR

addr.

Bit functions and addresses

Reset value

MSB

LSB

Hex

Binary