HMS99C52 datasheet(17/43 Pages) HYNIX

17 / 43 page

HMS99C5X Series

Jan. 2003 Ver 1.0

Table 2. Special Function Registers - Functional Blocks

Block

Symbol

Name

Address

Contents

after Reset

CPU

ACC

DPH

DPL

PSW

Accumulator

B-Register

Data Pointer, High Byte

Data Pointer, Low Byte

Program Status Word Register

Stack Pointer

E0H 1)

F0H 1)

83H

82H

D0H 1)

81H

1) Bit-addressable Special Function register

00H

07H

Interrupt System

Interrupt Enable Register

Interrupt Priority Register

A8H 1)

B8H 1)

0X000000B 2)

XX000000B 2)

2) X means that the value is indeterminate and the location is reserved

Ports

Port 0

Port 1

Port 2

Port 3

80H 1)

90H 1)

A0H 1)

B0H 1)

FFH

Serial Channels

PCON 3)

SBUF

SCON

3) This special function register is listed repeatedly since some bit of it also belong to other functional blocks

Power Control Register

Serial Channel Buffer Reg.

Serial Channel 0 Control Reg.

87H

99H

98H 1)

0XXX0000B 2)

XXH 2)

00H

Timer 0/ Timer 1

TCON

TH0

TH1

TL0

TL1

TMOD

Timer 0/1 Control Register

Timer 0, High Byte

Timer 1, High Byte

Timer 0, Low Byte

Timer 1, Low Byte

Timer Mode Register

88H 1)

8CH

8DH

8AH

8BH

89H

00H

Timer 2

T2CON

T2MOD

RC2H

RC2L

TH2

TL2

AUXR0

Timer 2 Control Register

Timer 2 Mode Register

Timer 2 Reload Capture Reg., High Byte

Timer 2 Reload Capture Reg., Low Byte

Timer 2, High Byte

Timer 2, Low Byte

Aux. Register 0

C8H 1)

C9H

CBH

CAH

CDH

CCH

8EH

00H

XXXXXXX0B 2)

Power

Saving

Modes

PCON 3)

Power Control Register

87H

0XXX0000B 2)

Table 3. Contents of SFRs, SFRs in Numeric Order

Address

Bit 7

54321

80H

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