HMS99C52 Datasheet, PDF(15/43 Page) Hynix Semiconductor – 8-BIT SINGLE-CHIP MICROCONTROLLERS

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HMS99C52 Datasheet, PDF (15/43 Pages) Hynix Semiconductor – 8-BIT SINGLE-CHIP MICROCONTROLLERS

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HMS99C5X Series

SPECIAL FUNCTION REGISTERS

All registers, except the program counter and the four general purpose register banks, reside in the special func-

tion register area.

The 28 special function registers (SFR) include pointers and registers that provide an interface between the CPU

and the other on-chip peripherals. There are also 128 directly addressable bits within the SFR area.

All SFRs are listed in Table 1, Table 2, and Table 3.

In Table 1 they are organized in numeric order of their addresses. In Table 2 they are organized in groups which

refer to the functional blocks of the HMS99C5X series. Table 3 illustrates the contents of the SFRs

Table 1. Special Function Registers in Numeric Order of their Addresses (contâd)

Address

80H

81H

82H

83H

84H

85H

86H

87H

90H

91H

92H

93H

94H

95H

96H

97H

A0H

A1H

A2H

A3H

A4H

A5H

A6H

A7H

B0H

B1H

B2H

B3H

B4H

B5H

B6H

B7H

Register

P0 1)

SP

DPL

DPH

reserved

reserved

reserved

PCON

P1 1)

reserved

reserved

reserved

reserved

reserved

reserved

reserved

P2 3)

reserved

reserved

reserved

reserved

reserved

reserved

reserved

P3 1)

reserved

reserved

reserved

reserved

reserved

reserved

reserved

Contents after

Reset

FFH

07H

00H

00H

XXH 2)

XXH 2)

XXH 2)

0XXX0000B 2)

FFH

00H

XXH 2)

XXH 2)

XXH 2)

XXH 2)

XXH 2)

XXH 2)

FFH

XXH 2)

XXH 2)

XXH 2)

XXH 2)

XXH 2)

XXH 2)

XXH 2)

FFH

XXH 2)

XXH 2)

XXH 2)

XXH 2)

XXH 2)

XXH 2)

XXH 2)

Address

88H

89H

8AH

8BH

8CH

8DH

8EH

8FH

98H

99H

9AH

9BH

9CH

9DH

9EH

9FH

A8H

A9H

AAH

ABH

ACH

ADH

AEH

AFH

B8H

B9H

BAH

BBH

BCH

BDH

BEH

BFH

Register

TCON 1)

TMOD

TL0

TL1

TH0

TH1

AUXR0

CKCON

SCON 1)

SBUF

reserved

reserved

reserved

reserved

reserved

reserved

IE 1)

reserved

reserved

reserved

reserved

reserved

reserved

reserved

IP 1)

reserved

reserved

reserved

reserved

reserved

reserved

reserved

Contents after

Reset

00H

00H

00H

00H

00H

00H

XXH 2)

XXXXXXX0B 2)

00H

XXH 2)

XXH 2)

XXH 2)

XXH 2)

XXH 2)

XXH 2)

XXH 2)

0X000000B 2)

XXH 2)

XXH 2)

XXH 2)

XXH 2)

XXH 2)

XXH 2)

XXH 2)

XX000000B 2)

XXH 2)

XXH 2)

XXH 2)

XXH 2)

XXH 2)

XXH 2)

XXH 2)

Jan. 2003 Ver 1.0

11

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