GMS90C320 Datasheet, PDF(14/46 Page) Hynix Semiconductor – HYNIX SEMICONDUCTOR INC. 8-BIT SINGLE-CHIP MICROCONTROLLERS

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GMS90C320 Datasheet, PDF (14/46 Pages) Hynix Semiconductor – HYNIX SEMICONDUCTOR INC. 8-BIT SINGLE-CHIP MICROCONTROLLERS

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GMS90C320

Special Function Registers

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

area.

The 27 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 GMS90C320. Table 3 illustrates the contents of the SFRs.

Table 1

Special Function Registers in Numeric Order of their Addresses

Address

Register

Contents after

Reset

80H

P01)

FFH

81H

SP

07H

82H

DPL

00H

83H

DPH

00H

84H

reserved

XXH 2)

85H

reserved

XXH 2)

86H

reserved

XXH 2)

87H

PCON

0XXX0000B2)

88H

TCON1)

00H

89H

TMOD

00H

8AH

TL0

00H

8BH

TL1

00H

8CH

TH0

00H

8DH

TH1

00H

8EH

reserved

XXH 2)

8FH

reserved

XXH 2)

90H

P11)

FFH

91H

reserved

00H

92H

reserved

XXH 2)

93H

reserved

XXH 2)

94H

reserved

XXH 2)

95H

reserved

XXH 2)

96H

reserved

XXH 2)

97H

reserved

XXH 2)

98H

SCON1)

00H

99H

SBUF

XXH 2)

9AH

reserved

XXH 2)

9BH

reserved

XXH 2)

9CH

reserved

XXH 2)

9DH

reserved

XXH 2)

9EH

reserved

XXH 2)

9FH

reserved

XXH 2)

1) : Bit-addressable Special Function Register

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

Address

A0H

A1H

A2H

A3H

A4H

A5H

A6H

A7H

A8H

A9H

AAH

ABH

ACH

ADH

AEH

AFH

B0H

B1H

B2H

B3H

B4H

B5H

B6H

B7H

B8H

B9H

BAH

BBH

BCH

BDH

BEH

BFH

Register

P21)

reserved

reserved

reserved

reserved

reserved

reserved

reserved

IE1)

reserved

reserved

reserved

reserved

reserved

reserved

reserved

P31)

reserved

reserved

reserved

reserved

reserved

reserved

reserved

IP1)

reserved

reserved

reserved

reserved

reserved

reserved

reserved

Contents after

Reset

FFH

XXH 2)

XXH 2)

XXH 2)

XXH 2)

XXH 2)

XXH 2)

XXH 2)

0X000000B2)

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)

XX000000B2)

XXH 2)

XXH 2)

XXH 2)

XXH 2)

XXH 2)

XXH 2)

XXH 2)

10

OCT. 2000 Ver 1.2

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