GMS97C2051 datasheet(4/39 Pages) HYNIX

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GMS97C2051/L2051

8-Bit CMOS Microcontroller

HYUNDAI MicroElectronics

Special Function Registers

A map of the on-chip memory area called the Special

Function Register (SFR) space is shown in the Table1,

Table 2 and Table 3.

Note that not all of the addresses are occupied, and

unoccupied addresses may not be implemented on the

chip.

Read accesses to these addresses will in general

return random data, and write accesses will have an

indeterminate effect.

User software should not write 1s to these unlisted

locations, since they may be used in future products to

invoke new features.

In that case, the reset or inactive

values of the new bits will always be 0.

Table 1.

GMS97C2051/L2051 SFR Map and Reset Values

0F8H

0FFH

0F0H

00000000

0F7H

0E8H

0EFH

0E0H

ACC

00000000

0E7H

0D8H

0DFH

0D0H

PSW

00000000

0D7H

0C8H

0CFH

0C0H

0C7H

0B8H

XXX00000

0BFH

0B0H

11111111

0B7H

0A8H

0XX00000

0AFH

0A0H

0A7H

98H

SCON

00000000

SBUF

XXXXXXXX

9FH

90H

11111111

97H

88H

TCON

00000000

TMOD

00000000

TL0

00000000

TL1

00000000

TH0

00000000

TH1

00000000

8FH

80H

00000111

DPL

00000000

DPH

00000000

PCON

0XXX0000

87H

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