Hyundai GMS90X51C, GMS90X52C, GMS90X54C user manual Special Function Registers

GMS90X5XC Series HYUNDAI MicroElectronics

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 GMS90X5XC series. Table 3 illustrates the contents of the SFRs

Table 1. Special Function Registers in Numeric Order of their Addresses (cont’d)

Address	Register	Contents after	Address	Register	Contents after
		Reset			Reset
80H	P0 1)	FFH	88H	TCON 1)	00H
81H	SP	07H	89H	TMOD	00H
82H	DPL	00H	8AH	TL0	00H
83H	DPH	00H	8BH	TL1	00H
84H	reserved	XXH 2)	8CH	TH0	00H
85H	reserved	XXH 2)	8DH	TH1	00H
86H	reserved	XXH 2)	8EH	AUXR0	XXH 2)
87H	PCON	0XXX0000B 2)	8FH	CKCON	XXXXXXX0B 2)
90H	P1 1)	FFH	98H	SCON 1)	00H
91H	reserved	00H	99H	SBUF	XXH 2)
92H	reserved	XXH 2)	9AH	reserved	XXH 2)
93H	reserved	XXH 2)	9BH	reserved	XXH 2)
94H	reserved	XXH 2)	9CH	reserved	XXH 2)
95H	reserved	XXH 2)	9DH	reserved	XXH 2)
96H	reserved	XXH 2)	9EH	reserved	XXH 2)
97H	reserved	XXH 2)	9FH	reserved	XXH 2)
A0H	P2 3)	FFH	A8H	IE 1)	0X000000B 2)
A1H	reserved	XXH 2)	A9H	reserved	XXH 2)
A2H	reserved	XXH 2)	AAH	reserved	XXH 2)
A3H	reserved	XXH 2)	ABH	reserved	XXH 2)
A4H	reserved	XXH 2)	ACH	reserved	XXH 2)
A5H	reserved	XXH 2)	ADH	reserved	XXH 2)
A6H	reserved	XXH 2)	AEH	reserved	XXH 2)
A7H	reserved	XXH 2)	AFH	reserved	XXH 2)
B0H	P3 1)	FFH	B8H	IP 1)	XX000000B 2)
B1H	reserved	XXH 2)	B9H	reserved	XXH 2)
B2H	reserved	XXH 2)	BAH	reserved	XXH 2)
B3H	reserved	XXH 2)	BBH	reserved	XXH 2)
B4H	reserved	XXH 2)	BCH	reserved	XXH 2)
B5H	reserved	XXH 2)	BDH	reserved	XXH 2)
B6H	reserved	XXH 2)	BEH	reserved	XXH 2)
B7H	reserved	XXH 2)	BFH	reserved	XXH 2)

Jan. 2001 Ver 1.0 11