Hyundai GMS90X54C, GMS90X51C, GMS90X52C user manual E0H, F0H, D0H, A8H, B8H, A0H, B0H, C8H

GMS90X5XC Series HYUNDAI MicroElectronics

Table 2. Special Function Registers - Functional Blocks

Block	Symbol	Name	Address	Contents
				after Reset
CPU	ACC	Accumulator	E0H 1)	00H
	B	B-Register	F0H 1)	00H
	DPH	Data Pointer, High Byte	83H	00H
	DPL	Data Pointer, Low Byte	82H	00H
	PSW	Program Status Word Register	D0H 1)	00H
	SP	Stack Pointer	81H	07H
Interrupt System	IE	Interrupt Enable Register	A8H 1)	0X000000B 2)
	IP	Interrupt Priority Register	B8H 1)	XX000000B 2)
Ports	P0	Port 0	80H 1)	FFH
	P1	Port 1	90H 1)	FFH
	P2	Port 2	A0H 1)	FFH
	P3	Port 3	B0H 1)	FFH
Serial Channels	PCON 3)	Power Control Register	87H	0XXX0000B 2)
	SBUF	Serial Channel Buffer Reg.	99H	XXH 2)
	SCON	Serial Channel 0 Control Reg.	98H 1)	00H
Timer 0/ Timer 1	TCON	Timer 0/1 Control Register	88H 1)	00H
	TH0	Timer 0, High Byte	8CH	00H
	TH1	Timer 1, High Byte	8DH	00H
	TL0	Timer 0, Low Byte	8AH	00H
	TL1	Timer 1, Low Byte	8BH	00H
	TMOD	Timer Mode Register	89H	00H
Timer 2	T2CON	Timer 2 Control Register	C8H 1)	00H
	T2MOD	Timer 2 Mode Register	C9H	00H
	RC2H	Timer 2 Reload Capture Reg., High Byte	CBH	00H
	RC2L	Timer 2 Reload Capture Reg., Low Byte	CAH	00H
	TH2	Timer 2, High Byte	CDH	00H
	TL2	Timer 2, Low Byte	CCH	00H
	AUXR0	Aux. Register 0	8EH	XXXXXXX0B 2)
Power Saving	PCON 3)	Power Control Register	87H	0XXX0000B 2)
Modes

1)Bit-addressable Special Function register

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

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

Table 3. Contents of SFRs, SFRs in Numeric Order

Address Register

80HP0

Bit 7 6 5 4 3 2 1 0

Jan. 2001 Ver 1.0 13