C504 Datasheet, PDF (17/49 Pages) Siemens Semiconductor Group – 8-Bit CMOS Microcontroller

C504
Table 3
Contents of the SFRs, SFRs in Numeric Order of their Addresses
Addr Register Content Bit 7
after
Reset¹⁾
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
80H ²⁾ P0
FFH .7
.6
.5
.4
.3
.2
.1
.0
81H SP
07H
.7
.6
.5
.4
.3
.2
.1
.0
82H DPL
00H
.7
.6
.5
.4
.3
.2
.1
.0
83H DPH
00H
.7
.6
.5
.4
.3
.2
.1
.0
86H WDTREL 00H
WDT .6
.5
.4
.3
.2
.1
.0
PSEL
87H PCON
000X- SMOD PDS
0000B
IDLS –
GF1 GF0 PDE IDLE
88H ²⁾ TCON 00H
TF1 TR1 TF0 TR0 IE1
IT1
IE0
IT0
88H ³⁾ PCON1 0XXX- EWPD –
–
–
–
–
–
–
XXXXB
89H TMOD 00H
GATE C/T M1
M0
GATE C/T M1
M0
8AH TL0
00H
.7
.6
.5
.4
.3
.2
.1
.0
8BH TL1
00H
.7
.6
.5
.4
.3
.2
.1
.0
8CH TH0
00H
.7
.6
.5
.4
.3
.2
.1
.0
8DH TH1
00H
.7
.6
.5
.4
.3
.2
.1
.0
90H²⁾ P1
FFH .7
.6
.5
.4
.3
.2
T2EX T2
90H ²⁾³⁾ P1ANA XXXX- –
–
–
–
EAN3 EAN2 EAN1 EAN0
1111B
98H ²⁾ SCON 00H
SM0 SM1 SM2 REN TB8 RB8 TI
RI
99H SBUF XXH .7
.6
.5
.4
.3
.2
.1
.0
9AH ITCON 0010- IT2
IE2
I2ETF I2ETR I1ETF I1ETR I0ETF I0ETR
1010B
A0H²⁾ P2
FFH .7
.6
.5
.4
.3
.2
.1
.0
A8H²⁾ IEN0
0X00- EA
–
0000B
ET2 ES ET1 EX1 ET0 EX0
A9H IEN1
XX00- –
–
ECT1 ECCM ECT2 ECEM EX2 EADC
0000B
B0H²⁾ P3
FFH
RD
WR T1
T0
INT1 INT0 TxD RxD
1) X means that the value is undefined and the location is reserved
2) Bit-addressable special function registers
3) SFR is located in the mapped SFR area. For accessing this SFR, bit RMAP in SFR SYSCON must be set.
Semiconductor Group
17