C504 SIEMENS [Siemens Semiconductor Group], C504 Datasheet - Page 17

• Manufacturer Part Number: C504
• Description: 8-Bit CMOS Microcontroller
• Manufacturer: SIEMENS [Siemens Semiconductor Group]

Table 3
Contents of the SFRs, SFRs in Numeric Order of their Addresses
Addr Register Content
80 H
81 H
82 H
83 H
86 H
87 H
88 H
88 H
89 H
8A H
8B H
8C H
8D H
90 H
90 H
98 H
99 H
9A H
A0 H
A8 H
A9 H
B0 H
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
2)
2)
2)
2)
2)3)
2)
2)
3)
2)
P0
SP
DPL
DPH
WDTREL 00 H
PCON
TCON
PCON1
TMOD
TL0
TL1
TH0
TH1
P1
P1ANA
SCON
SBUF
ITCON
P2
IEN0
IEN1
P3
after
Reset
FF H
07 H
00 H
00 H
000X-
0000 B
00 H
0XXX-
XXXX B
00 H
00 H
00 H
00 H
00 H
FF H
XXXX-
1111 B
00 H
XX H
0010-
1010 B
FF H
0X00-
0000 B
XX00-
0000 B
FF H
1)
Bit 7
.7
.7
.7
.7
WDT
PSEL
SMOD PDS
TF1
EWPD –
GATE
.7
.7
.7
.7
.7
–
SM0
.7
IT2
.7
EA
–
RD
Bit 6
.6
.6
.6
.6
.6
TR1
C/T
.6
.6
.6
.6
.6
–
SM1
.6
IE2
.6
–
–
WR
Bit 5
.5
.5
.5
.5
.5
IDLS
TF0
–
M1
.5
.5
.5
.5
.5
–
SM2
.5
I2ETF
.5
ET2
ECT1
T1
17
Bit 4
.4
.4
.4
.4
.4
–
TR0
–
M0
.4
.4
.4
.4
.4
–
REN
.4
I2ETR
.4
ES
ECCM ECT2
T0
Bit 3
.3
.3
.3
.3
.3
GF1
IE1
–
GATE
.3
.3
.3
.3
.3
EAN3
TB8
.3
I1ETF
.3
ET1
INT1
Bit 2
.2
.2
.2
.2
.2
GF0
IT1
–
C/T
.2
.2
.2
.2
.2
EAN2
RB8
.2
I1ETR
.2
EX1
ECEM EX2
INT0
Bit 1
.1
.1
.1
.1
.1
PDE
IE0
–
M1
.1
.1
.1
.1
T2EX
EAN1
TI
.1
I0ETF
.1
ET0
TxD
Bit 0
.0
.0
.0
.0
.0
IDLE
IT0
–
M0
.0
.0
.0
.0
T2
EAN0
RI
.0
I0ETR
.0
EX0
EADC
RxD
C504