SAF-C502-2R20N Siemens Semiconductor Group, SAF-C502-2R20N Datasheet - Page 14

• Manufacturer Part Number: SAF-C502-2R20N
• Description: 8-Bit CMOS Microcontroller
• Manufacturer: Siemens Semiconductor Group

Special Function Registers
All registers, except the program counter and the four general purpose register banks, reside in the
special function register area.
The 36 special function register (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
SAB-C502. Table 3 illustrates the contents of the SFRs.
Table 1
Special Function Register in Numeric Order of their Addresses
1)
2)
Semiconductor Group
: Bit-addressable Special Function Register
: X means that the value is indeterminate and the location is reserved
Address
8C H
8D H
8A H
8B H
8E H
80 H
81 H
82 H
83 H
84 H
85 H
86 H
87 H
88 H
89 H
8F H
90 H
91 H
92 H
93 H
94 H
95 H
96 H
97 H
WDTREL
Register
reserved
reserved
reserved
reserved
reserved
reserved
reserved
reserved
TCON
XPAGE
DPSEL
PCON
TMOD
XCON
DPH
P0
DPL
TH0
TH1
P1
TL0
TL1
SP
1)
1)
1)
XXXXX000 B
000X0000 B
after Reset
Contents
XX H
XX H
XX H
XX H
XX H
XX H
FF H
FF H
07 H
00 H
00 H
00 H
00 H
00 H
00 H
00 H
00 H
00 H
00 H
F8 H
2)
2)
2)
2)
2)
2)
2)
2)
13
Address
AA H
AB H
AC H
AD H
AE H
9A H
9B H
9C H
9D H
9E H
A0 H
A1 H
A2 H
A3 H
A4 H
A5 H
A6 H
A7 H
A8 H
A9 H
AF H
98 H
99 H
9F H
Register
reserved
reserved
reserved
reserved
reserved
reserved
reserved
reserved
reserved
reserved
reserved
reserved
reserved
reserved
reserved
reserved
reserved
reserved
reserved
SCON
SRELL
SBUF
P2
IE
1)
1)
1)
0X000000 B
after Reset
Contents
XX H
XX H
XX H
XX H
XX H
XX H
XX H
XX H
XX H
XX H
XX H
XX H
XX H
XX H
XX H
XX H
XX H
XX H
XX H
XX H
FF H
00 H
D9 H
C502
2)
2)
2)
2)
2)
2)
2)
2)
2)
2)
2)
2)
2)
2)
2)
2)
2)
2)
2)
2)
2)