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| C501 Datasheet, PDF (17/48 Pages) Siemens Semiconductor Group – 8-Bit CMOS Microcontroller | |||
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C501
Table 2
Special Function Registers - Functional Blocks
Block Symbol Name
Address Contents after
Reset
CPU
ACC
B
DPH
DPL
PSW
SP
Interrupt IE
System IP
Ports
P0
P1
P2
P3
Serial
Channel
PCON 2)
SBUF
SCON
Timer 0 /
Timer 1
TCON
TH0
TH1
TL0
TL1
TMOD
Timer 2
T2CON
T2MOD
RC2H
RC2L
TH2
TL2
Pow. Sav. PCON 2)
Modes
Accumulator
B-Register
Data Pointer, High Byte
Data Pointer, Low Byte
Program Status Word Register
Stack Pointer
E0H 1)
F0H 1)
83H
82H
D0H 1)
81H
Interrupt Enable Register
Interrupt Priority Register
A8H1)
B8H 1)
Port 0
Port 1
Port 2
Port 3
80H 1)
90H 1)
A0H 1)
B0H 1)
Power Control Register
Serial Channel Buffer Register
Serial Channel Control Register
87H
99H
98H 1)
Timer 0/1 Control Register
Timer 0, High Byte
Timer 1, High Byte
Timer 0, Low Byte
Timer 1, Low Byte
Timer Mode Register
88H 1)
8CH
8DH
8AH
8BH
89H
Timer 2 Control Register
C8H 1)
Timer 2 Mode Register
C9H
Timer 2 Reload/Capture Register, High Byte CBH
Timer 2 Reload/Capture Register, Low Byt CAH
Timer 2 High Byte
CDH
Timer 2 Low Byte
CCH
Power Control Register
87H
00H
00H
00H
00H
00H
07H
0X000000B 3)
XX000000B 3)
FFH
FFH
FFH
FFH
0XXX0000B 3)
XXH 3)
00H
00H
00H
00H
00H
00H
00H
00H
XXXXXXX0B 3)
00H
00H
00H
00H
0XXX0000B 3)
1) Bit-addressable special function registers
2) This special function register is listed repeatedly since some bits of it also belong to other functional blocks.
3) âXâ means that the value is undefined and the location is reserved
Semiconductor Group
17
1997-04-01
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