C517A_99 Datasheet, PDF (41/218 Pages) Siemens Semiconductor Group – 8-Bit CMOS Microcontroller

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C517A
Table 3-2
Contents of the SFRs, SFRs in numeric order of their addresses
Addr Register Content Bit 7
after
Reset¹⁾
Bit 6
Bit 5
Bit 4
80H ²⁾ P0
FFH
.7
.6
.5
.4
81H SP
07H
.7
.6
.5
.4
82H DPL
00H
.7
.6
.5
.4
83H DPH
00H
.7
.6
.5
.4
83H WDTREL 00H
WDT- .6
.5
.4
PSEL
87H PCON
88H ²⁾ TCON
89H TMOD
8AH TL0
8BH TL1
8CH TH0
8DH TH1
90H ²⁾ P1
00H
00H
00H
00H
00H
00H
00H
FFH
SMOD PDS
TF1 TR1
GATE C/T
.7
.6
.7
.6
.7
.6
.7
.6
T2
CLK-
OUT
IDLS
TF0
M1
.5
.5
.5
.5
T2EX
SD
TR0
M0
.4
.4
.4
.4
INT2
91H XPAGE 00H
.7
.6
.5
.4
92H DPSEL XXXX- –
–
–
–
X000B
98H ²⁾ S0CON 00H
SM0 SM1 SM20 REN0
99H S0BUF XXH .7
.6
.5
.4
9AH IEN2
XX00- –
–
ECR ECS
00X0B
9BH S1CON 0X00- SM –
0000B
SM21 REN1
9CH S1BUF XXH .7
.6
.5
.4
9DH S1RELL 00H
.7
.6
.5
.4
A0H²⁾ P2
FFH
.7
.6
.5
.4
A1H COMSETL 00H
.7
.6
.5
.4
A2H COMSETH 00H
.7
.6
.5
.4
A3H COMCLRL 00H
.7
.6
.5
.4
1) X means that the value is undefined and the location is reserved
2) Shaded registers are bit-addressable special function registers
Bit 3
.3
.3
.3
.3
.3
GF1
IE1
GATE
.3
.3
.3
.3
INT6
.3
–
TB80
.3
ECT
TB81
.3
.3
.3
.3
.3
.3
Bit 2 Bit 1
.2
.1
.2
.1
.2
.1
.2
.1
.2
.1
GF0
IT1
C/T
.2
.2
.2
.2
INT5
PDE
IE0
M1
.1
.1
.1
.1
INT4
.2
.1
.2
.1
RB80 TI0
.2
.1
ECMP –
RB81 TI1
.2
.1
.2
.1
.2
.1
.2
.1
.2
.1
.2
.1
Bit 0
.0
.0
.0
.0
.0
IDLE
IT0
M0
.0
.0
.0
.0
INT3
.0
.0
RI0
.0
ES1
RI1
.0
.0
.0
.0
.0
.0
Semiconductor Group
3-15