Table 4-3. special-function register reset values – Maxim Integrated Ultra-High-Speed Flash Microcontroller User Manual
Page 20

4-12
Ultra-High-Speed Flash
Microcontroller User’s Guide
REGISTER
ADDRESS
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
P0
80h
1
1
1
1
1
1
1
1
SP
81h
0
0
0
0
0
1
1
1
DPL
82h
0
0
0
0
0
0
0
0
DPH
83h
0
0
0
0
0
0
0
0
DPL1
84h
0
0
0
0
0
0
0
0
DPH1
85h
0
0
0
0
0
0
0
0
DPS
86h
0
0
0
0
0
1
0
0
PCON
87h
0
0
Special
Special
0
0
0
0
TCON
88h
0
0
0
0
0
0
0
0
TMOD
89h
0
0
0
0
0
0
0
0
TL0
8Ah
0
0
0
0
0
0
0
0
TL1
8Bh
0
0
0
0
0
0
0
0
TH0
8Ch
0
0
0
0
0
0
0
0
TH1
8Dh
0
0
0
0
0
0
0
0
CKCON
8Eh
0
0
0
0
0
0
0
1
P1
90h
1
1
1
1
1
1
1
1
EXIF
91h
0
0
0
0
Special
Special
Special
0
CKMOD
96h
1
1
0
0
0
1
1
1
SCON0
98h
0
0
0
0
0
0
0
0
SBUF0
99h
0
0
0
0
0
0
0
0
RID
9Ah
Special
Special
Special
Special
Special
Special
Special
Special
ACON
9Dh
0
0
0
1
1
1
1
1
P2
A0h
1
1
1
1
1
1
1
1
IE
A8h
0
0
0
0
0
0
0
0
SADDR0
A9h
0
0
0
0
0
0
0
0
SADDR1
AAh
0
0
0
0
0
0
0
0
P3
B0h
1
1
1
1
1
1
1
1
IP1
B1h
1
0
0
0
0
0
0
0
IP0
B8h
1
0
0
0
0
0
0
0
SADEN0
B9h
0
0
0
0
0
0
0
0
SADEN1
BAh
0
0
0
0
0
0
0
0
SCON1
C0h
0
0
0
0
0
0
0
0
SBUF1
C1h
0
0
0
0
0
0
0
0
ROMSIZE
C2h
1
1
1
1
0
1
0
1
PMR
C4h
1
0
0
0
0
0
0
0
STATUS
C5h
0
0
0
1
0
0
0
0
TA
C7h
1
1
1
1
1
1
1
1
T2CON
C8h
0
0
0
0
0
0
0
0
T2MOD
C9h
1
1
1
1
1
1
0
0
RCAP2L
CAh
0
0
0
0
0
0
0
0
RCAP2H
CBh
0
0
0
0
0
0
0
0
TL2
CCh
0
0
0
0
0
0
0
0
TH2
CDh
0
0
0
0
0
0
0
0
PSW
D0h
0
0
0
0
0
0
0
0
FCNTL
D5h
1
0
1
1
0
0
0
0
FDATA
D6h
0
0
0
0
0
0
0
0
WDCON
D8h
0
Special
0
Special
0
Special
Special
0
ACC
E0h
0
0
0
0
0
0
0
0
EIE
E8h
1
1
1
0
0
0
0
0
B
F0h
0
0
0
0
0
0
0
0
EIP1
F1h
1
1
1
0
0
0
0
0
EIP0
F8h
1
1
1
0
0
0
0
0
Table 4-3. Special-Function Register Reset Values
Maxim Integrated