參數(shù)資料
型號: DS89C21TMX
元件分類: 收發(fā)器
英文描述: Transceiver
中文描述: 收發(fā)器
文件頁數(shù): 18/48頁
文件大小: 934K
代理商: DS89C21TMX
DS89C430/DS89C440/DS89C450 Ultra-High-Speed Flash Microcontrollers
18 of 48
Table 2. SFR Reset Value
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
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
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