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SST89E58RD2-33-I-QJ Datasheet(PDF) 16 Page - Silicon Storage Technology, Inc

No. de pieza SST89E58RD2-33-I-QJ
Descripción Electrónicos  FlashFlex51 MCU
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Fabricante Electrónico  SST [Silicon Storage Technology, Inc]
Página de inicio  http://www.sst.com/
Logo SST - Silicon Storage Technology, Inc

SST89E58RD2-33-I-QJ Datasheet(HTML) 16 Page - Silicon Storage Technology, Inc

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Data Sheet
FlashFlex51 MCU
SST89E52RD2/RD / SST89E54RD2/RD / SST89E58RD2/RD
SST89V52RD2/RD / SST89V54RD2/RD / SST89V58RD2/RD
©2006 Silicon Storage Technology, Inc.
S71255-05-000
5/06
3.5 Dual Data Pointers
The device has two 16-bit data pointers. The DPTR Select (DPS) bit in AUXR1 determines which of the two data
pointers is accessed. When DPS=0, DPTR0 is selected; when DPS=1, DPTR1 is selected. Quickly switching
between the two data pointers can be accomplished by a single INC instruction on AUXR1. (See Figure 3-5)
FIGURE
3-5: Dual Data Pointer Organization
3.6 Special Function Registers
Most of the unique features of the FlashFlex51 microcontroller family are controlled by bits in special function regis-
ters (SFRs) located in the SFR memory map shown in Table 3-4. Individual descriptions of each SFR are provided
and reset values indicated in Tables 3-5 to 3-9.
TABLE
3-4: FlashFlex51 SFR Memory Map
8 BYTES
F8H
IP11
1. Bit addressable SFRs
CH
CCAP0H
CCAP1H
CCAP2H
CCAP3H
CCAP4H
FFH
F0H
B1
IP1H
F7H
E8H
IEA1
CL
CCAP0L
CCAP1L
CCAP2L
CCAP3L
CCAP4L
EFH
E0H
ACC1
E7H
D8H
CCON1
CMOD
CCAPM0
CCAPM1
CCAPM2
CCAPM3
CCAPM4
DFH
D0H
PSW1
SPCR
D7H
C8H
T2CON1
T2MOD
RCAP2L
RCAP2H
TL2
TH2
CFH
C0H
WDTC1
C7H
B8H
IP1
SADEN
BFH
B0H
P31
SFCF
SFCM
SFAL
SFAH
SFDT
SFST
IPH
B7H
A8H
IE1
SADDR
SPSR
XICON
AFH
A0H
P21
AUXR1
P4
A7H
98H
SCON1
SBUF
9FH
90H
P11
97H
88H
TCON1
TMOD
TL0
TL1
TH0
TH1
AUXR
8FH
80H
P01
SP
DPL
DPH
WDTD
SPDR
PCON
87H
T3-4.0 1255
DPL
82H
DPS = 0
→ DPTR0
DPS = 1
→ DPTR1
External Data Memory
DPS
1255 F06.0
DPH
83H
DPTR0
DPTR1
AUXR1 / bit0


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