SST89E554RC-40-C-NJE Silicon Storage Tech, SST89E554RC-40-C-NJE Datasheet - Page 18

• Manufacturer Part Number: SST89E554RC-40-C-NJE
• Description: Semiconductors and Actives, Microprocessors, Microcontrollers
• Manufacturer: Silicon Storage Tech

EOL Data Sheet
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 3-4)
3.6 Special Function Registers
Most of the unique features of the FlashFlex microcontroller family are controlled by bits in special function regis-
ters (SFRs) located in the SFR memory map shown in Table 3-6. Individual descriptions of each SFR are provided
and reset values indicated in Tables 3-7 to 3-11.
TABLE
©2007 Silicon Storage Technology, Inc.
FIGURE
1. Bit addressable SFRs
D8H
D0H
C8H
C0H
F8H
F0H
E8H
E0H
B8H
B0H
A8H
A0H
98H
90H
88H
80H
3-6: F
T2CON
WDTC
CCON
SCON
TCON
PSW
3-4: D
ACC
IEA
DPS = 0 → DPTR0
DPS = 1 → DPTR1
IPA
P3
P2
P1
P0
IP
IE
B
LASH
1
1
1
1
1
1
1
1
AUXR1 / bit0
1
1
1
1
1
1
1
1
UAL
F
DPS
LEX
T2MOD
SADEN
SADDR
CMOD
TMOD
D
SFCF
SBUF
CH
CL
SP
ATA
SFR M
P
OINTER
EMORY
CCAPM0
CCAP0H
CCAP0L
RCAP2L
AUXR1
SFCM
SPSR
DPL
TL0
O
M
DPH
83H
RGANIZATION
AP
CCAPM1
CCAP1H
RCAP2H
CCAP1L
SFAL
DPH
TL1
8 BYTES
18
DPL
82H
CCAPM2
CCAP2H
CCAP2L
SFAH
TH0
TL2
DPTR1
DPTR0
CCAPM3
CCAP3H
CCAP3L
WDTD
SPCR
SST89E564RD / SST89V564RD
SST89E554RC / SST89V554RC
SFDT
TH2
TH1
External Data Memory
CCAPM4
CCAP4H
CCAP4L
SPDR
AUXR
SFST
1207 F51.0
FlashFlex MCU
PCON
IPAH
IPH
S71207-08-EOL
T3-6.2 1207
FFH
F7H
EFH
E7H
DFH
D7H
CFH
C7H
BFH
B7H
AFH
A7H
9FH
97H
8FH
87H
1/07