SST89E554RC-40-I-PIE Microchip Technology, SST89E554RC-40-I-PIE Datasheet - Page 18

• Manufacturer Part Number: SST89E554RC-40-I-PIE
• Description: 8-bit Microcontrollers - MCU 32KB+8KB 40ns
• Manufacturer: Microchip Technology

Specifications of SST89E554RC-40-I-PIE

• Rohs: yes
• Core: 8051
• Data Bus Width: 8 bit
• Maximum Clock Frequency: 40 MHz
• Program Memory Size: 32 KB
• Data Ram Size: 1 KB
• On-chip Adc: No
• Operating Supply Voltage: 4.5 V to 5.5 V
• Package / Case: PDIP-40
• Mounting Style: Through Hole
• Data Rom Size: 128 B
• Interface Type: SPI, UART
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Number Of Programmable I/os: 32
• Number Of Timers: 16 bit
• Processor Series: FlashFlex
• Program Memory Type: Flash
• Supply Voltage - Max: 5.5 V
• Supply Voltage - Min: 4.5 V

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