參數(shù)資料
型號: SST89C58-33-I-TQJE
廠商: SILICON STORAGE TECHNOLOGY INC
元件分類: 微控制器/微處理器
英文描述: 8-BIT, FLASH, 33 MHz, MICROCONTROLLER, PQFP44
封裝: LEAD FREE, TQFP-44
文件頁數(shù): 6/52頁
文件大?。?/td> 967K
代理商: SST89C58-33-I-TQJE
14
Data Sheet
FlashFlex51 MCU
SST89C54 / SST89C58
2004 Silicon Storage Technology, Inc.
S71131-04-000
6/04
3.3 Data RAM Memory
SST89C54/58 have 256 Bytes x8 bits internal RAM and can address up to 64 KByte of external data memory.
3.4 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 FlashFlex51 SFR memory map shown below. Individual descriptions of each SFR are
provided and Reset values indicated in Tables 3-3 to 3-7.
3.4.1 SST89C54/58 Special Function Registers
TABLE
3-2: FLASHFLEX51 SFR MEMORY MAP
8 BYTES
F8H
FFH
F0H
B1
1. SFRs are bit addressable.
F7H
E8H
EFH
E0H
ACC1
E7H
D8H
DFH
D0H
PSW1
D7H
C8H
T2CON1
RCAP2L
RCAP2H
TL2
TH2
CFH
C0H
WDTC1
C7H
B8H
IP1
BFH
B0H
P31
SFCF
SFCM
SFAL
SFAH
SFDT
SFST
B7H
A8H
IE1
AFH
A0H
P21
A7H
98H
SCON1
SBUF
9FH
90H
P11
97H
88H
TCON1
TMOD
TL0
TL1
TH0
TH1
8FH
80H
P01
SP
DPL
DPH
WDTD
PCON
87H
T3-2.1 1131
TABLE
3-3: CPU RELATED SFRS
Symbol
Description
Direct
Address
Bit Address, Symbol, or Alternative Port Function
RESET
Value
MSB
LSB
ACC1
1. Bit Addressable SFRs
Accumulator
E0H
ACC[7:0]
00H
B*
B Register
F0H
B[7:0]
00H
PSW*
Program Status Word
D0H
CY
AC
F0
RS1
RS0
OV
F1
P
00H
SP
Stack Pointer
81H
SP[7:0]
07H
DPL
Data Pointer Low
82H
DPL[7:0]
00H
DPH
Data Pointer High
83H
DPH[7:0]
00H
IE*
Interrupt Enable
A8H
EA
-
ET2
ES
ET1
EX1
ET0
EX0
00H
IP*
Interrupt Priority
B8H
-
PT2
PS
PT1
PX1
PT0
PX0
xx000000b
PCON
Power Control
87H
SMOD
-
GF1
GF0
PD
-
0xxx0000b
T3-3.6 1131
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