SST89E54RD2A(2011) View Datasheet(PDF) - Silicon Storage Technology
Part Name
Description
View to exact match
SST89E54RD2A Datasheet PDF : 91 Pages
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A Microchip Technology Company
FlashFlex MCU
SST89E54RD2A/RDA / SST89E58RD2A/RDA
Not Recommended for New Designs
Table 6: CPU related SFRs
Symb
ol
ACC1
B1
PSW1
SP
DPL
DPH
IE1
IEA1
IP1
IPH
IP11
IP1H
PCON
Description
Accumulator
B Register
Program Status
Word
Stack Pointer
Data Pointer
Low
Data Pointer
High
Interrupt Enable
Interrupt
Enable A
Interrupt Priority
Reg
Interrupt Priority
Reg High
Interrupt Priority
Reg A
Interrupt Priority
Reg A High
Power Control
Direct
Addres
s
E0H
F0H
D0H
81H
82H
83H
A8H
E8H
B8H
B7H
F8H
F7H
87H
AUXR Auxiliary Reg
AUXR1 Auxiliary Reg 1
XICON2 External
Interrupt Control
8EH
A2H
AEH
1. Bit Addressable SFRs
2. X = Don’t care
Bit Address, Symbol, or Alternative Port Function
MSB
ACC[7:0]
B[7:0]
CY
AC F0 RS1 RS0 OV
LSB
F1
P
SP[7:0]
DPL[7:0]
DPH[7:0]
EA
EC ET2 ES ET1 EX1 ET0 EX0
-
-
-
- EBO -
-
-
-
PPC PT2 PS PT1 PX1 PT0 PX0
- PPCH PT2H PSH PT1H PX1H PT0H PX0H
-
-
-
- PBO PX3 PX2
-
-
-
-
- PBOH PX3H PX3
-
SMOD SMOD BOF PO GF1 GF0 PD IDL
1
0
F
-
-
-
-
-
- EXTRAM AO
-
-
-
- GF2 0
-
DPS
X
EX3 IE3 IT3 0 EX2 IE2 IT2
Reset
Value
00H
00H
00H
07H
00H
00H
00H
xxxx0xxxb
x0000000b
x0000000b
xxxx0xxxb
xxxx0xxxb
00010000b
xxxxxxx00b
xxxx00x0b
00H
T0-0.0 25114
©2011 Silicon Storage Technology, Inc.
17
DS25114A
12/11
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