DS80C390_00 Datasheet, PDF (6/155 Pages) Dallas Semiconductor – High-Speed Microcontroller User’s Guide Supplement

DS80C390 High-Speed Microcontroller User’s Guide Supplement
SPECIAL FUNCTION REGISTERS
Most of the unique features of the High-Speed Microcontroller family are controlled by bits in special
function registers (SFRs) located in unused locations in the 8051 SFR map. This allows for increased
functionality while maintaining complete instruction set compatibility. The SFRs reside in register
locations 80h-FFh and are accessed using direct addressing. SFRs that end in 0 or 8 are bit addressable.
The first table indicates the names and locations of the SFRs used by the DS80C390 and individual bits in
those registers. Bits protected by the Timed Access function are shaded. The second table indicates the
reset state of all SFR bits. Following these tables is a complete description of DS80C390 SFRs that are
new to the 8051 architecture or have new or modified functionality.
SPECIAL FUNCTION REGISTER LOCATION Table 4-1
Register Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Address
P4
A19/P4.7 A18/P4.6 A17/P4.5 A16/P4.4 _{CE3 /P4.3 CE2 /P4.2 CE1 /P4.1 CE0 /P4.0} 80h
SP
DPL
DPH
DPL1
DPH1
DPS
ID1
ID0
TSL
-
-
PCON SMOD_0 SMOD0 OFDF
OFDE
GF1
TCON
TF1
TR1
TF0
TR0
IE1
81h
82h
83h
84h
85h
-
-
SEL
86h
GF0
STOP
IDLE
87h
IT1
IE0
IT0
88h
TMOD GATE
C/ T
M1
M0
GATE
C/ T
M1
M0
89h
TL0
8Ah
TL1
8Bh
TH0
8Ch
TH1
8Dh
CKCON WD1
WD0
T2M
T1M
T0M
MD2
MD1
MD0
8Eh
P1 INT5/P1.7 INT4/P1.6 INT3/P1.5 INT2/P1.4 TXD1/P1.3 RXD1/P1.2 T2EX/P1.1 T2/P1.0 90h
EXIF
IE5
IE4
IE3
IE2
CKRY RGMD RGSL
BGS
91h
P4CNT
-
SBCAN P4CNT.5 P4CNT.4 P4CNT.3 P4CNT.2 P4CNT.1 P4CNT.0 92h
DPX
93h
DPX1
95h
C0RMS0
96h
C0RMS1
97h
SCON0 SM0/FE_0 SM1_0 SM2_0 REN_0 TB8_0 RB8_0
TI_0
RI_0
98h
SBUF0
99h
ESP
-
-
-
-
-
-
ESP.1
ESP.0
9Bh
AP
9Ch
ACON
-
-
-
-
-
SA
AM1
AM0
9Dh
C0TMA0
9Eh
C0TMA1
9Fh
P2
A15/P2.7 A14/P2.6 A13/P2.5 A12/P2.4 A11/P2.3 A10/P2.2 A9/P2.1 A8/P2.0 A0h
P5 _{PCE3 /P5.7 PCE2 /P5.6 PCE1 /P5.5 PCE0 /P5.4} C1TX/P5.3 C1RX/P5.2 C0RX/P5.1 C0TX/P5.0 A1h
P5CNT CAN1BA CAN0BA SP1EC C1_I/O C0_I/O P5CNT.2 P5CNT.1 P5CNT.0 A2h
C0C
ERIE
STIE
PDE SIESTA CRST AUTOB ERCS SWINT A3h
C0S BUSOFF CECE
WKS
RXS
TXS
ER2
ER1
ER0
A4h
C0IR INTIN7 INTIN6 INTIN5 INTIN4 INTIN3 INTIN2 INTIN1 INTIN0 A5h
C0TE
A6h
C0RE
A7h
IE
EA
ES1
ET2
ES0
ET1
EX1
ET0
EX0
A8h
SADDR0
A9h
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