DS89C420-QCL Datasheet, PDF (14/139 Pages) Maxim Integrated Products – Ultra-High-Speed Flash Microcontroller User’s Guide

Ultra-High-Speed Flash
Microcontroller User’s Guide
Special-Function Register Locations
REGISTER
P0
SP
DPL
ADDRESS
80h
81h
82h
BIT 7
P0.7
DPH
83h
DPL1
84h
DPH1
DPS
85h
86h
ID1
PCON
TCON
TMOD
TL0
TL1
87h
SMOD_0
88h
TF1
89h
GATE
8Ah
8Bh
TH0
8Ch
TH1
8Dh
CKCON
P1
EXIF
CKMOD
8Eh
WD1
90h
P1.7
91h
IE5
96h
SCON0
SBUF0
98h
SM0/FE_0
99h
ACON
P2
IE
SADDR0
SADDR1
9Dh
PAGEE
A0h
P2.7
A8h
EA
A9h
AAh
P3
B0h
P3.7
IP1
B1h
—
IP0
SADEN0
SADEN1
SCON1
SBUF1
ROMSIZE
B8h
—
B9h
BAh
C0h
SM0/FE_1
C1h
C2h
PMR
STATUS
TA
T2CON
T2MOD
C4h
CD1
C5h
PIS2
C7h
C8h
TF2
C9h
—
RCAP2L
CAh
RCAP2H
CBh
TL2
CCh
TH2
CDh
PSW
FCNTL
FDATA
WDCON
ACC
D0h
CY
D5h
FBUSY
D6h
D8h
SMOD_1
E0h
EIE
E8h
—
B
F0h
EIP1
EIP0
F1h
F8h
—
Note: Shaded bits are timed-access protected.
BIT 6
P0.6
ID0
SMOD0
TR1
C/T
WD0
P1.6
IE4
SM1_0
PAGES1
P2.6
ES1
P3.6
MPS1
LPS1
SM1_1
CD0
PIS1
EXF2
—
AC
FERR
POR
—
—
BIT 5
P0.5
TSL
OFDF
TF0
M1
T2M
P1.5
IE3
T2MH
SM2_0
PAGES0
P2.5
ET2
P3.5
MPT2
LPT2
SM2_1
SWB
PIS0
RCLK
—
F0
EPFI
—
—
BIT 4
P0.4
AID
OFDE
TR0
M0
T1M
P1.4
IE2
T1MH
REN_0
P2.4
ES0
P3.4
MPS0
LPS0
REN_1
CTM
—
TCLK
—
RS1
PFI
EWDI
MPWDI
LPWDI
BIT 3
P0.3
BIT 2
P0.2
—
—
GF1
GF0
IE1
IT1
GATE
C/T
T0M
P1.3
CKRY
T0MH
TB8_0
MD2
P1.2
RGMD
RB8_0
P2.3
ET1
P2.2
EX1
P3.3
MPT1
LPT1
P3.2
MPX1
LPX1
TB8_1
PRAME
4X/2X
SPTA1
EXEN2
—
RB8_1
RMS2
ALEON
SPRA1
TR2
—
RS0
FC3
WDIF
EX5
MPX5
LPX5
OV
FC2
WTRF
EX4
MPX4
LPX4
BIT 1
P0.1
—
STOP
IE0
M1
MD1
P1.1
RGSL
TI_0
P2.1
ET0
P3.1
MPT0
LPT0
TI_1
RMS1
DME1
SPTA0
C/T2
T2OE
F1
FC1
EWT
EX3
MPX3
LPX3
BIT 0
P0.0
SEL
IDLE
IT0
M0
MD0
P1.0
BGS
RI_0
P2.0
EX0
P3.0
MPX0
LPX0
RI_1
RMS0
DME0
SPRA0
CP/RL2
DCEN
P
FC0
RWT
EX2
MPX2
LPX2
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