Maxim Integrated High-Speed Microcontroller Users Guide: DS80C390 Supplement - Manual (Page 96)

High-Speed Microcontroller User’s Guide: DS80C390 Supplement
96 of 158
Figure 6-1. EXAMPLE DS80C390 PROGRAM/DATA MEMORY INTERFACE
512k X 8
FLASH
PROGRAM
MEMORY
D0–D7
A0–A7
A8–A15
A16–A18
E
o
CE
512k x 8
FLASH
PROGRAM
MEMORY
D0–D7
A0–A7
A8–A15
A16–A18
E
o
CE
VCC
AD7/D7
EA\
ALE
PSEN\
P2.7\A15
P2.6\A14
P2.5\A13
GND
VCC
P2.4/A12
P2.3/A11
P2.2/A10
P2.1/A9
P2.0/A8
P4.0/CE0\
P4.1/CE1\ P1.7/A7
RST
RSTOL
P3.0/RXD0
P3.1/TXD0
P3.2/INT0\
P3.3/INT1\
VCC
GND
P3.4/T0
P3.5/T1/CLKO
P3.6/WR\
P3.7/RD\
P5.7/PCE3\
P5.6/PCE2\
P5.5/PCE1\
P1.6/A6 P1.5/A5 P1.4/A4 P1.3/A3 P1.2/A2 P1.1/A1 P1.0/A0 GND VCC AD0/
D
0
AD1/
D
1
AD2/
D
2
AD3/
D
3
AD4/
D
4
AD5/
D
5
AD6/
D
6
P5.4/PCE0
\
P5.3/C1T
X
P5.2/C1R
X
P5.1/C0R
X
P5.0/C0T
X
VCC
XTAL2 XTAL1
GND
MU
X
\
P4.7/A19 P4.6/A18 P4.5/A17 P4.4/A16 P4.3/CE3
\
P4.2/CE2
\
DS80C390
512k x 8
DATA
MEMORY
D0–D7
A0–A7
A8–A15
A16–A18
E
o
WE
CE
512k x 8
DATA
MEMORY
D0–D7
A0–A7
A8–A15
A16–A18
E
o
WE
CE
512k x 8
DATA
MEMORY
D0–D7
A0–A7
A8–A15
A16–A18
E
o
WE
CE